The camshafts of the 16-valve VAZ-2112 let in the working mixture and release the exhaust gases. Unlike an 8-valve engine, where one camshaft serves for intake and exhaust,. This improves not only , but also contributes to less .
Photo of intake and exhaust camshafts
The intake and exhaust camshafts are marked with arrows in the photo. Pictured is the engine with the valve cover removed.
Camshaft difference
The difference between the intake and exhaust camshafts in the presence of a groove for the phase sensor
In fact, there is no difference in the design of the exhaust and intake camshafts. There is only one reason they are not interchangeable. There is a border on the intake camshaft that is designed for.
Some motorists install instead of standard factory camshafts. This is where the significant difference begins.
The intake camshaft has a larger cam size, which in turn opens the valve not by 7.6 mm, but by 13.2. This allows the engine to increase power characteristics. So the outlet itself has slightly different characteristics - the valve opens not by 7.6, but by 10.8 mm, which significantly adds power.
Sports camshaft differences
conclusions
The camshafts of the 16-valve engine on the VAZ-2112 do not differ in design features, in addition, that an additional edge is machined on the intake shaft for the camshaft (phase) sensor. If the inlet and outlet elements are interchanged, this will lead to a disruption in the valve timing, and if the engine runs in this mode for a long time, the owner will inevitably face a major overhaul of the block head, at best.
Each of us is trying in every possible way to improve his car, and there are a great many ways to do this. When it comes to the engine, everyone unanimously talks about increasing its power. Although, if you take the issue more seriously, then first you need to pay attention to its torque.
We know that it is possible to squeeze out the most power at a stable maximum speed, but this engine mode is rarely used. For an ordinary driver, the throttle response of a car is more important, which obediently responds to the gas pedal both in the driving mode from a standstill and during its acceleration. This behavior of the machine is ensured by a large and relatively constant torque at low and medium speeds, which is what VAZ engines “sin” with. At low crankshaft speeds, they do not have sufficient "traction".
VAZ car owners often complain about the jerking of the car at the beginning of the movement, noticeable dips when the gas is pressed sharply, the clutch quickly “flies” for many, and almost everyone notes the inefficiency of the fifth gear. Indeed, at engine speeds less than 3000 rpm. there is a lack of acceptance. The torque curve depends on the timing parameters, the so-called "camshaft phases", as well as the "time-section" of the valve opening, which are set by the profile of the camshaft cams. Depending on its angle of rotation, a different valve opening value is obtained. For better functioning of the car at low speeds, they achieve a quick supply of the required volume of the working mixture to the cylinder, that is, they significantly narrow the opening phase of the intake valve.
Unlike conventional camshafts, sport models use cams with different geometric dimensions. Their taller and wider shape causes the valve to rise higher and stay open longer, ensuring a full mixture is delivered. The cam profile is characterized by smooth shapes, which makes the operation of the gas distribution mechanism more reliable in wide phases.
From the foregoing, it follows that the maximum engine power and its torque can have different values. And if the use of a standard camshaft implies increased torque at medium speeds, then the sporty one provides maximum return at high engine speeds. The sports camshaft for VAZ cars is installed with a split gear (), with the help of which it becomes possible to more precisely adjust and adjust the phases. With its help, the maximum power is adjusted at the required engine speed.
Using tuning camshafts, you can achieve engine operation under load without noticeable interruptions, even when the speed is reduced to the limit level. At the same time, the detonation boundary is pushed back, that is, the “knocking fingers” stop at low and medium crankshaft speeds. A noticeable reduction in fuel consumption and a decrease in exhaust emissions. As a result, the tendency of the engine to detonation decreases, which means that its resource increases.
Camshafts on VAZ engines are quite sensitive to adjusting the gaps, therefore, on tuning camshafts, the cam run-off area on the valve closing side is noticeably increased. This makes it easier to adjust the gaps and reduces their number several times. Let's trace this fact in the following example: after installing a tuning camshaft, valve clearance adjustment is required after 60,000 km of engine run. Using a conventional camshaft would require at least four adjustments. This significantly increases the life of the product and saves money and time required for each valve adjustment. Calculate for yourself: competent adjustment takes at least 3.5 hours and costs about 20 USD.
Camshaft classification
can be divided into two groups: grassroots and horseback. As the name suggests, some increase torque at low engine speeds, while others increase torque at high engine speeds. This is achieved by changing the height of the lift and the special profile of the cams, as well as certain valve opening / closing phases.
downstream camshafts
This type of product has a small lift height in the absence of a valve overlap zone. This mode prevents the mixture at low speeds from being thrown back into the intake. Of course, a low lift height causes a loss of filling at high speeds and this leads to a decrease in the maximum engine power. Therefore, they are mainly used when driving around the city.Do not forget that engine power mainly affects only the maximum speed of your car, which is not a critical indicator. For example, the following figures can be cited: a decrease in the power of the VAZ-2109 engine by 10 hp. will reduce the maximum speed by only 6 km/h.
The advantages of grassroots shafts include an increase in torque on the "bottoms". This is what will allow you to accelerate sharply from a traffic light without shifting into a lower gear. At medium speeds, these camshafts are no better than serial ones, and at high speeds they are even worse.
Riding camshafts
These products, on the contrary, have high lifts, a large valve overlap and wide phases. This mode increases the filling at the "tops", which is due to an increase in the flow area in the valve areas and due to the use of the effect of inertial boost. This leads to an increase in engine power, and the maximum torque is shifted to the high speed zone. Unfortunately, there is a noticeable dip in the "lower end", which is due to the wider phase during which the mixture is pushed back into the intake manifold at low speeds. And the better the characteristics of the riding camshaft, the stronger this effect.
Tuning and sports camshafts
Riding camshafts are further divided into tuning and sports. Their difference is mainly related to the phase characteristic, valve lift and overlap height. The higher the lift, the higher the torque and, as a rule, the power at high speeds.
practically unsuitable for use in urban driving conditions. They have a noticeable dip at low rpm and rather erratic high idle. Their maximum return occurs only in the region of almost limiting engine speeds, which is unacceptable under normal driving conditions.
One of the brightest representatives of the sports class of products can be called
The replacement of camshafts on a 16-valve VAZ-2112 engine occurs when they are worn out and the bearing journals are worn out. Most often this happens when the overhaul of the power unit or cylinder head passes. This is a rather complicated procedure, but it is really possible to do it yourself.
In the video below, the installation of camshafts and split gears on a 16-valve engine of the VAZ family
The video material will tell you how to replace the camshafts on the VAZ-2112 16 valves, give some recommendations and advice.
Camshaft replacement process
Camshafts with gears and fasteners
In order to install camshafts on the VAZ-2112 16 valves, they must first be dismantled. Like any spare part, they are installed in the reverse order from disassembly.
So, consider the step-by-step process of removing and installing.
Dismantling of camshafts
- To begin with, as with any repair operations, it is necessary to dismantle the “minus terminal” from the battery.
- Remove the timing belt cover.
Having unscrewed the fixing bolts, which are indicated in the diagram, remove the timing cover
- Now, it is necessary. Please note that when building .
Unscrew the fastening nuts and remove the valve cover
- Disconnect the wires of the emergency oil pressure sensor, and then unscrew it.
Disconnect the emergency oil pressure sensor
- Using a socket wrench or a head for 8, we unscrew 20 bolts securing the camshaft cover.
The scheme of dismantling and tightening the bolts of the camshaft bearing housing
- Remove the camshaft bearing housing.
- Now, there is free access to two plugs, which are located on the back of the cylinder head. We take them out.
Be careful with the camshaft plugs, if they are not installed correctly, oil will leak out. You won’t notice in time, reduce the engine life or “get stuck for a major overhaul”
Remove the two rear head caps.
- Take out the intake manifold.
- We take out the exhaust camshaft.
We take out the camshafts from the seats
- We press out the seals from the camshafts.
We remove the seals from the camshaft. If it does not come off, carefully cut it or pry it off with a screwdriver.
Installation of camshafts
Now that everything is removed, you can proceed to install new camshafts on the car:
Choice
The camshafts of the cylinder head for the VAZ-2112 are produced only by the manufacturer, so you should not look for analogues.
Original part numbers: intake - 2112-1006015, exhaust - 2112-1006014 . Each camshaft costs an average of about 3,000 rubles.
Nuances
When installing the bearing housing and block head, do not apply sealant that contains silicone. This is due to the fact that the motor heats up, and, accordingly, the sealant, which releases vapors that can enter the cylinders and further through the system. It is worth using a sealant, in which the instructions or on the packaging indicate that it is.
When applying sealant to cavities, do not apply a lot of it, because when the bolts are tightened, it can get inside and this will lead to clogging of the oil channels, and accordingly there will be no lubrication. The lack of lubricating fluid will lead to increased wear of parts that will quickly fail.
conclusions
Replacing and installing camshafts on a 16-valve VAZ-2112 is not entirely easy, but quite realistic. The main thing to ensure the result is caution and following the instructions. It is worth noting separately that the intake and exhaust camshafts are different and not interchangeable. On the inlet there is an additional border under.
The replacement of camshafts on a 16-valve VAZ-2112 engine occurs when they are worn out and the bearing journals are worn out. Most often this happens when the overhaul of the power unit or cylinder head passes. This is a rather complicated procedure, but it is really possible to do it yourself.
In the video below, the installation of camshafts and split gears on a 16-valve engine of the VAZ family
The video material will tell you how to replace the camshafts on the VAZ-2112 16 valves, give some recommendations and advice.
Camshaft replacement process
Camshafts with gears and fasteners
In order to install camshafts on the VAZ-2112 16 valves, they must first be dismantled. Like any spare part, they are installed in the reverse order from disassembly.
So, let's look at the step-by-step process of removing and installing the intake and exhaust camshafts.
Dismantling of camshafts
Installation of camshafts
Now that everything is removed, you can proceed to install new camshafts on the car:
Choice
The camshafts of the cylinder head for the VAZ-2112 are produced only by the manufacturer, so you should not look for analogues.
Original catalog numbers: intake - 2112-1006015, exhaust - 2112-1006014. Each camshaft costs an average of about 3,000 rubles.
Intake camshaft marking Exhaust camshaft marking Nuances
When installing the bearing housing and block head, do not apply sealant that contains silicone. This is due to the fact that the motor heats up, and, accordingly, the sealant, which releases vapors that can enter the cylinders and further through the system. It is worth using a sealant that indicates in the instructions or on the packaging that it is safe for the oxygen sensor.
When applying sealant to cavities, do not apply a lot of it, because when the bolts are tightened, it can get inside and this will lead to clogging of the oil channels, and accordingly there will be no lubrication. The lack of lubricating fluid will lead to increased wear of parts that will quickly fail.
conclusions
Replacing and installing camshafts on a 16-valve VAZ-2112 is not entirely easy, but quite realistic. The main thing to ensure the result is caution and following the instructions. It is worth noting separately that the intake and exhaust camshafts are different and not interchangeable. On the inlet there is an additional border for the phase sensor.
carfrance.ru
Replacing camshafts on a VAZ 2114 with your own hands
Camshafts, like other mechanisms and components of a car, determine the quality of the engine. This material will tell you how to determine the failure of the shafts, how to replace the camshafts on the VAZ 2112 16 valves, and what needs to be prepared for this.
The pulleys of the 16-valve VAZ 2112 must be replaced when they are worn out or they are mechanically damaged. In particular, we are talking about:
- failure or spent service life of the pulley bearing journals;
- mechanical bending of the camshaft;
- spent service life, as well as badass element cams.
Lada 2112 with ICE 16 cells If during engine operation some kind of extraneous knock appears in the valves, then it is usually caused by one of these damages. In the event that you have recorded a reduced pressure of the engine fluid in the system, then this may indicate an increase in the clearances in the bearings.
To do this, in order to eliminate this malfunction, it is necessary to grind and restore the pulley bearing journals. You should also increase the grooves through which the motor fluid enters. This is done so that the lubricating fluid, after the next grinding, lubricates the internal combustion engine elements. As for the necks, after grinding them, they should be polished with GOI green paste.
- new replacement parts (exhaust and intake camshafts);
- socket wrench 8 mm;
- sealant.
Stages of work
In order to properly carry out the process of replacing exhaust elements, we suggest that you use the instructions prepared specifically for our users. Also, this manual is suitable for those who want to replace the exhaust camshaft seals, sensors or plugs.
- Open the hood of your 16 valve VAZ 2112. Remove the protective cover of the timing belt.
- After that, it is necessary to remove the cylinder head cover, as well as the emergency pressure control device (sensor) of the engine fluid. The sensor is removed so that it is not damaged during the work. You can also remove the tip of the sensor wires.
- When the sensor is removed, you need to unscrew all the screws that secure the camshaft bearing housing. This is done with a socket wrench on "8". All bolts should be unscrewed evenly, and not one at a time.
- After that, dismantle the bearing housing for the exhaust camshafts of the 16 valve VAZ 2112. It should be noted that the housing is dismantled with candle wells. They need to be pulled out of the case.
- Now as for the plugs of technological holes. During the camshaft replacement procedure, plugs are often lost from motorists. Plugs are small round pieces.
The plugs must be removed from the installation sites in the cylinder head, there are a total of two plugs, and they are located in the area of \u200b\u200bthe rear ends of the camshafts.
When these elements are dismantled, put them separately. It is better not to lose the plugs.
- After that, you can dismantle the exhaust camshaft. It is advisable to remove the exhaust camshaft first. With the exhaust camshaft removed, proceed to dismantle the intake valve element.
- Now it's up to the seals. We proceed to dismantle the seals, put them aside. By the way, when dismantling the seals, also be careful not to damage them. After removing the seals, inspect the dismantled devices. The seals should not have mechanical damage, wear marks, microcracks, etc.
- If you decide to install sports distribution pulleys on your 16-valve VAZ 2112, then you need to purchase tuned parts in advance. The installation of sports elements is common among Russian motorists. Take your sports camshafts and lubricate their cams, as well as the bearings with engine fluid.
- Please note: the exhaust and intake sports components are not interchangeable, they are labeled. For example, the numbers 1006014 are printed on the exhaust valve components.
- After that, a small layer of sealant must be applied around the perimeter of the cylinder head 16 of the valve VAZ 2112, as well as on the surface of the pulley bearing housing. More precisely, the places of application are marked in the photo. With sealant it is better not to overdo it.
- Once the sealant has been applied, the pulleys can be put back into place.
- Then install the bearing housing on the cylinder head. Tighten all screws evenly until the part body is against the cylinder head. By the way, it is also desirable to tighten the screws in a certain sequence, you can learn more about this in the video and photo.
- Then you should press in the seals, and also mount the plugs in the cylinder head 16 of the valve VAZ 2112. After that, the assembly must be done in the reverse order, do not forget about the sensor.
Video from Artem Ershov "Replacing pulleys on a VAZ 2114"
In this video you can look at the process of replacing pulleys in a 16-valve VAZ car.
AvtoZam.com
How to distinguish the intake camshaft from the exhaust VAZ-2112: photo
The camshafts of the 16-valve VAZ-2112 let in the working mixture and release the exhaust gases. Unlike an 8-valve engine, where one camshaft serves for intake and exhaust, on a 16-valve engine, each phase has its own element. This improves not only the performance of the engine, but also contributes to a lower consumption of the fuel mixture.
Photo of intake and exhaust camshafts
The intake and exhaust camshafts are marked with arrows in the photo. Pictured is the engine with the valve cover removed.
Camshaft difference
The difference between the intake and exhaust camshafts in the presence of a groove for the phase sensor
In fact, there is no difference in the design of the exhaust and intake camshafts. There is only one reason they are not interchangeable. There is a rim on the intake camshaft that is designed for the valve timing sensor.
Some motorists install sports camshafts instead of standard factory camshafts, which increase power. This is where the significant difference begins.
The intake camshaft has a larger cam size, which in turn opens the valve not by 7.6 mm, but by 13.2. This allows the engine to increase power characteristics. So the outlet itself has slightly different characteristics - the valve opens not by 7.6, but by 10.8 mm, which significantly adds power.
Sports camshaft differences
conclusions
The camshafts of the 16-valve engine on the VAZ-2112 do not differ in design features, except that an additional edge is machined on the intake shaft for the camshaft (phase) sensor. If the inlet and outlet elements are interchanged, this will lead to a disruption in the valve timing, and if the engine runs in this mode for a long time, the owner will inevitably face a major overhaul of the block head, at best.
carfrance.ru
Tightening torque of the VAZ-2112 camshaft bed 16 valves: order
Many motorists have heard that it is necessary to properly tighten the threaded connections on the 16-valve VAZ-2112 engine, but they never did it themselves. So, the tightening torque is determined by the manufacturer and is indicated in the repair service manuals.
Video about installing camshafts and split gears on a 16 valve engine
The video will tell you how to properly tighten the threaded connections on the bed of the camshafts
The moment and sequence of tightening the camshaft bed
Camshaft cover tightening sequence
Proper tightening of the camshaft bed, as well as other parts of the cylinder head, determines the normal functioning of all components and assemblies. So, in order to tighten threaded connections, a typical tightening scheme and a torque wrench are used.
Before installing the bolts in place, they must be well washed and lubricated with silicone grease.
In order to properly tighten the bolts, you need to know the sequence. It starts from the middle part and gradually goes directly to the edges. The detailed sequence can be seen in the photo below.
Tightening diagram for each camshaft bed bolt with numbering
As for the tightening force itself, it is 8.0-10.0 Nm. After the bed is installed on the block head, the connection bolts are tightened by hand or without much force using a ratchet with a head.
We tighten all the bolts by hand, but do not tighten
When all the bolts are in place, it is necessary to take a torque wrench and tighten according to the specifications in the order indicated above.
Torque wrench for tightening threaded connections
In what cases it is necessary to tighten the bed of camshafts
Bolts are screwed on. Marked with arrows
Tightening the bed of the camshafts will be needed if it was previously dismantled for restoration and repair work. So, in what cases it is necessary to remove the bed, we will consider in more detail.
Camshafts for VAZ 2112 sport engines
| 2112 - 1006014 / 15 - | M11 | M12 | M13 | |||||||||
| Valve lift, mm | 9,8 | 10,0 | 10,2 | |||||||||
| Valve opening angle, deg. | 296 | 300 | 304 | |||||||||
| Gap, mm | 0,2 | |||||||||||
| 2,7 | 2,9 | 3,1 | ||||||||||
| 2112 - 1006014 / 15 - | M21 | M22 | M23 | |||||||||
| Valve lift, mm | 10,2 | 10,4 | 10,6 | |||||||||
| Valve opening angle, deg. | 312 | 316 | 320 | |||||||||
| Gap, mm | 0,2 | |||||||||||
| Valve lift at TDC, mm | 3,4 | 3,7 | 3,9 | |||||||||
| 2112 - 1006014 / 15 - | M31 | M32 | M33 | |||||||||
| Valve lift, mm | 10,4 | 10,9 | 11,4 | |||||||||
| Valve opening angle, deg. | 300 | 310 | 320 | |||||||||
| Gap, mm | 0,2 | |||||||||||
| Valve lift at TDC, mm | 3,4 | 3,8 | 4,2 | |||||||||
| 2112 - 1006014 / 15 - | M41 | M42 | M43 | |||||||||
| Valve lift, mm | 10,9 | 11,45 | 12,0 | |||||||||
| Valve opening angle, deg. | 300 | 310 | 320 | |||||||||
| Gap, mm | 0,2 | |||||||||||
| Valve lift at TDC, mm | 3,6 | 4,0 | 4,4 | |||||||||
Note:
- The phases are given when the valve overlap point is set to TDC.
- 2112 - 1006014 - exhaust camshaft; 2112 - 1006015 - intake camshaft. Ordering designations e.g. 2112 - 14 - M11 or 2112 - 15 - M13 or for camshaft kit: 2112 - M11 / M13.
- Valve lifts are given taking into account the nominal clearance between the cam and the tappet, i.e. cam lift exceeds valve lift by the amount of clearance.
- Camshafts are completed (exhaust / intake), for example:
M11 / M12, or M12 / M13, or M11 / M13. - The valve lift at TDC is given for setting the valve timing: for the exhaust valve - on the closing side, for the intake valve - on the opening side. It is not recommended to set the overlap point later than TDC.
- Adjustable pulleys are used to set the phases.
The order of integral pushers of various designs is possible.
If you want to prepare a car for sports, then one replacement of the camshafts is not enough, but to a decisive extent, the performance of the engine depends on them. In a 16-valve engine, the possibilities for creativity are even greater. It is possible to install shafts from different series, plus turning each in any direction. Do not forget, if the overlap point is moved too much, there is a chance of bending the valves. Naturally, you need to prepare the whole car: a number of checkpoints, the main pair, wheels, engine. For each type of racing, the car is prepared individually. There is no universally prepared car. It is very important to make the right choice of camshafts. You need to know exactly what kind of car you need.
In the engine, it is advisable to increase the cubic capacity, modify the block head and install the necessary camshafts. The presented line of our sports camshafts from M11 to M43 is arranged in ascending order both in terms of characteristics and cost of improvements. The more invested in refinement, the higher the result. The maximum increase in power is provided by the installation of individual carburetors for each cylinder or 4-throttle injection, as well as a tuned direct-flow exhaust system. The company has developed options for boosting engines 2112 (1.8l): road 190 hp, drag racing 240 hp. In addition, the installation of individual carburetors allows you to achieve idle speeds of 700-900 rpm on racing shafts without any shaking.
Sports camshafts are intentionally built with a reduced base diameter to reduce head rework. Since they have a wide phase and high lift, they have a margin for contact loads at the top of the cam, which allows us to reduce the base diameter.
When participating in drag racing competitions, our team encountered traction difficulties. It clacks - it slips, at Pelenga - the pressure plate falls apart, serial 2112 - breaks the extensions on the basket, etc. We developed a basket of our own design based on 2112, increased the stiffness of the pressure spring by 2 times and strengthened the extensions. The clutch has become workable with almost any disc, withstanding torque up to 30 kg / m, even with a blow. True, it is necessary to install only the VAZ original clutch cable, the rest come off. Baskets can be made to order.
