A series of Toyota AZ engines - operates on gasoline fuel. to the engine 1AZ-FE a large number of modern technologies were used: inclined combustion chambers “Squish”, VVT-i system, Forged steel crankshaft, balancing of which was carried out using eight counterweights and supported by five bearings. Engine dimensions: 626*608*681 mm.
The engine design includes the following main elements:
- 4 cylinders arranged in a row;
- Aluminum cylinder block;
- Cast iron sleeves;
- Aluminum cylinder head;
- Two camshafts.
Engine installations have replaced the S series in the production of Toyota cars. At the moment, the AZ line is planned to be replaced by AR.
More about 1AZ FE
The 1AZ-FE engine displacement is 2 liters. The power parameter is at the level of 145 hp, and the torque is 190 Nm for the motor, which is installed in the Camry / Aurion. Motor units for RAV4 and Ipsum are capable of developing 150 hp. and a torque of 193 Nm. The compression ratio is 9.6:1. The cylinder diameter and piston stroke are the same and equal to 86 mm.
The installation of the power plant was carried out on the following cars:
- Toyota Camry (From 2006 to 2009).
- Toyota RAV4 (From 2001 to 2003).
- Toyota RAV4 Second generation (from 2003 to 2006).
- Toyota Picnic /Avensis-Verso (From 2001 to 2009).
Malfunctions and repair of the 1AZ-FE / FSE engine
The AZ engine line, from Toyota, was born in 2000. She replaced the S series, which was very popular in the automotive world and has established itself as a family of reliable and easy to maintain engines. The new line was distinguished by the presence of a lightweight aluminum cylinder block, a VVT-i gas distribution system located on the surface of the exhaust shaft, a direct fuel injection system that reduces the load on the liners, as well as a displacement of the cylinder axis in relation to the crankshaft axis.
Also implemented the use of electronic throttle. The engine marked 1AZ-FE / FSE was created to replace the popular 3S-FE / FSE engine. However, unlike him, 1AZ-FE / FSE has a small number of options.
Toyota 1AZ engine modifications
- 1AZ-FE - this motor is the base one, the production of which began in 2000. The compression ratio can be from 9.6 to 9.8. The developed power reaches 150 hp.
- 1AZ-FSE - Second modification. This engine is an analogue of the 1AZ-FE, however, it uses a direct fuel injection system. Different modifications have different compression ratios: 9.8, 10.5 and 11. It is capable of developing power from 150 to 155 horsepower.
1AZ malfunctions and their causes
- Disruption of the threaded connection, with the help of which the cylinder head is fastened to the cylinder block. This is the main problem of all motor units from the AZ line. Signs of this malfunction: the rear wall of the cylinder block is contaminated with antifreeze, significant engine overheating, geometry is lost. This defect was eliminated in 2007, when this version was restyled, so it is enough for owners of old units to replace the old cylinder block with an updated one.
- Vibration while the engine is idling. The appearance of this disadvantage is observed when the engine rotation is 500-600 rpm. This does not allow car owners to live in peace. Vibration cannot be completely eliminated. Replacing injectors, throttle, mass air flow sensor, EGR system (if equipped), as well as cleaning and checking and idle valves are almost useless operations.
- The 1AZ engine rig twitches. It is necessary to clean the block where the throttle valve is located, remove carbon deposits from the surfaces of the intake manifold and its dampers. In general, the power plant is prone to the formation of soot on all surfaces, so cleaning all elements can help in the presence of engine shocks. If, after removing the carbon deposits, the malfunction remains, then you need to watch the operation of the VVTI system and the lambda probe. These engines were equipped with an EGR system, in the cavities of which carbon deposits are also possible, as a result of which the speed begins to float, power is lost and, in general, the engine begins to respond to signals from the controls for a long time.
To eliminate this defect, it is necessary to install a plug of this valve. Overheating of the motor can lead to serious consequences, as a result of which it will be necessary to replace it with a contract engine. Also in this case the geometry is lost. When using low-quality fuel, it is very likely that FSE (D4) owners will have to replace the high pressure fuel pump and injectors.
- the cost of these spare parts is very high. The gas distribution mechanism of the power plant is reliable. On average, its resource is 200 thousand km, without repair work. The power plant in most cases overcomes the mark of 300 thousand km without major repairs, despite the fact that the block is disposable;
- The engine can serve the owner well if maintained well and good consumables are used. This motor has become an example for creating a 2AZ engine with a large volume of 2.4 liters. The ZT series began to be applied in 2007. The 3ZR version gradually replaced the 1AZ engine.
Tuning engine Toyota 1AZ-FE
It is possible to modify the engine into a 2.4-liter 2AZ unit. However, this operation will require a very large financial investment. Consider the implementation of the most relevant option for increasing power characteristics - turbocharging.
Compressor
The production of ready-made compressors for AZ engines is carried out by Blitz and TRD. Therefore, it is enough for the owner to purchase and install the compressor. Also, for its normal functioning, the design must be supplemented with the following elements:
- intercooler;
- blowoff;
- thick cylinder head lining;
- nozzles, the performance of which is 440cc;
- Walbro 255 pump.
It is also necessary to remove the catalyst or replace it with a direct-flow type exhaust, with a diameter of 63 mm. After that, you need to configure Greddy E-manageUltimate to get 200 hp. without changing the piston system. It is possible to leave the native engine management system, but the dynamic performance will be much worse.
We bring to your attention the price list for a contract engine (without mileage in the Russian Federation) 1AZ-FE
A distinctive feature of the FSE engine brand is the direct supply of fuel to the combustion chambers. Such units did not please the fighters for a green planet. Due to the lean mixture in the cylinders, a large amount of emissions can be traced. To reduce them, the Japanese had to work hard and take on new developments. So the 1AZ-FSE engine boasts an acceptable amount of emissions.
To interest users with a novelty, the developers called their technology "D-4", which stands for direct injection (D) and 4 cylinders. Later, the motor began to be called 1AZ-FSE. If we analyze the classification of Toyota cars, the presented name stands for:
- 1 – serial number;
- A - a series of engines;
- Z - on gasoline;
- F - standard power range;
- S - direct injection of gasoline;
- E - electronic multipoint injection.
Specifications
| Production | Kamigo Plant Shimoyama Plant |
| Engine brand | 1AZ |
| Release years | 2000-present days |
| Block material | aluminum |
| Supply system | injector |
| Type | in-line |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 86 |
| Cylinder diameter, mm | 86 |
| Compression ratio | 9.6 9.8 10.5 11 |
| Engine volume, cc | 1998 |
| Engine power, hp / rpm | 145/6000 150/5700 150/6000 152/6000 |
| Torque, Nm/rpm | 190/4000 193/4000 193/4000 200/4000 |
| Fuel | 95 |
| Environmental regulations | Euro 5 |
| Engine weight, kg | 131 |
| Fuel consumption, l/100 km (for RAV4 XA20) - city - track - mixed. |
11.4 7.3 9.8 |
| Oil consumption, g/1000 km | up to 1000 |
| Engine oil | 0W-20 5W-20 |
| How much oil is in the engine | 4.2 |
| Oil change is carried out, km | 10000 (preferably 5000) |
| Operating temperature of the engine, hail. | - |
| Engine resource, thousand km - according to the plant - on practice |
n.a. 300+ |
| tuning - potential - no loss of resource |
200+ n.a. |
| The engine was installed | Toyota Avensis Toyota Caldina Toyota Camry Toyota RAV4 Toyota Vista Toyota Premium Toyota Avensis Verso Toyota Noah/Voxy Toyota Gaia Toyota Isis Toyota Wish Toyota Allion Toyota Opa |
Advantages and disadvantages
The key advantage of the 1AZ-FSE is the optimum fuel consumption. At the same time, the presented motor gives good characteristics. Every consumer will feel the power on the road. Not from the lowest revs, you can count on traction and fast acceleration. But on the track, the power unit will not disappoint, as if it was created for high-speed driving. However, even this advantage is offset by a number of disadvantages that 1AZ-FSE has. Let's consider the main ones:
- lack of repair dimensions, without which it is impossible in conditions of poor road surfaces;
- to restore the operation of the engine, it is necessary to change parts in whole units. Repair becomes costly;
- a consumable item that quickly and often fails is the fuel pump and 1AZ-FSE injectors. At the same time, their cost is impressive;
- installation of HBO is impossible, because there are many risks and all because of the plastic intake manifold.
After evaluating all these points, each owner realizes that engine repairs can cost him a significant amount. The main problem with the 1AZ-FSE is that it doesn't like high revs. At the same time, the power of the product can only be estimated at 4000 rpm.
Which car models are equipped with 1AZ-FSE?
1AZ-FSE D-4 is most often found on Avensis and Rav-4 models<, но это только на нашей территории. А вот в той же Японии или США представлены модели авто, укомплектованные им. Рассмотрим самые популярные модели, где встречается этот силовой агрегат: Noah, Voxy, RAV-4, Premio, Wish, Caldina.
Despite the existing shortcomings, the 1AZ-FSE remains a popular engine among Japanese car owners. The supply of fuel directly to the unit affects its operation, the quality of gasoline is important, and only then all the other components. Therefore, in the CIS countries, the number of negative reviews about the unit is growing and this is far from due to its design feature, but to fuel.
3S and 1AZ-FSE the main differences between the units
the new development is characterized by the presence of an aluminum cylinder block, an Open Deck cooling system. It provides cooling by coating the cylinders with coolant. In the process of casting, the developers managed to abandon the sand cores. The process is gradually transferred to injection molding.
To minimize the friction of the piston against the cylinder walls, the developers have improved the design of the engine. I had to shift the crankshaft by 1 cm relative to the longitudinal section of the BC. Under the repair dimensions, it will not be possible to squander the BC, this is due to the fact that the block was developed as a one-time product. The novelty is also distinguished by the use of a timing chain. Otherwise, a lot was taken from the previous engine model. Other modifications include:
- The design of the collector and additional dampers has been simplified. Enlarged channels for better passage and minimization of soot.
- Sensors are hidden inside, do not require adjustment. The electronic throttle has also undergone modifications, becoming much smaller in size.
- A simpler device is now at the fuel rail.
- The high pressure fuel pump (TNVD) has also been updated and improved in many respects. The pressure is regulated by one non-separable valve, the stuffing box is equipped with a spring. Pump leakage has been minimized, while ensuring a longer product life.
Main FSE malfunctions
Despite all the development and improvement of the FSE model, the 1AZ engine could not be mass produced. This variant was replaced by a new version 2AZ. Every owner will face such D-4 problems sooner or later.
- low fuel injection pump resource. The device showed itself well when interacting with a diesel internal combustion engine, but gasoline negatively affects its components. Diesel fuel has lubricating resources, which cannot be said about gasoline. In addition, according to the existing Euro-4 standards, additives are added to it that are absent in diesel. Accordingly, the wear of the part accelerates and depends on external factors. In this case, the oil in the crankcase increases several times. Such large volumes lead to failure of the cams, bushings and other components;
- the exhaust gas recycling system is another weak element of the presented unit. Despite the improvement of the element over time, the intake manifold, dampers and EGR throttle are covered with soot. As a result, every owner of a car with FSE is faced with unstable idle, dips, twitches;
- it is possible to adjust the timing valves, but for this it is necessary to choose the appropriate machine, which is expensive and almost impossible, because it is rarely carried out;
- such an insignificant element as the fixing screws of the cylinder head also have their drawbacks. Their length is too short, so often the owners are faced with constant scrolling and thread breaks. As a result, you can not do without coolant leakage, loss of compression. Only in 2007, the developers eliminated this malfunction. The model of the FE power unit of the 1AZ family is more successful, because it does not have a high-pressure fuel pump.
To extend the service life of the mechanisms, it is necessary to take care of the favorable operating conditions of the unit.
- Avoid the use of low-quality fuel or oil, which is so necessary for the full functioning of any motor. Even a small amount of sulfur, which can be found in gasoline, can cause precision mates to wear, as if from abrasive powder.
- In order not to encounter the problem of gasoline leakage from the high-pressure fuel pump into the oil sump, it is recommended to constantly monitor the oil level indicator. For this, it is not necessary to have devices, everything is done by touch. If the level rises, then it is worth diagnosing the condition of the pump.
- The intake system must be under control. Therefore, it is necessary to ensure its full cleaning. To do this, it is necessary to drive the power unit at high speeds, which will allow you to get rid of possible carbon deposits on the parts of the ShPG.
- When replacing the timing belt, it is important to ensure that the sprocket marks on the gear covers and on the chain itself match. All consumables for installation must be of high quality.
Opinion of 1AZ owners
I have been operating 1AZ for a year now. I leave my car outside even when it's cold. Initially, the speed was floating, it was necessary to clean the nozzles, and the issue was resolved. So far they have not been bothered by this problem. During the year there were no significant malfunctions, so I can say with confidence, enjoy the dynamics.
a friend has an Avensis car on which this unit is installed. For so many years, no complaints. With a run of 70,000 thousand, not a single flaw was found. However, if you do not start the engine during a frosty night, it will be difficult to start the engine in the morning. start up. The starter turns but does not start.
The engine showed its best side, but it is necessary to select high-quality fuel. Because of this, problems arise at 40 thousand km, the need to replace the high-pressure fuel pump emerges. If the fuel is of high quality, then there will be no complaints about its work. But sometimes there are enough problems without it. The OPU did not dare to buy not because of the motor, but because of the external qualities and the term of 6 years, since then it has not been produced, because there is no demand.
We bring to your attention the price list for a contract engine (without mileage in the Russian Federation) 1AZ-FSE
Engine Toyota 1AZ-FE/FSE 2.0 l.
Toyota 1AZ engine specifications
| Production | Kamigo Plant Shimoyama Plant |
| Engine brand | 1AZ |
| Release years | 2000-present days |
| Block material | aluminum |
| Supply system | injector |
| Type | in-line |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 86 |
| Cylinder diameter, mm | 86 |
| Compression ratio | 9.6 9.8 10.5 11 |
| Engine volume, cc | 1998 |
| Engine power, hp / rpm | 145/6000
150/5700 150/6000 152/6000 |
| Torque, Nm/rpm | 190/4000
193/4000 193/4000 200/4000 |
| Fuel | 95 |
| Environmental regulations | Euro 5 |
| Engine weight, kg | 131 |
| Fuel consumption, l/100 km (for RAV4 XA20) - city - track - mixed. |
11.4 7.3 9.8 |
| Oil consumption, g/1000 km | up to 1000 |
| Engine oil | 0W-20 5W-20 |
| How much oil is in the engine | 4.2 |
| Oil change is carried out, km | 10000
(preferably 5000) |
| Operating temperature of the engine, hail. | - |
| Engine resource, thousand km - according to the plant - on practice |
n.a. 300+ |
| tuning - potential - no loss of resource |
200+ n.a. |
| The engine was installed | Toyota Avensis Verso Toyota Noah/Voxy Toyota Gaia Toyota Isis Toyota Wish Toyota Allion Toyota Opa |
Malfunctions and repair of the 1AZ-FE / FSE engine
The AZ series of Toyota engines, which appeared in 2000, replaced the popular and well-established S family of engines. In the new engines, the cylinder block has become lightweight aluminum, the VVTi variable valve timing system on the intake shaft is used, direct fuel injection (FSE modification) is used to reduce the load on the liners, the cylinder axis is shifted relative to the crankshaft axis, electronic throttle is used and so on. The 1AZ-FE / FSE engine itself is a replacement for the well-known, but unlike its predecessor, the release of modifications on the new engine has not reached such a scale ...
Toyota 1AZ engine modifications
1. 1AZ-FE - the base engine of the series, compression ratio 9.6 and 9.8. Power 145 and 150 hp The engine has been produced from 2000 to the present.
2. 1AZ-FSE (D4) - similar to 1AZ-FE, but with direct fuel injection. The compression ratio, depending on the modification, is 9.8, 10.5 and 11. Engine power, respectively, from 150 to 155 hp.
Malfunctions, 1AZ problems and their causes
1. Thread breakage in the cylinder head mounting block. The main problem of all AZ engines, symptoms: antifreeze on the rear wall of the cylinder block, overheating, loss of geometry, block in the trash ... It is solved by restoring the thread, or replacing the cylinder block with an updated one of 2007 and younger, it was then that the problem was eliminated.
2. Engine vibration at idle. It manifests itself, as a rule, when the speed drops to 500-600 rpm and does not give a quiet life to the owners. This is a feature of the engine with which it is useless to fight, you can clean the idle valve, throttle, injectors, EGR system (if any), DMRV, check the pillows, in the end, this will partially help.
3
. Twitching 1AZ engine.Clean the throttle body and carbon deposits in the intake manifold with its flaps, the motor is prone to carbon formation, this will help. If the problem persists, see VVTi and lambda probe.
In addition, on models for the Japanese market equipped with an EGR system, there is a traditional problem with the formation of soot and the subsequent floating of revolutions, loss of power and general stupidity of the car. The problem is solved by cleaning or plugging the miracle valve. Overheating of the 1AZ engine is fraught with loss of geometry and replacement of the motor with a contract one. The FSE (D4) versions are very sensitive to fuel, filling the engine with slag, there is a chance to get to replace the injection pump and injectors, their cost is quite high. The timing chain is normal, on average it runs more than 200 thousand km, does not stretch and does not ask for a replacement. Despite the disposability of the block, the engine resource is high, mileage over 300 thousand km is not at all uncommon. In general, the motor is good, if you monitor the condition and pour good oil, then 1AZ will not let you down.
On the basis of this engine, a large-volume counterpart, a 2.4 liter 2AZ, was also produced, a separate one about it. In 2007, the new ZR series of Toyota engines was introduced and the model began to gradually replace the 1AZ.
Tuning engine Toyota 1AZ-FE/FSE
Chip tuning. Atmo
There are options for converting the engine into a 2.4 liter 2AZ, but the cost of such things is far beyond reasonable. Therefore, consider the most relevant option for increasing power - supercharging.
Compressor on 1AZ-FE/FSE
For AZ engines, Blitz and TRD companies produced ready-made compressor kits, you only need to buy, install, supplement it with an intercooler, blowoff, thick cylinder head gasket, 440cc injectors, a Walbro 255 lph pump, remove the catalyst, or replace the exhaust with a direct-flow diameter 63mm, tune in to Greddy E-manage Ultimate and get your 200hp. on a standard piston. You can leave the brains of the standard, but it will definitely go worse.
In the early 2000s, Toyota introduced a new line of AZ engines, which became an adequate replacement for one of the most massive series of S series engines. In particular, 1AZ-FE became a replacement for one of the most popular engines for middle class cars -. However, Toyota did not achieve such a range of configurations and modifications on the new unit as its predecessor.
Like many lines of conventional gasoline engines, this series received a modification 1AZ-FSE - a model with direct fuel injection. This internal combustion engine is less common in Russia, but also worthy of the attention of buyers. Today, such motors continue to be installed on a number of classic models, but more modern units are already being sold in Russia.
Main technical characteristics of the engine
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The power units of the series are universal, so their characteristics do not differ in excessive power injection or amazing torque. The Japanese tried to make a unit that endures high mileage without repair, has practical timing chains, and also has a minimum number of serious problems.
Here are the main characteristics of the 1AZ-FE engine:
| Production | Japan (Kamigo, Shimoyama) |
| Series | 1AZ |
| Start of production | 2000 |
| Unit volume | 1998 cc cm. |
| Rated power | 145-150 hp |
| Peak power, rpm | 5700-6000 rpm |
| Torque | 190-200 N*m at 4000 rpm |
| Cylinder block | aluminum |
| Motor weight | 131 kg |
| Fuel supply | injector (for modification FE) |
| Cylinder arrangement | row |
| cylinders | 4 |
| valve | 16 |
| piston stroke | 86 mm |
| Cylinder diameter | 86 mm |
| Compression ratio | 9.6 – 9.8 |
| Fuel | gasoline, not lower than 95 |
| Ecological approval | Euro 5 |
| Fuel consumption per 100 km: | |
| - city | 11.4 l |
| - mixed | 9.8 l |
| - track | 7.3 l |
| Oil consumption per 1000 km | no more than 1000 gr |
| Oil type | 0W-20, 5W20 |
| Oil volume in crankcase | 4.2 l |
Toyota powertrain design
A lightweight aluminum cylinder block and an excellent VVT-i valve timing system were important achievements of the unit. The electronic throttle made the motor easier to operate, more stable and removed a number of potential breakdowns. The axis of the cylinders has a design feature - an offset relative to the axis of the crankshaft. This was done to increase the life of the sleeves.
The plant did not determine the engine resource, but the reviews allow you to form an opinion about the service life of the unit. A mileage of 300,000 km is considered normal. With a higher mileage, malfunctions occur that indicate serious wear of the main mechanisms and parts.
Attached equipment runs for a long time, does not cause problems. The generator on some cars requires replacement after 200,000 km. In the cooling system, problems can only be caused by a thermostat that does not like the Russian winter. The valve mechanism itself, as well as the entire cylinder head system, do not cause problems. It is important to monitor operating conditions and provide good service.
Gearboxes for 1AZ engine
Boxes were installed traditional mechanical and automatic. The 6-speed mechanics serves quite well, does not cause any problems. Automata are characterized by unconventional behavior in D4 modes and some variants of forced gear engagement. But this is not a question for the motor, but for the automatic transmission itself. The device of the box is quite complicated, and one of the big problems for the owners of such cars with a gun will be the high cost of repairs.
On which cars the 1AZ-FE engine was installed
The list of models for this unit is small. The modified one was installed on a wider range of models. The unit described today serves under the hood of such cars:
- (in some Aurion countries) 2006-2009;
- (also bet on RAV4 Euro) from 2001 to 2006;
- Toyota Avensis Verso (Picnic in some countries) from 2001 to 2009.
Despite the fact that the units are no longer put on new cars of the concern for the Russian Federation, they are still produced and sold as spare parts for car repairs. The bulk of the Russian market is represented in Camry and RAV4, but the Avensis Verso was practically not sold with us, there are only used cars brought from Japan.
The main problems in the engines of the 1AZ series
Despite the rather high reliability of these units, they also had childhood illnesses. It is important to note that even the new engines did not get rid of most of the problems. Many unpleasant little things, such as breakage and the need to replace pushers, often lead to large-scale work - sleeve, replacement of standard parts with oversized pistons, for example. But these are isolated problems. It is worth remembering about more massive troubles:
- Disruption of the threads of the cylinder head fastening. The gasket does not help, antifreeze accumulates on the back wall of the block. The geometry of the structure is knocked down, the block is sent to the trash, expensive repairs are needed.
- Vibration at idle. This also translates into an idle problem. Usually cleaning the fuel supply system, EGR, idle valve helps. The replacement of the unit installation cushions also partially removes vibration.
- The motor is twitching. 1AZ-FE is prone to carbon deposits, it is necessary to clean the intake manifold. If this does not work, you will have to look at the VVT-i valve or even change the lambda probe.
- Floating turnovers. Also, often with this symptom, the engine is dull, fuel consumption begins. The culprit is the EGR system, which was not installed for the European market, only in Japanese versions. It is recommended to disable it on a good service.
- Consumption increase after 200,000 km. Most likely, you will have to change the nozzles, as well as look at the injection pump system. It is quite possible that a serious engine capital with good investments will be required.
Does the valve bend in the engine with problems with the timing?
This model of the unit is equipped with a chain, and many motorists consider this system to be indestructible. But the problem is that jumping the chain will become a serious nuisance. When removing a valve cover after such a problem, you will be surprised how destroyed the cylinder head system is. At high speeds, it does not just bend the valves, but destroys the entire head without a chance of recovery.
Another problem is that such motors do not go too long after repair. The restoration itself is not easy, as specific turnkey dimensions and unusual factory clamping requirements create problems. What is only the tightening torque of the connecting rods, which must exactly match the factory manual. It is also not easy to select pistons, especially if repair dimensions are needed. When it comes to capital, it is often easier to find a contract motor.
Operational features of the 1AZ-FE motor
Many confuse this series with motors. Engines with the ZZ designation are smaller displacement, built specifically for the US market, and have far fewer childhood illnesses. Looking at the pros and cons of buying a new AZ powertrain, you'll find more benefits. But when choosing a car with good mileage, such a motor can bring a lot of trouble. Among the operational features, it is worth noting the following features:
- sellers often repair cars of poor quality before selling, mask cracks in the crankcase and other problems;
- among the minuses, it is worth noting a small resource, as for Toyota power plants, this is also a big nuisance;
- expensive components - another drawback, when servicing, even the original alternator belt will not be easy to buy;
- high service requirements - the oil filter, oils, antifreeze and other consumables must be of very high quality.
1az-fe under the hood of rav4
But there are also significant advantages of the unit. Among the advantages are good service of the fuel system, reliability of the timing system at low mileage. Many car owners in Eastern Europe install HBO, and the engine does not lose its resource. It is enough to change the candles and check the oil level. You do not have to conduct more thorough and expensive diagnostics to maintain the performance of the power plant. Even with poor fuel, there are usually no serious problems.
Tuning and refinement of the 1AZ-FE engine
The issue of refinement and increase in power practically does not arise up to 150 thousand kilometers. But after this milestone, the engine loses some power. Given the robust design, the power unit can be easily improved using both software methods and hardware tuning.
The main possibilities for increasing power are as follows:
- Chip tuning using software methods (Stage 1). It is possible to increase the power of the installation to 165-170 hp without harm to the motor.
- Boring. You can bore the cylinder block, the output will be a 2AZ engine with a 2.4-liter volume and significantly increased traction. But the cost is unrealistically high.
- Supercharging Turbocharging kit from TRD, for example, is suitable for this engine. Of course, you will need an intercooler, new nozzles, a thicker cylinder head gasket and other minor improvements. Engine potential - 200 hp without changing the piston group.
Also, during tuning, the catalyst is removed, a direct-flow exhaust system is installed, EGR is removed, factory restrictions and software blocks are removed (Stage 2 tuning). All this will help to achieve freer breathing of the motor, which will give more freedom in movement. But with incorrect tuning, engine wear will be excessively high.
Conclusions - reliability and practicality of the 1AZ unit
This motor is not the most reliable of the Toyota line. But the motor without problems can reach up to 300,000 km without significant changes in power and basic characteristics. It is worth remembering that Toyota needs good oil, optimal consumables. If the operation does not meet factory specifications, the fuel system and the head of the block will begin to create problems already in the second hundred thousand mileage.
The masters at the service claim that the 1AZ-FE is quite maintainable, but its restoration is quite expensive. Therefore, in case of serious breakdowns, it is often more profitable to find a good contract motor from Japan. Before installing such engines, it is better to disable and remove the EGR unit.
