How to tighten the timing belt on a 16 valve VAZ engine

Tensioning the timing belt on a VAZ-2112 16 valves: checking the tension, drawings and video

The VAZ-2112 engine was installed on LADA cars of the “tenth” family: 2110, 2111 and 2112. Two timing shafts in this engine are driven by a belt. When replacing a belt, you need to be able to control the tension, and it seems that special equipment is produced for this. We believe that tensioning the timing belt on a VAZ-2112 can be done using a dynamometer. In this case, the tension force can be set without errors. You just need to make a technological plate used instead of a tension wrench. The drawing will be given below.

The following video shows how exactly the tension is checked, without even using a dynamometer.

Signs of a worn timing belt on a VAZ 2112

On the surface you can observe cracks, chips, scratches more than 1 mm deep, delamination and visibility of the cord;
The ring gear on the inside has the following defects: different heights of the teeth, longitudinal grooves (if any, check the gears for integrity. They may have a slight deviation along the ring, which will be enough to accelerate wear);
Traces of oil. Because of this, slippage will be observed, which will lead to deviations in the valve timing - untimely opening and closing of the channels, which, in turn, will lead to incomplete combustion of the combustible mixture, lack of “purging” of the cylinder (the moment when both the intake and exhaust channels are open) , engine coking.

The process of tensioning the timing belt “from start to finish”

We perform all operations on a cold engine . Let's say the belt is now being replaced and the nut on the roller is not tightened. Then just skip "step 1":

We take a crocodile clip for the battery and fix the belt on the pulley. Then use a 17mm wrench to loosen the nut (see photo).

First step before adjustment

How to set tension

On a VAZ-2112 engine, the timing belt tension depends on the force applied to the adjusting key. The force should be 2.0 N*m. And our distance from the axis to the “ear” is 51 mm (see below). Multiply 0.051 by 39.2266 (4 kgf in Newtons) and you will get what you need.

Plate drawing

The plate shown in the drawing is made from steel 2 mm thick. The pattern must be made based on the characteristics of the bending equipment. When bending, the length decreases, which means that the dimensions of the pattern will be larger than 94x75 mm.

Threads for M4 screws are cut in the standard way. Each screw should protrude 7 mm beyond the plane.

Error warning

If we talk about the VAZ-2112 engine, the timing belt tension can be increased or decreased. In this case, you must adhere to the recommendations:

Let the holes for the pins first be in the lower left quarter;
Taking the tuning key, the tension is increased by rotating the roller counterclockwise.

The result of correct and incorrect settings is shown below.

Left - which is correct

Turning to the right should correspond to a loosening of tension. And the one who did the opposite, then let him take offense at himself: the belt will wear out very quickly!

If all recommendations are followed, the holes cannot be at the top (as in photo 2).

Replacement with a self-tensioning roller (automatic tensioner)

On engines 11194 and 21126, rollers with an “automatic tensioner” are installed. It would seem that the automatic roller is suitable for any VAZ engine. But don't rush.

Two different tension rollers

The roller from the VAZ-2112 engine is equipped with protrusions on the sides. There are no protrusions on part 21126-1006238. This is the problem.

Don’t take unnecessary risks - you only need the original roller 2112-1006120 or its equivalent.

What did we try for?

If the timing belt malfunctions, the VAZ-2112 engine successfully bends its valves, requiring their replacement. Violations include belt breakage, as well as jumping over several teeth. The second malfunction occurs when the tension force is too low, and the first is the result of wear on the belt as a whole. Draw conclusions.

If the plate is not made

Everyone knows that on a VAZ-2112 engine, tensioning and replacing the timing belt is done using a key. Its appearance is shown in the photo.

Tension adjustment key

You can make a slot on the handle, and then, installing a dynamometer, adjust the force as shown above.

If the force is 4 kgf, then the distance from the slot to the midpoint between the pins should be 49.5 mm.

The difference between methods “1” and “2” is very simple: in the second case, the plate (key) is not fixed. This means that the key will have to be held at the same level while tightening the nut. Make a choice.

Regulations and articles

Check the timing belt tension every 15 thousand km - this is the regulation. We will not give the belt part number - we were not talking about replacement. And if you decide to change the tension roller, find part 2112-1006120-XX. Instead of XX there may be numbers from 00 to 10, and all of these are products of domestic factories (00 is VAZ).

Components produced in Russia

All analogues

Let's jump straight to the list:

MASTER SPORT 2112-1006120-AT-PCS-MS
TORQUE KR5048 or 830900AE2
INA 531075010

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CORAM C747
PILENGA PT-P 1545
FINWHALE BT010
ESPRA 2112-1006120/ES0120
GATES T42042A
SCT SR 912
VBF 830900АЕ1
QUARTZ QZ-12-6120 or QZ21126120

The brands GATES and INA are especially popular.

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How to properly tension the timing belt on 8 and 16 valve VAZ cars

Correctly tensioning the timing belt on production vehicles is a simple procedure, but it requires certain special knowledge.

The algorithm of actions may vary slightly depending on the model of the power unit, and not on the make of the car. There are differences in the procedure for replacing and tensioning the belt on 8-valve and 16-valve engines. Read on to find out how to tighten the timing belt on both types of car hearts.

Four-cylinder eight-valve power units are more often found on:

Sixteen-valve engines are mainly used:

On VAZ-2112;
Lada Priora;
Lada Kalina;
Lada Largus;
Lada Granta;
Lada news.

A number of cars of the Samara 2 family were also equipped with 16-valve engines. In addition, such engines were also installed on models 2110-2111.

When to tension the timing belt

The timing belt of the VAZ-2112 and other VAZ models is tensioned in the following cases:

Installing a new belt;
Loose belt;
“Slipping” of the belt with a violation of the timing adjustment;
Replacement of the tension roller and other timing drive mechanisms.

If the cause of the intervention is a broken or “slipping” belt, you must first ensure the integrity of the valves. A broken gas distribution mechanism (drive) leads to engine damage on 16-valve 1.5-liter power units. However, in cases of drive failure at high speeds, valves and CPGs are also destroyed on other engines.

They check the operation of the timing belt on the VAZ-2114 and other models equipped with 8-valve units by turning the camshaft manually. A working mechanism should turn with some effort. A faulty one, as a rule, cannot be affected.

During the procedure, it is necessary to check the compression in each of the cylinders. The easiest way to do this is to tightly cover the spark plug hole with paper. If there is pressure in the cylinder, the plug is knocked out of its seat at a certain stage of camshaft rotation. » alt=»»> A similar check on 16-valve engines is not recommended. The risk of damage to an initially good valve mechanism is too great. There are no grooves in the pistons of one and a half liter engines of this type. Therefore, valves that move down bend when they contact the piston surface.

Belt tension on 8-valve VAZ engines

Before tightening the timing belt on the VAZ, the following preparatory work should be performed:

Hang up and remove the right front wheel;
Unscrew the 3 bolts securing the front timing cover;
Remove the cover;
Use a 17 key to loosen the tension roller.

After this, you should check the drive marks. One of them, located on the crankshaft pulley, must coincide with the installation tab of the rear cover. At the same time, check the mark on the flywheel. It should be flush with the alignment mark on the block boss.

IMPORTANT! In reality, it is not always possible to achieve an exact match of marks. Therefore, the mechanism is adjusted with an error of +/- 1-2 mm. This does not have a noticeable effect on the driving performance of the car.

If the marks match, the question of how to tighten the timing belt can be considered resolved. Without removing the belt, it is necessary to move the weakened tension roller to the right so that the necessary tension occurs. After this, the roller is tightened tightly. To adjust the roller, a special “horned” key is used. If it is not available, you can use two Phillips screwdrivers, which are inserted into special holes on the roller.

If the marks do not match, the timing belt on the VAZ-2109 must be removed from the pulleys. After this, the pulleys themselves are individually set according to the marks. It is better to start reinstalling the belt from the rear branch. After installing it, the roller is tightened.

IMPORTANT! When installing the timing belt on a VAZ-2114 and other front-wheel drive models, the pulleys located according to the marks can shift by 1-2 teeth. If this happens, the marks should be set with an error to the left, which allows you to compensate for the offset. After installing the belt, the pulleys themselves will move into the required position.

It is necessary to finish tensioning and fixing the belt, and then manually turn the engine 2-3 turns by the crankshaft pulley. To do this, it is convenient to use a “19” head with an extension. The gearbox must be in neutral. If after turning the marks have not moved relative to each other, the procedure can be considered completed. Assembly is carried out in reverse order. » alt=»»> The question of how to check the consistency of the tension should be answered. To do this, hold the strap between your thumb and index finger and turn it 90°. The technician must be able to do this, otherwise the belt is considered over-tensioned.

Replacing the belt drive

First, about the tools that we will need when carrying out repair work:

4. The marks on the flywheel crown should also converge. To trace their coincidence, you need to unscrew the plug on the crankcase. The mark is on the flywheel gear. If it matches the mark (cut) located on the crankcase, then everything is fine.

5. Loosen the tension on the belt drive and check the mark located on the crankshaft. We fix the flywheel by installing a screwdriver between the crankcase and the crown. 6. Unscrew the crankshaft pulley. We check the alignment of the marks on the crankshaft gear and the oil pump. 7. Now you can change the belt. To do this, you first need to remove the tension roller. Then the belt is removed. 8. We tighten the new gear. The tension roller rotates clockwise. This is easier to do with a special key, which should be prepared in advance. If there is no key, then you can use pliers for this, the ends of which are curved. The tension needs to be adjusted until it is optimal. 9. Now we collect everything from the opposite. Don't forget to remove the screwdriver from the crankcase.

Belt tension on 16-valve VAZ engines

Tensioning the timing belt on Priora and other cars equipped with 16-valve engines is generally done in the same way.

However, there are slight differences. Thus, the gas distribution mechanism cover of these engines is mounted on 6, and not on 3 bolts, as in the previous case.

In addition, the timing belt on VAZ-2112 power units (16 valves) is tensioned using two rollers. One of them is movable, used for tension. The second one is the support one. » alt=»»> When tensioning the belt of a “Prior” motor or motor 2112, special care must be taken. After putting it on and tightening it, you must definitely try to crank the engine by hand.

If the crankshaft cannot be turned, you should once again check that the marks are installed correctly. On these engines, an error almost always leads to damage to the valves and piston group.

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Replacing the timing belt on LADA cars with a 16-valve engine

Currently, all new Lada Priora are available with 16 valve engines. These power units are also installed on some versions of Lada Granta, Kalina, Vesta or XRAY cars. The gas distribution mechanism (GRM) of these engines is designed for the timely admission of the combustible mixture into the engine cylinders and the release of exhaust gases. It is important to regularly check the condition of the belt and replace it if necessary.

A simple procedure for replacing the timing belt VAZ 2110, (2112) 16 valves

Former flagship of the Russian automobile industry VAZ 2110 with a 1.5 16 valve engine, replacement of the timing belt, rollers and pumps. The recommended replacement interval is from 40 to 60 thousand kilometers. The mileage on this strap is 80 thousand and, as the autopsy showed, if they hadn’t changed it today, then tomorrow it would have been more work for our mechanic. In general, we recommend that all customers check the condition of the belt at least once every 5 thousand kilometers, or once a year. But knowing the quality of our spare parts, more often is better.

Attention! On this engine, when the timing belt drive breaks, almost all the valves bend.

Consequence of exceeding the replacement interval. We look, remember and don’t let it get to that point. A little more and the meeting of the valves with the pistons would have been ensured.

How long does it take to change the timing belt?

According to the Lada Priora maintenance regulations, the condition of the timing belt should be checked after 105 thousand km, and replaced after 200 thousand km. However, sheared teeth or a broken timing belt can cause the valves to stick (valve bending) into the pistons, leading to costly engine repairs. Therefore, we recommend checking the condition of the timing belt more often - every 45 thousand km.
On Lada Granta and Lada Kalina 2 cars, the timing belt is checked every maintenance (every 15,000 km), and replacement is carried out after 75 thousand km. mileage
On Lada Vesta and XRAY, the condition of the timing belt should be checked after 15,000 km, and replaced every 180,000 km.

Why do you need a timing belt?

In all cars, the timing belt acts as a connecting element between the camshaft and the crankshaft. After all, as you know during operation, the crankshaft rotates due to the work of the piston group, and in order for the camshaft to open the valves at the top point, synchronization of their movement is necessary. The timing belt does this job. In other words, in the absence of such a link, the engine simply will not move.

Therefore, it is very important to maintain it in excellent working condition and replace it on time

How to choose a timing belt?

Complete kit from Gates - timing belt and rollers, all that remains is to choose a pump

Which timing belt to choose? Which one has a longer service life? These and many other questions are asked by many VAZ-2112 owners when choosing a new timing belt. Of course, there is a large selection of belts in stores, and the seller will select one for you based on your parameters, focusing only on the manufacturer.

Among Russian manufacturers, VAZ-2112 owners, according to reviews from most forums, have a leading timing belt - BRT Balakovo OJSC. Further, with a large lag, car enthusiasts choose belts from Gates and Bosch. However, the latter is not stable, because its breakdown can occur either at the 5,000th mileage or at the 20th.

In addition, there are enhanced options from the above-mentioned manufacturers.

Removing the timing belt

You will need : a 5-point hexagon, a 17-point, 15-point, 10-point socket and a large flat-head screwdriver.

Procedure:

Remove the upper timing cover by removing 5 screws.
Remove the lower timing cover by unscrewing the 2 screws. Remove the alternator belt.
Camshaft drive diagram.

In order not to disturb the valve timing, it is necessary to set the crankshaft and camshaft to the TDC (top dead center) position of the compression stroke of the 1st cylinder. For this:

Turn the crankshaft clockwise using the generator drive bolt until the marks on the camshaft toothed pulleys align with the marks on the rear timing drive cover.
check that the mark on the flywheel 1 is located opposite the slot 2 of the upper cover of the clutch housing.

We fix the flywheel by inserting a screwdriver between the flywheel teeth through the hole in the clutch housing. Then:

Remove the pulley by unscrewing the bolt.
Remove the support washer.

Release the belt tension by turning the roller bolt.
Remove the belt from the camshaft pulleys, tension and support rollers.

After removing the timing belt, the crankshaft and camshaft cannot be turned. When replacing a timing belt, the tensioner and support rollers of the belt also change.

Lada 2112 (21124) › Logbook › Replacing the timing belt 16 cl. engine

Replacing the timing belt VAZ 2112 1.6 16 cl.

1. Remove the timing belt protection. The timing belt guard is secured with six bolts. Remove the chip from the crankshaft sensor, unscrew one bolt and remove the sensor.

2. One tooth is missing on the pulley, this is not without reason, this allows the crankshaft sensor to determine the top dead center, and also allows you to block the crankshaft in order to unscrew and tighten the pulley mounting bolt.

3. This is done like this: the pulley is aligned with the hole for the crankshaft sensor and through the hole for the sensor, a suitable size tube or other suitable object is inserted, in my case it is a hexagon, the pulley is blocked, and then unscrewed and removed.

4. Loosen the tension roller nut and remove the old timing belt.

5. Install a new belt, the belt can be installed by turning the right camshaft with a wrench, or you can remove the tension roller, whichever is more convenient for you.

6. Tighten the pulley mounting bolt back and align the timing belt drive gear according to the marks. If there are no marks on the oil pump housing, put marks on the flywheel and, using a chisel, make a mark on the oil pump, this will be more convenient.

7. Align the marks of the camshaft pulleys so that the timing belt drive gear does not go astray

8. Using a special wrench, tighten the belt with a tension roller. If there is no key, don’t be upset, you can tighten it with two nails and a screwdriver between them, or you can take a steel fork, remove the two middle teeth completely, and shorten the two outer ones in half and bend them. Be sure to remember to tighten the tension pulley nut. (To tighten the belt, turn the tension roller counterclockwise (about 10–15°); to loosen it, turn it clockwise)

9. Turn the crankshaft two full turns and check the marks; if all three marks match, put the pulley in place, do not forget about the generator belt and crankshaft sensor, then the belt protection and you can start the engine.

Timing belt tension

1. Check the belt tension. A correctly tensioned belt should rotate 90° from finger force (1.5–2 kgf) in the middle between the crankshaft and camshaft pulleys.

2. I take it with two fingers between the camshafts and up and down. 5-6 mm fluctuates back and forth, then I leave it.

3. Adjust the timing belt tension using a special device. The most correct belt tension is 2 kGs. Having achieved this result, fasten the fastening nut.

4. In the "Manual", the manual verification method is described in detail. It involves checking the tension of the toothed belt in the middle part of the branch between the camshaft pulleys. It should be such that under the action of an object 3 mm wide with a force of 10 kg, the belt deflection is 5.4 mm. Deviations in any direction are allowed no more than 0.2 mm. The engine must be at “room” temperature (+15-30°C). An overtightened belt breaks - the strength of the cord threads is limited. And the tighter the belt is, the faster the threads will break. A loose belt will also not last long, because... when entering the pulley, the belt teeth do not fall into the cavities of the pulley teeth - undercutting occurs and the subsequent separation of the teeth from the base.

Installing the timing belt

Before installing the rollers, apply thread sealant to the threaded part. We do not completely tighten the tension roller bolt. Before installing the timing belt, check the alignment of the timing marks. It is convenient to control the position of the crankshaft by aligning mark 1 on the crankshaft toothed pulley with mark 2 (rib) on the oil pump cover.

We put the timing belt on the crankshaft pulley, tensioning both branches of the belt, we put the front branch behind the support roller, and the rear branch, putting it on the coolant pump pulley, behind the tension roller. Then we put the timing belt on the camshaft pulleys.

The process of removing the old belt

To understand how to change the timing belt on a VAZ 2110, you need to study the instructions.

Stages of the soft product replacement process:

The wire leading to ground is disconnected from the battery.
The alternator belt is removed.
The piston of number 1 cylinder rises. The front right wheel must be removed. Setting the VAZ 2110 8 valve timing marks is done by turning the crankshaft in the direction of movement clockwise. The marks of the camshaft gear are aligned with a special antenna located on the rear cover of the timing drive.
The bolt on the generator drive pulley is unscrewed and removed. A prerequisite is to lock the crankshaft. This will require at least two people. One is engaged in keeping the crankshaft from possible rotation. The other one, from the clutch housing, removes the plug and unscrews the bolt securing the pulley, which is removed. Immediately there is a check of the coincidence of the marks on the flywheel and the slot in the crankcase.
To loosen the nut securing the tension roller, take a size 17 wrench. With its help, the roller is slightly rotated in order to reduce the belt tension.
The timing drive is being removed.

How to tension a timing belt

Insert the tips of the locking ring pliers into the grooves of the outer race of the tension roller.
Tension the belt by turning the tension roller counterclockwise.
We combine cutout 1 of the outer race of the roller with the rectangular protrusion 2 of its inner sleeve. Tighten the roller mounting bolt with a wrench.

After installing the generator drive pulley, turn the crankshaft by the pulley mounting bolt two turns clockwise. We check the alignment of the installation marks on the crankshaft and camshaft, as well as the alignment of the cutout with the protrusion on the tension roller.

The process of replacing the timing belt is also shown in the video:

Installing a new timing belt

We check that the marks on the camshafts and crankshaft match. We install a new timing belt. If there are no directional arrows, put it so that the inscription is read from left to right.

The right, or descending, branch of the belt should be tight. You can turn the right camshaft clockwise a few degrees, put on the belt and turn it back. In this way we will stretch the descending branch. The tension roller has two holes for a special key. You can find it in any auto store. The issue price is 60 rubles. To tighten the timing belt, insert a special key and counterclockwise . Since there is a lot of controversy about tensioning the timing belt, let's write it this way: a tensioned belt should not have a sag between the camshafts of more than 5 mm when pressed and 7 mm on the longest branch (specially experimented).

Remember: an overtightened belt reduces the service life of the pump, and an undertightened belt can lead to cylinder head repair. (photo below)

We check all the marks. We turn the crankshaft two turns and check the marks again. If the pistons and valves do not meet and the marks coincide, then accept my congratulations. Then we put everything back in place in the reverse order of removal. Don't forget to tighten the bolts. We tighten the service belt roller with the same wrench as the timing belt tension roller. Fill with antifreeze and start the car. We wish the belt many years of service, but don’t forget to check it periodically; after all, it was made in Russia.

Replacing the timing belt without special tools

The method can be used if there is no need to change the rollers.

Cut off half of the old timing belt with a utility knife.
Remove half of the old timing belt.
We put a new timing belt on the crankshaft pulleys.
We cut the second half of the old timing belt and remove it.
Pull the new timing belt onto the crankshaft pulleys until the end.

Where can I buy?

These and other original parts are presented at low prices in our online store. Link to timing kit 8kl, timing kit 16kl.

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