The A15SMS engine of Daewoo Nexia, Chevrolet Lanos cars is gasoline, four-stroke, four-cylinder, in-line, eight-valve, with an overhead camshaft.
The A15SMS engine is located transversely in the engine compartment. The order of operation of the cylinders: 1-3-4-2, counting - from the auxiliary drive pulley.
A15SMS engine power system for Daewoo Nexia, Chevrolet Lanos - phased distributed fuel injection (Euro-3 toxicity standards).
The A15SMS engine of Daewoo Nexia, Chevrolet Lanos with a gearbox and clutch form a power unit - a single unit mounted in the engine compartment on three elastic rubber-metal supports.
The right support is attached to the bracket located on the front wall of the cylinder block, and the left and rear - to the gearbox housing brackets.
Fig.1. A15SMS engine for Daewoo Nexia, Chevrolet Lanos (rear view)
1 - oil drain plug; 2 - oil pan; 3 - flywheel; 4 - cylinder block; 5 - knock sensor; 6 - crankcase ventilation pipe; 7 - inlet pipe of the coolant pump; 8 - cylinder head; 9 - fuel pressure regulator; 10 - ignition coil; 11 - oil filler cap; 12 - intake manifold of the A15SMS engine of Daewoo Nexia, Chevrolet Lanos cars; 13 - idle speed regulator; 14 - throttle position sensor; 15 - rear cover of the timing drive; 16 - phase sensor; 17 - generator; 18 - generator drive belt; 19 - generator bracket; 20 - crankshaft position sensor; 21 - low oil pressure sensor; 22 - adsorber purge valve
On the right on the A15SMS engine of Daewoo Nexia, Chevrolet Lanos cars are located: timing drive of the gas distribution mechanism and coolant pump (toothed belt), generator and power steering pump drive (poly V-belt), air conditioning compressor drive (V-belt), oil pump, thermostat, sensor crankshaft position.
On the left are: the ignition coil and the coolant temperature sensor.
Fig.2. A15SMS engine for Daewoo Nexia, Chevrolet Lanos (left view)
1 - flywheel; 2 - cylinder block; 3 - catalytic converter; 4 - exhaust manifold; 5 - oil level indicator; 6 - cylinder head; 7 - coolant temperature sensor; 8 - ignition coil; 9 - oil filler cap; 10 - exhaust gas recirculation valve of the A15SMS Chevrolet Lanos engine; 11 - intake manifold; 12 - fuel pressure regulator; 13 - fuel rail; 14 - nozzle; 15 - adsorber purge valve; 16 - inlet pipe of the coolant pump
Fig.3. A15SMS A15SMS engine for Daewoo Nexia, Chevrolet Lanos (right view)
1 - oil pan; 2 - auxiliary drive pulley; 3 - oil drain plug; 4 - generator drive belt; 5 - lower cover of the timing drive; 6 - generator bracket; 7 - generator; 8 - tension bar of the generator drive belt; 9 - throttle assembly; 10 - recirculation valve; 11 - coolant temperature indicator sensor; 12 - oil filler cap; 13 - cylinder head cover; 14 - upper cover of the timing drive of the A15SMS engine of Daewoo Nexia, Chevrolet Lanos cars; 15 - power steering pump pulley; 16 - bracket for the right support of the power unit; 17 - catalytic converter; 18 - air conditioner compressor bracket; 19 - tension roller of the air conditioning compressor drive belt
Installed on the front of the A15SMS engine are: exhaust manifold, oil filter, oil level gauge, spark plugs, air conditioning compressor (bottom right).
At the back are: an intake manifold with a throttle assembly, a fuel rail with injectors, an exhaust gas recirculation valve, a generator, a starter, an insufficient oil pressure sensor, an adsorber purge valve, a phase sensor, a knock sensor, a coolant pump supply pipe, a coolant temperature indicator sensor.
A15SMS Engine Specifications
Model - A15SMS
Engine type - Gasoline, four-stroke, four-cylinder, in-line, eight-valve (SOHC)
Location - Front, transverse
Power system - Distributed fuel injection
Cylinder diameter / piston stroke, mm - 76.5x81.5
Chevrolet Lanos engine displacement, cm3 - 1498
Compression ratio - 9.5
Rated power kW (hp) at crankshaft speed, min–1 - 63 (86) / 5 800
Maximum torque Nm at crankshaft speed, min–1 - 130 /3 400
Fuel - Unleaded gasoline with an octane rating of at least 92
Ignition system - Electronic, part of the engine management system
Toxicity standards - Euro-3
The A15SMS cylinder block of Daewoo Nexia and Chevrolet Lanos cars is cast iron, the cylinders are bored directly in the block. The cooling jacket and oil channels are made in the body of the cylinder block.
In the lower part of the cylinder block there are five crankshaft main bearing supports with removable covers, which are attached to the block with special bolts.
Holes in the A15SMS cylinder block of Daewoo Nexia, Chevrolet Lanos cars for bearings are machined with caps installed, so the caps are not interchangeable and are marked on the outer surface with numbers (account from the timing pulley).
The A15SMS crankshaft of Daewoo Nexia, Chevrolet Lanos cars is made of high-strength cast iron, with five main and four connecting rod journals. The shaft is equipped with eight counterweights cast integrally with it.
Inserts of main and connecting rod bearings of the crankshaft are steel, thin-walled, with an anti-friction coating. The main and connecting rod journals of the crankshaft connect the channels located in the shaft body. The axial movement of the crankshaft is limited by two liners with thrust collars of the third main bearing.
At the front end (toe) of the A15SMS crankshaft of Daewoo Nexia, Chevrolet Lanos cars, the following are installed: a timing gear pulley and an auxiliary drive pulley.
A flywheel is attached to the crankshaft flange with six bolts. It is cast iron and has a pressed steel ring gear for starting the engine with a starter.
Connecting rods A15SMS for Daewoo Nexia, Chevrolet Lanos - forged steel, I-section. With their lower heads, the connecting rods are connected through liners to the connecting rod journals of the crankshaft, and with their upper heads - through piston pins with pistons.
Pistons - from an aluminum alloy. The hole for the piston pin is offset relative to the axis of symmetry of the piston by 0.7 mm to the rear wall of the cylinder block. Three grooves for piston rings are machined in the upper part of the piston. The two upper piston rings are compression rings, and the lower one is oil scraper.
Piston pins steel, tubular section. In the holes of the pistons, the fingers are installed with a gap, and in the upper heads of the connecting rods - with an interference fit (pressed).
The A15SMS cylinder head for Daewoo Nexia and Chevrolet Lanos is cast from aluminum alloy, common to all four cylinders. The head is centered on the block with two bushings and fastened with ten bolts.
Fig.4. Cylinder head A15SMS for Daewoo Nexia, Chevrolet Lanos (block head cover removed)
1 - camshaft; 2 - camshaft bearing housing
A gasket is installed between the block and the cylinder head of the Chevrolet Lanos. On the front side of the cylinder head are the exhaust ports, and on the rear side are the intake ports. The spark plugs are screwed into threaded holes in the cylinder head.
Seats and valve guides are pressed into the cylinder head of the A15SMS engine of Daewoo Nexia and Chevrolet Lanos. The valve closes under the action of one spring. Its lower end rests on a washer, and its upper end rests on a plate held by two crackers.
The crackers folded together have the shape of a truncated cone, and on their inner surface there are beads that enter the grooves on the valve stem. Actuates the valves on the camshaft.
The A15SMS camshaft of the Daewoo Nexia, Chevrolet Lanos cast iron cars rotates on five bearings (bearings) in an aluminum bearing housing, which is attached to the top of the cylinder head.
Camshaft drive Chevrolet Lanos - toothed belt from the crankshaft. The valves are actuated by the camshaft cams through pressure levers, which rest on the hydraulic clearance compensators with one shoulder, and on the valve stems through the guide washers.
Fig.5. Timing gear drive A15SMS for Daewoo Nexia, Chevrolet Lanos
1 - mark on the back cover of the timing drive; 2 - mark on the gear pulley of the crankshaft; 3 - a gear pulley of a cranked shaft; 4 - tension roller; 5 - toothed pulley of the coolant pump; 6 - belt; 7 - rear drive cover; 8 - mark on the back cover of the timing drive; 9 - mark on the camshaft pulley of the Chevrolet Lanos engine; 10 - camshaft pulley
The use of hydraulic compensators in the valve drive reduces the noise of the gas distribution mechanism, and also eliminates its maintenance.
A15SMS engine lubrication for Daewoo Nexia, Chevrolet Lanos - combined. Under pressure, oil is supplied to the main and connecting rod bearings of the crankshaft, pairs of "support - camshaft journal" and hydraulic compensators.
The pressure in the system is created by an oil pump with internal gears and a pressure reducing valve. The oil pump is attached to the cylinder block on the right side. The drive gear of the pump is mounted on two flats of the toe of the crankshaft.
The A15SMS internal combustion engine oil pump of Daewoo Nexia, Chevrolet Lanos cars takes oil from the oil pan through the oil receiver and delivers it through the oil filter to the main line of the cylinder block, from which oil channels depart to the crankshaft main bearings and the oil supply channel to the cylinder head.
The oil filter is full-flow, non-separable, equipped with bypass and anti-drain valves. By spraying, oil is supplied to the pistons, cylinder walls and camshaft lobes. Excess oil flows through the channels of the cylinder head into the oil pan.
The crankcase ventilation system of the Chevrolet Lanos engine is forced, closed type. The system is designed to reduce the emission of harmful substances from the engine crankcase into the atmosphere.
Due to the vacuum in the intake manifold, gases from the crankcase through the ventilation hose enter under the cylinder head cover.
After passing through the oil separator located in the block head cover, crankcase gases are cleaned of oil particles and enter the engine intake tract through the hoses of two circuits: the main and the idle circuit, and then into the cylinders.
Through the main circuit hose, crankcase gases are discharged at partial and full load modes of operation of the A15SMS internal combustion engine of Daewoo Nexia, Chevrolet Lanos cars into the space in front of the throttle valve.
Through the hose of the idle circuit, gases are discharged into the space behind the throttle valve, both in partial and full load modes, and in idle mode.
Information source Website: http://avtodvc.ru/shevrole_lanos_dvigatel_a15sms.html
- Forward
This is a gasoline, in-line "four", originally created for Euro-3, and which is a further development of the G15MF. Present in the line of 1.5-liter engines manufactured by Chevrolet.
Description
ATTENTION! Found a completely simple way to reduce fuel consumption! Don't believe? An auto mechanic with 15 years of experience also did not believe until he tried it. And now he saves 35,000 rubles a year on gasoline!
It was originally developed for the Chevrolet Lanos car. Structurally, the engine is built according to the in-line scheme, has a volume of 1.5 liters. The scheme of the GRS mechanism uses one camshaft - SOHC. Power supply - distribution injection MPI.
As a rule, the A15SMS engine forms a single power unit along with the gearbox and clutch. It is mounted in the engine compartment of the car on 3 elastic rubber-metal supports.
| Manufacturer | Chevrolet |
| ICE brand | A15SMS |
| Years of production | 1997 – 2015 |
| Volume | 1498 cm3 (1.5 l) |
| Power | 59-63 kW (80-86 HP) |
| Torque | 123 Nm (at 3200 rpm); 130 Nm (at 3400 rpm) |
| Weight | 117 kg |
| Compression ratio | 9.5 |
| Nutrition | injector |
| motor type | in-line petrol |
| Ignition | switching, non-contact |
| Number of cylinders | 4, bored inside the block without liners |
| Location of the first cylinder | TVE |
| Number of valves per cylinder | 2 |
| Cylinder head material | aluminum alloy |
| Intake manifold | duralumin |
| An exhaust manifold | cast iron |
| camshaft | 5 supports, casting, cast iron |
| Block material | cast iron |
| Cylinder diameter | 76.5 mm |
| Pistons | dural, the finger hole is shifted by 0.7 mm to the rear wall |
| Crankshaft | cast iron, 8 counterweights, 5 supports |
| piston stroke | 81.5 mm |
| Fuel | AI-92 |
| Environmental standards | Euro 3 |
| Fuel consumption | highway - 5.4 l / 100 km; combined cycle 7.6 l / 100 km; city - 9.8 l / 100 km |
| Oil consumption | maximum 0.6 l/1000 km |
| What kind of oil to pour into the engine by viscosity | 5W30, 5W40, 0W30, 0W40 |
| Which oil is best for the engine by manufacturer | Liqui Moly, LukOil, Rosneft |
| Oil for A15SMS by composition | Synthetic in winter, semi-synthetic in summer |
| Engine oil volume | 4.5 l |
| Operating temperature | 95° |
| ICE resource | claimed 250,000 km; real 350,000 km |
| Adjustment of valves | hydraulic lifters |
| Cooling system | forced, antifreeze |
| coolant volume | 10.7 l |
| water pump | with plastic impeller |
| Candles on A15SMS | BCPR6ES from NGK or domestic AU17DVRM |
| spark plug gap | 1.1mm |
| timing belt | Gates, width 22 mm, resource 200,000 km |
| The order of operation of the cylinders | 1-3-4-2 |
| Air filter | Nitto, Knecht, Fram, WIX, Hengst |
| Oil filter | with check valve |
| Flywheel | with clutch bore diameter 200 mm or 215 mm |
| Flywheel mounting bolts | M12x1.25 mm, length 26 mm |
| Valve stem seals | manufacturer Goetze, inlet light |
| graduation dark | |
| Compression | from 13 bar, difference in neighboring cylinders max. 1 bar |
| Turnover XX | 750 – 800 min-1 |
| Tightening torque for threaded connections | candle - 31 - 39 Nm; flywheel - 62 - 87 Nm; clutch bolt - 19 - 30 Nm; bearing cap - 68 - 84 Nm (main) and 43 - 53 (connecting rod); cylinder head - three stages 20 Nm, 69 - 85 Nm + 90° + 90° |
Technical features
It is customary to distinguish some features of the engine.
- Oil passages and refrigerant passages are molded inside the block.
- The cylinders of the unit do not have conventional liners, but are bored inside a cast-iron block - the honing method is used.
- The cylinder head with two bushings is fastened with ten bolts.
- The engine rests on 3 pillows - thanks to this, the center of mass is distributed, and vibrations are effectively damped.
- Fuel injection is phased.
- The pump and other components rotate with a V-belt, and the power steering and generator with a V-ribbed belt.
- The toothed belt drives the overhead timing gear camshaft and pump.
- Hydraulic compensators are used, for the normal functioning of which, it is necessary to fill in high-quality oil.
- The engine uses two catalysts and an oxygen sensor.
Other features.
- Coils are installed above the flywheel, on the left in the direction of travel. The ignition system is called DIS-2.
- On the front surface of the engine are the exhaust manifold, oil filter and spark plugs.
- A generator, an intake manifold and a purge valve are installed on the rear surface of the power unit.
- The cylinder head cover is plastic with a gasket of complex shape.
- The design of the unit is simple, it is possible to carry out independent modernization and overhaul.
| Engine elements | Description |
| Cylinder block | The block is cast iron, and the cylinders are bored directly into the block itself. The cooling jacket and lubrication channels are carried out inside the BC body. The lower zone of the block includes 5 main crankshaft bearings with removable covers fixed to the BC with special bolts. |
| Crankshaft | Made of ductile iron, with 5 main and 4 crankpins. 8 counterweights are placed on the shaft, cast integrally with the crankshaft. The crankshaft liners are thin-walled, but steel, durable, with an anti-friction coating. Special thrust bearings limit the axial movement of the crankshaft. A flywheel cast from cast iron is fixed to the crankshaft flange. It has a pressed steel crown that engages well with the starter. |
| camshaft | The A15SMS engine uses a cast iron camshaft that rotates on 5 supports (bearings). The camshaft drive is a toothed belt that connects the part to the crankshaft. |
| connecting rods | A15SMS forged steel I-section connecting rods. They are connected to the connecting rod journals through the liners with their lower heads, and the upper ones - with the pistons, through the fingers. |
| Pistons | Pistons are made of aluminum alloy. The hole for the finger is offset relative to the axis by 0.7 mm to the rear wall of the cylinder block. 3 grooves for rings are made in the upper part of the piston. 2 rings are put on the rings from above - compression, and 1 from below - oil scraper. The piston pins are steel, tube-shaped. In the holes of the pistons, they are installed with a gap, and in the upper heads of the connecting rods - with an interference fit, that is, they are pressed in. |
| cylinder head | The head is made of aluminum alloy, it is common to all engine cylinders. The cylinder head is centered on the block with 2 bushings and fixed with 10 bolts. Sealing gasket of complex shape. The exhaust ports are located on the front of the cylinder head, and the intake ports are on the back. The spark plugs are screwed into the threaded holes in the cylinder head. |
| Oil pump | Takes oil through the oil receiver from the oil pan. Then, through the oil filter, it enters the main line of the cylinder block, from which the oil channels depart to the main bearings of the crankshaft. |
| Oil filter | Full-flow, non-separable, equipped with bypass and anti-drainage valves. By spraying, oil is supplied to the pistons, cylinder walls and camshaft lobes. Excess oil flows through the channels of the cylinder head into the oil pan. |
| Crankcase ventilation system | Forced, closed type. The system is designed to reduce the emission of harmful substances from the engine crankcase into the atmosphere. |
What cars was installed
At first, the engine created by Chevrolet designers was installed on the Lanos car. Then the engine began to be installed on other models.
- The Lanos sedan is the successor to the Chevrolet.
- Hatchback and sedan Nexia.
- Front-wheel drive C-class car Nubiru with different body types.
Daewoo Nexia A15SMS has been installed only since 2008, when restyling was carried out, and the environmental standards of previous engines did not reach the Euro-3 standard. And on the new engine, some elements of the standard design have been changed, and it fits perfectly.
Also, much later, it was installed in the Opel Kadett E, which had different names (a marketing ploy).
Modification A15DMS
A15DMS is a 1.5 liter version of the engine with 2 camshafts and 16 valves. This modification develops 107 hp. With. Consider in detail the features of this engine.
- The design of the engine is in-line.
- GDS DOHC scheme - implies the use of 2 camshafts.
- The power system is similar - it's MPI.
- Compared to the A15SMS, different attachments are installed, although many parts are interchangeable.
Advantages and disadvantages of the A15SMS engine
Experts highlight the following advantages of atmospheric internal combustion engines:
- reliability - the engine can run 300 thousand kilometers or more without major repairs;
- simplicity of design, which does not include complex mechanisms and components;
- the presence of hydraulic compensators, which saves the car owner from the periodic adjustment of the valves - everything happens automatically;
- lightness and compactness of the power unit - the “four” A15SMS can be pulled out and installed by hand, without the use of professional equipment.
As for the shortcomings, there still remains a problem with the design of the cylinder head. Due to the fact that the piston does not have welded studs, the valves bend when the timing belt breaks. In addition, due to Euro-3 regulations, the designers had to narrow the exhaust by installing an EGR valve and adding a DPRV, as well as a knock controller. This had a negative impact on the main technical parameters - power fell, torque decreased.
Service (regulation)
Consumables and working fluids must be replaced with A15SMS according to the following plan.
- After 7 thousand kilometers - change the oil and filter.
- Every 15 thousand kilometers - timing belts and attachments.
- After 20 thousand kilometers - purging or flushing the crankcase and ventilation holes, replacing spark plugs.
- After 30 thousand kilometers - control over hydraulic lifters.
- After 40 thousand km - replacing the fuel filter, updating the coolant.
- After 60 thousand kilometers - check the intake manifold for burnout.
Main malfunctions
The A15SMS engine has several characteristic "sores" that owners need to be aware of. In general, he can easily be repaired with his own hands, although this is not cheap.
- IAC - the idle speed sensor is subjected to stress, and often fails prematurely. Due to the breakdown of the regulator, high idle speeds “hang”. The problem is corrected by replacing the element with a new sensor.
- Oil scraper rings have the property of "overlapping". Because of this, oil consumption increases. It is recommended to replace the rings or decoke them.
- Spark plugs wear out and need to be replaced.
- The fuel system due to low-grade gasoline quickly becomes clogged. Therefore, it is necessary to clean the nozzles, tubes in a timely and regular manner and change the pump if necessary.
- The air damper also tends to get clogged. You need to clean the throttle.
Modernization
Engine tuning includes various operations to improve performance. In A15SMS, it is more useful to work with the cylinder head first - as mentioned above, due to a broken belt, the valves are damaged.
First of all, the following cycle of events is carried out for this.
- The factory cylinder head is changing - it is installed from the Daewoo Nexia N100.
- Valves are replaced with elements with a lower lift height. True, for this it is necessary to replace some elements of the engine.
The classic atmospheric tuning for the A15SMS engines also includes the refinement of the intake tract. The best solution is to put a sports Borman Receiver Inteik. It costs about 400-500 dollars. This receiver will help improve the dynamics on the bottoms, increase the agility of the engine, add traction at high speeds. And if you add a large fuel rail costing $ 100-200, you can significantly increase the technical characteristics of the power unit.
In the Chevrolet range of 1.5 liter engines, the A15SMS engine was originally created to Euro-3 environmental standards, so it was immediately identified as the Daewoo Nexia power drive, the two previous engines of which, A15MF / F15MF, could not be finalized to this standard.
Specifications A15SMS 1.5 l/80-86 l. With.
Initially, the internal combustion engine was developed for Chevrolet Lanos. The A15SMS marking in the engine is completely informative:
- A - in-line engine diagram;
- 15 - volumes of combustion chambers 1.5 l;
- S - diagram of the SOHC gas distribution mechanism with one overhead camshaft;
- M - MPI type power supply system;
- S - compression ratio in the range of 9.5 - 10 units.
The A15SMS power drive got to Daewoo Nexia only in 2008 after restyling, when the environmental friendliness of the previous G15MF / A15MF engines ceased to meet the manufacturer's requirements, that is, it did not reach the Euro-3 standard.
Technical characteristics of A15SMS are collected in a special table:
| Manufacturer | Chevrolet |
| ICE brand | A15SMS |
| Years of production | 1997 – 2015 |
| Volume | 1498 cm3 (1.5 l) |
| Power | 59-63 kW (80-86 HP) |
| Torque | 123 Nm (at 3200 rpm) 130 Nm (at 3400 rpm) |
| Weight | 117 kg |
| Compression ratio | 9,5 |
| Nutrition | injector |
| motor type | in-line petrol |
| Ignition | crambler |
| Number of cylinders | 4, bored inside the block without liners |
| Location of the first cylinder | TVE |
| Number of valves per cylinder | 2 |
| Cylinder head material | aluminum alloy |
| Intake manifold | duralumin |
| An exhaust manifold | cast iron |
| camshaft | 5 supports, casting, cast iron |
| Block material | cast iron |
| Cylinder diameter | 76.5 mm |
| Pistons | dural, the finger hole is shifted by 0.7 mm to the rear wall |
| Crankshaft | cast iron, 8 counterweights, 5 supports |
| piston stroke | 81.5 mm |
| Fuel | AI-92 |
| Environmental standards | Euro 3 |
| Fuel consumption | highway - 5.4 l / 100 km combined cycle 7.6 l/100 km city - 9.8 l / 100 km |
| Oil consumption | maximum 0.6 l/1000 km |
| What kind of oil to pour into the engine by viscosity | 5W30, 5W40, 0W30, 0W40 |
| Which oil is best for the engine by manufacturer | Liqui Moly, LukOil, Rosneft |
| Oil for A15SMS by composition | synthetic, semi-synthetic |
| Engine oil volume | 4.5 l |
| Operating temperature | 95° |
| ICE resource | claimed 250,000 km real 350,000 km |
| Adjustment of valves | hydraulic lifters |
| Cooling system | forced, antifreeze |
| coolant volume | 10.7 l |
| water pump | with plastic impeller |
| Candles on A15SMS | BCPR6ES from NGK or domestic AU17DVRM |
| spark plug gap | 1.1mm |
| timing belt | Gates, width 22 mm, resource 200,000 km |
| The order of operation of the cylinders | 1-3-4-2 |
| Air filter | Nitto, Knecht, Fram, WIX, Hengst |
| Oil filter | with check valve |
| Flywheel | with clutch bore diameter 200 mm or 215 mm |
| Flywheel mounting bolts | M12x1.25 mm, length 26 mm |
| Valve stem seals | manufacturer Goetze |
| Compression | from 13 bar, difference in neighboring cylinders max. 1 bar |
| Turnover XX | 750 – 800 min-1 |
| Tightening torque for threaded connections | candle - 31 - 39 Nm flywheel - 62 - 87 Nm clutch bolt - 19 - 30 Nm bearing cover - 68 - 84 Nm (main) and 43 - 53 (connecting rod) cylinder head - three stages 20 Nm, 69 - 85 Nm + 90° + 90° |
A detailed description of the parameters contains the manufacturer's manual, since for Lanos, Nexia and Nubira, the torque and power may differ. On the other hand, on engines “muted” for the sake of Euro-3/4, the user always increases the power on his own by reinstalling the software version for the on-board computer.
Design features
After improvements to previous versions of the A15MF / G15MF, the A15SMS engine received design nuances:
- cylinders are bored inside a cast-iron block without sleeves, the mirror is honed;
- lubrication and antifreeze channels are molded inside the block;
- the cylinder head is fastened with 10 bolts, has two guide bushings;
- injection is distributed in phases, the intake manifold has a variable geometry;
- three pillows distribute the center of mass, dampen vibrations;
- attached equipment rotates with one V-belt - an air conditioning compressor, with another poly-V-belt - power steering and a generator;
- the upper timing camshaft and pump are driven by a toothed belt;
- exhaust manifold, oil filter and candles are located on the front surface of the engine;
- the intake manifold, generator and purge valve are arranged on the rear of the internal combustion engine;
- the modernization of the motor provided self-regulation of the supports with hydraulic compensators, for the operation of which high quality oil is required;
- a feature of the cylinder head is a plastic cover with a rubber seal of complex configuration;
- thanks to the simple design of the motor with your own hands, it is possible to force and overhaul the cylinder head or block.
The user manual included with the Daewoo/Chevrolet vehicle documentation contains illustrations that make it easier to independently overhaul the power drive.
List of engine modifications
There is a version of the 1.5 liter engine with two camshafts and 16 valves A15DMS with a capacity of 107 hp. With.:
- A - cylinders are arranged in a row;
- 15 - 1.5 l ICE volume;
- D - diagram of the gas distribution mechanism DOHC 16V with two overhead camshafts;
- M - MPI power supply system;
- S is a compression ratio between 9.5 and 10 units.
Other attachments are installed here, but some spare parts are interchangeable (SHPG, crankshaft, block).
Advantages and disadvantages
The main advantages of an atmospheric in-line 4-cylinder engine are:
- simplified ICE device without complex mechanisms/assemblies;
- high operational resource from 300 thousand run;
- hydraulic lifters save the car owner from adjusting thermal gaps after 30 thousand km;
- the engine is compact and lightweight, it can be pulled out and installed without a hoist by hand.
The main disadvantage is the design of the cylinder head - the piston does not have a counterboring, the valve bends when the drive belt breaks.
List of car models in which it was installed
Since the A15SMS motor was created by Chevrolet designers, at first it was equipped with the Lanos model. Then the characteristics of the engine interested the manufacturer Daewoo, who urgently needed an engine with guaranteed compliance with Euro-3 standards. The A15SMS atmospheric in-line four was installed on three Daewoo cars:
- Lanos - a sedan, the successor to the Chevrolet of the same brand;
- Nexia is the company's most popular hatchback and sedan;
- Nubira is a front-wheel drive C-class car in all body styles.
The engine was later used in the Opel Kadett E, which went by different names for different markets.
Service Schedule A15SMS 1.5L/80-86L. With.
It is necessary to replace the consumable parts and elements included in the A15SMS engine, working fluids in the following order:
- attachment / timing belts will be replaced after 50,000 km;
- thermal valve clearances must be adjusted at the turn of 30 thousand mileage;
- the manufacturer provides for purge / flushing of the crankcase ventilation every 20 thousand km;
- Daewoo manufacturer recommends changing the engine oil/filter after 7,500 km;
- it is recommended to update the fuel filter after 40 thousand mileage;
- according to the manufacturer, change the air filter annually;
- after packing the coolant from the factory, antifreeze loses its effectiveness after 40 thousand km;
- the resource of engine candles is 20 thousand mileage;
- the intake manifold starts to burn through after 60,000 km.
The belt and oil are the main consumables here, the quality of which determines the performance of the power drive.
Overview of faults and how to fix them
The A15SMS atmospheric in-line motor with a single-shaft head has several "diseases":
The engine can hardly be called economical, but it is easily repaired on its own, it does not cause problems for the owner.
Motor tuning options
Classic atmospheric tuning for Lanos / Nexia engines usually consists in improving the input tract. There's a ready-made solution, a $400 Borman Receiver Intake sport-style intake manifold. This receiver can be used alone to improve low-end dynamics, confident overtaking maneuvers, and add power at high revs. When the power unit is turbocharged, an increased $100 fuel rail is added to the receiver package.
Thus, the A15SMS motor initially complies with the Euro-3 regulations. The engine develops a torque of 130 Nm and a power of 86 hp. With. with a volume of combustion chambers of 1.5 liters. The eight-valve head is inferior in efficiency to the 16-valve counterpart, but it is more compact, more reliable and simpler in design.
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Daewoo Nexia is one of the few cars that have been on domestic roads for over 20 years. Its prototype was the popular sedan Opel Kadett modernized in 1995. Over the years, the Nexia DEU engine was represented by models:
Specifications F16D3
| PARAMETER | MEANING |
|---|---|
| Volume of cylinders, cu. cm. | 1598 |
| Power, l. s / about. in min. | 106/6000 |
| Torque, Nm/rev. per minute | 142/4000 |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Cylinder diameter, mm | 79 |
| Piston stroke, mm | 81.5 |
| Compression ratio | 9.5 |
| Supply system | Distributed fuel injection with electronic control |
| Gas distribution mechanism | DOHC 16V |
| Fuel | Unleaded gasoline A-95 |
| Fuel consumption, l/100 km (city) | 7.3 |
| Lubrication system | Combined (spray + under pressure) |
| Engine oil type | Quality level SG/CC or higher: SAE 5W-30, 10W-40, 15w-40 |
| Engine oil volume | 3.75 l |
| Cooling system | Closed type with forced coolant circulation |
| Coolant | Based on ethylene glycol |
| Environmental regulations | EURO - 3 |
The F16D3 engine was installed on Daewoo Lanos, Nexia, Lacetti cars; ; ZAZ Chance.
Description
All power units that have ever been installed on a Nexia DEU are a classic four-stroke internal combustion engine with 4 cylinders arranged in one row.
The design of the cylinder block is identical. Their lubrication and cooling systems are also built according to the same scheme.
Initially, only the G15MF engine was installed on the Daewoo Nexia, which practically copied the Opel Kadett E engine, but instead of a carburetor, it used a distributed injection system with the simultaneous activation of all nozzles.
The gas distribution mechanism (GRM) was made according to a single-shaft scheme (SOHC 8V) with an overhead camshaft. There was also no catalytic converter and lambda probe.
Subsequently, the number of valves was increased to 16 and a two-shaft timing was used. In addition, the ignition system has been fundamentally changed. The motor after these changes significantly increased power and was labeled A15MF.
In addition, both power units began to be equipped with a lambda probe and a catalytic converter, which allowed them to comply with the requirements of the EURO - 2 standard.
In connection with the introduction of the EURO-3 environmental standard, the Nexia Daewoo engines (G15MF, A15MF) were discontinued and replaced by A15SMS and F16D3 engines:
- A15SMS
It is the fruit of further modernization of the base G15MF engine, in which a number of changes have been made to improve environmental performance:
- the number of information elements of the engine management system has been increased, including sensors: camshaft position and detonation;
- instead of the ignition distributor sensor, the ignition module is used;
- the geometry of the inlet pipeline has been changed;
- two catalytic converters of exhaust gases are mounted;
- two oxygen concentration sensors are installed.
- F16D3
An upgraded version of the F14D3 engine with a twin-shaft 16-valve timing belt DOHC 16V overhead and a CVCV (Continuonus Variable Camshaft phasing) phase control system. The engine is also equipped with an electronic exhaust gas recirculation (EGR) control system.
The new b15d2 power unit differs from the rest in a more efficient engine control unit, a redesigned ignition coil, etc. All this, along with the use of an improved timing belt with a chain drive and electronic control of variable valve timing, has significantly increased power and reliability, as well as improved a number of technical motor characteristics.
Maintenance
Maintenance of engines that were installed on Daewoo Nexia is carried out in accordance with the maintenance plan.
True, if the car is operated in harsh driving conditions (dust, off-road, extreme driving, etc.), then it is advisable to carry out maintenance more often.
During scheduled maintenance of the car, it is recommended to monitor the condition of the power unit. At the same time, it is mandatory to carry out:
- replacement of engine oil;
- checking the tightness of all hoses, pipes and pipelines;
- control of the tightening torque of the cylinder head bolts;
- diagnostics of the electronic control system of the power unit;
- replacement of filters (oil and fuel);
- inspection of the air filter and, if necessary, its cleaning or replacement.
An important place in this list is occupied by a responsible (but simple) engine oil change procedure, which can be performed both at a service station and on your own.
Its peculiarity lies in the fact that, for example, changing the Matiz oil is no different from changing the oil of any other Daewoo brand car. It is only important to determine where they are located:
- oil filler neck;
- drainer;
- oil filter.
The volume of oil to be filled into a particular engine is indicated in the technical or reference documentation.
In addition, during maintenance after each:
- 30 thousand kilometers or 1 time in 3 years, it is necessary to replace the air filter;
- 40 thousand km or 1 time in 4 years they replace: coolant and brake fluid; replacement of the drive belt and timing rollers.
Note: in the b15d2 engine, the timing chain is changed only if it is overstretched.
Faults
The engines installed on Daewoo Nexia vehicles have a number of characteristic faults (disadvantages). Among them:
| FAULTS | CAUSES | SOLUTIONS |
|---|---|---|
| High oil consumption | Oil leak from the engine. Broken or worn piston rings. Dirty or worn oil pump. | Tighten bolts and/or replace sealing elements. Replace defective piston rings. Replace oil pump. |
| Momentary knocking in the engine immediately after starting. | Malfunction of hydraulic pushers of timing valves. Increased axial clearance of the crankshaft. Increased clearance in the front main bearing. | Check, clean and, if necessary, replace the tappets. Replace shaft bearing. Replace worn parts. |
| Loud knocking sound on warm engine. | Loose torque converter mounting bolts. Tightened drive belts. Increased clearances in main bearings. | Tighten the bolts. Adjust the tension belts or replace them with serviceable ones. Replace main bearing shells. |
Other malfunctions may occur in Nexia engines, which are best fixed in service stations.
tuning
Serious tuning of the engines of the Daewoo Nexia is carried out infrequently. This is largely due to the high complexity of the work on the manufacture and installation of new parts and assemblies. Necessary:
- Install camshafts with high valve lift.
- Sand the intake manifold.
- Boring cylinders for large piston sizes.
- Install the supercharger (compressor) and controller.
- Install a large capacity exhaust manifold and straight-through muffler.
- In addition, we need forged pistons and connecting rods, a lightweight flywheel, a more powerful timing, etc.
After completing the work, it is necessary to reflash the electronic engine control unit. Proper reconfiguration of the electronics in the presence of an installed supercharger will increase the power of the atmospheric motor from 10 to 25%, while increasing the torque by 10 - 20%.
Chevrolet Lanos 1.5 engine liters with a capacity of 86 horsepower is essentially a development of Opel engineers. This is a gasoline aspirated from the A15SMS series, which can be found on Daewoo Nexia. A simple and reliable 8-valve engine has a number of design features, which we will discuss in more detail. 
Chevrolet Lanos 1.5 engine device
Engine Lanos 1.5 gasoline, four-stroke, four-cylinder, in-line, eight-valve, with an overhead camshaft. The location in the engine compartment is transverse. The order of operation of the cylinders: 1-3-4-2, counting - from the auxiliary drive pulley. Power system - phased distributed fuel injection (Euro-3 toxicity standards). The motor has a cast iron cylinder block.
An engine with a gearbox and a clutch form a power unit - a single unit, fixed in the engine compartment on three elastic rubber-metal supports. The right support is attached to the bracket located on the front wall of the cylinder block, and the left and rear - to the gearbox housing.
Cylinder head of Chevrolet Lanos 1.5 engine
The cylinder head of the Chevrolet Lanos 8 valves is cast from aluminum alloy, common to all four cylinders. The head is centered on the block with two bushings and fastened with ten bolts. A gasket is installed between the block and the cylinder head.
On opposite sides of the cylinder head are the intake and exhaust ports. Seats and valve guides are pressed into the cylinder head. The valve closes under the action of one spring. Its lower end rests on a washer, and its upper end rests on a plate held by two crackers. The crackers folded together have the shape of a truncated cone, and on their inner surface there are beads that enter the grooves on the valve stem. Actuates the valves on the camshaft. The cast iron camshaft rotates on five supports (bearings) in an aluminum bearing housing that is attached to the top of the cylinder head.
Timing drive engine Chevrolet Lanos 1.5
The camshaft drive of the 8-valve Lanos engine is carried out by a toothed belt from the crankshaft. The valves are actuated by the camshaft cams through pressure levers, which are supported by one shoulder on the hydraulic clearance compensators, and by the other shoulder through the guide washers - on the valve stems.
The engine has hydraulic lifters, which are self-adjusting pressure lever supports. Under the influence of oil filling under pressure the internal cavity of the compensator, the compensator plunger selects the clearance in the valve actuator. The use of hydraulic compensators in the valve drive reduces the noise of the gas distribution mechanism, and also eliminates its maintenance.
In the event of a break in the valve belt, it bends unambiguously! Among other features, it can be noted that the timing belt rotates the pump (water pump). The belt is replaced every 60 thousand kilometers, the pump must be changed every 120 thousand kilometers.
Technical characteristics of the engine Lanos 1.5 8 valves
- Working volume - 1498 cm3
- Number of cylinders - 4
- Number of valves - 8
- Cylinder diameter - 76.5 mm
- Stroke - 81.5 mm
- Timing drive - belt
- HP power - 86 at 5800 rpm. in min.
- Torque - 130 Nm at 3400 rpm. in min.
- Maximum speed - 172 km / h
- Acceleration to the first hundred - 12.5 seconds
- Fuel type - gasoline AI-92
- Fuel consumption in the city - 10.4 liters
- Combined fuel consumption - 6.7 liters
- Fuel consumption on the highway - 5.2 liters
Chevrolet Lanos, also known as Daewoo Lanos, was produced in huge quantities in Korea, China, India, Poland, Ukraine ... often the model could have different names, but structurally it is the same budget car.
