Checking and setting valve timing according to Niva Chevrolet marks. Setting the valve timing by marks Niva Chevrolet Installing the ignition of a VAZ 2123 injector by marks

Every part on a car wears out over time. This also applies to the timing chain. Of course, the chain will last a little longer than the belt, but still, it will fail at some point. A worn belt can break, but with a chain the situation is somewhat different; it stretches. At first, its stretching will not be very noticeable, but over time it will be seriously felt. And then it will have to be replaced with a new one. Here we will talk about replacing the timing chain on a Chevrolet Niva yourself.

Terms for maintenance and replacement

It is quite possible to carry out this procedure yourself. Of course, you will have to try to do this, but it is worth it, because replacing the chain drive yourself is not only saving money, it is also an experience gained. There are no specific recommendations regarding the timing of replacing a chain on a Chevrolet Niva. Simply, after 100,000 km, it is necessary to carry out diagnostic procedures in relation to this unit, during which the degree of wear of the consumables will be revealed. The characteristic grinding sound of the motor will indicate chain wear. Problems with chain stretching are indicated when it can no longer be tensioned in the usual way and when it is pulled back by half a tooth. If this happens to your car’s chain, it’s time to replace it with a new one. The chain will have to be changed even if chips and cracks are found on it, if the marks on the crankshaft pulley and the timing cover do not match.

When the chain stretches, the pitch between its links increases and the engine will no longer run smoothly, even when the compression is normal. Low tension will be indicated by the chain falling between the teeth. A loose drive will oscillate, and this will certainly lead to damage to the dampers. The chain will simply break them. But the worst thing will happen when the chain falls off the teeth. This incident can only be compared to a broken belt; the consequences will be exactly the same: the valves will hit the pistons and their deformation will occur. The cylinders will also suffer from this. Therefore, as soon as it becomes clear that the chain can no longer be tensioned, it must be changed. This article is for those who want to do it themselves.

What will it take?

It must be said right away that along with the chain, the gears will also have to be replaced. The timing mechanism wears out more if it uses a chain as a drive. If in the case of a belt drive the rollers do not always have to be replaced, then the sprockets wear out very much from the chain. Of course, before changing them, you need to visually assess their condition. It is quite possible that they will still be able to serve. But if the sprockets wear out, they will also wear out the new chain drive. Along with the sprockets, the oil seals and other consumables that need it also need to be replaced. Don't skimp, buy everything you need so you don't have to disassemble the mechanism again.

First of all, we buy a chain. It's better to do this in stores. And when buying on the market, you need to know how to check the consumables. You can check it this way: lay the chain flat and hold it suspended. A sagging of more than 1 cm will indicate that they are trying to slip you a used consumable.

Here's what else you'll have to buy along with the chain:

• gears, if they are worn out;
• tensioner;
• sedatives;
• oil seals;
• gaskets

Dismantling

1. First, the air filter is dismantled and a plug is placed on the carburetor neck.
2. Disconnect all the hoses and the choke cable and move them to the side.
3. Now it’s the turn of the generator belt and pump pulley. Let's take them off.
4. Remove the engine boot and clean the engine cover.
5. We put the car on the brakes and put chocks under the wheels. We proceed to further disassembly by putting the car in 4th gear.
6. To loosen the ratchet nut, you need to put a wrench on it and hit it with a hammer. It’s stuck, and you can’t just turn it away.
7. Remove the valve cover.
8. Now the crankshaft pulley needs to be turned. This is done so that the marks on it align with the marks located on the motor casing. The mark on the bearing housing must be aligned with the mark on the camshaft sprocket.
9. Remove the crankshaft pulley.
10. We remove the casing from the engine, unscrew and dismantle the dampers.
11. We remove the hydraulic chain tensioner by unscrewing all the necessary nuts.
12. We remove the camshaft sprocket and limiter. After loosening the chain, remove the small star.
13. Remove the chain along with the oil pump gear.

Installation

Be sure to replace the crankshaft front seal. Before installing it, you should clean the seat. The new oil seal is lubricated and installed using a mandrel. Use a hammer to hammer the fastening bolt located on the shoe. The bolt is tightened until it stops, and no backlash is allowed. All new gears should be installed so that all marks coincide.

Let's start putting on the chain. First, it should be lubricated and then put on the crankshaft sprocket. Then come the camshaft and oil pump gears. When tensioning the chain, you need to make sure that the shafts are located according to the marks. We install the tensioner and rotate the crankshaft, checking the alignment of the marks.

We install the timing case in its place. We clean the seat and apply sealant. Install the pulley and tighten the cover fastening until it stops. In 4th gear, tighten the pump pulley nut. We install all the other parts in place and check the operation of the motor.

Video instruction

This item

There are no specific timing for replacing the timing chain on a Chevrolet Niva. The stretching of the part is indicated by the characteristic noise of the engine after the car has traveled 100 thousand km or more. If the chain cannot be tensioned in the usual way or it easily pulls away from the sprocket by about half the height of the tooth, this also indicates a problem.

A phase check can also serve as a criterion for replacement. If the mark on the camshaft sprocket coincides with the mark on the bearing housing PB, and the mark on the crankshaft pulley at this moment is 1 cm below the mark on the front engine cover, the chain will have to be changed. The same should be done if the bushings are chipped or if cracks are detected in the cheeks of the Niva chain.

Due to the increase in the pitch between the chain links, the engine will idle unevenly even with proper ignition and normal compression.

That is why the part needs to be replaced. Weak tension allows it to “fall” between the teeth of the sprockets, creating that very characteristic engine noise. When the chain oscillates, it can break the damper, the corner of the shoe, or the stop pin.

If a loose timing chain jumps a couple of teeth, the best news that day will be a stalled Niva Chevrolet engine. Or the meeting of the valves with the pistons will lead to serious engine damage. It is because of this that it is recommended to adjust the chain tension on the Chevrolet Niva more often and replace it as soon as normal tension becomes impossible.

What is needed for the work?

Internal structure of the tensioner

The chain on a Chevrolet Niva wears out the timing mechanism more than the belt, so the sprockets will also have to be replaced. Old gears will wear the new chain unevenly, causing slippage and breakage. Of course, this is hard mechanical work. But replacing a chain is done quite rarely, so you can at the same time change the seals and gaskets, as well as all related worn parts.

First of all, you need to purchase a new timing chain (timing chain) for the Niva Chevrolet. To ensure its quality, lay the part flat and hold it suspended. If the ends sag by more than 1 cm or the sagging is uneven, it is better to refuse the purchase - most likely, the chain has already worked.

The gas distribution mechanism in a Niva Chevrolet car and the placement of marks on this car directly affects the performance of the car. To correctly set the Niva Chevrolet timing marks, you can read this article, it will help you in this matter.

As you know, the timing chain is a more reliable element of the gas distribution mechanism than the belt. Unlike a belt, it does not wear out so quickly and the likelihood of it breaking is quite low. However, sooner or later, every owner of a Niva Chevrolet faces the question of the need to replace the chain and set the marks according to the standard.

Niva Chevrolet car

As for the timing, the manufacturer does not regulate the frequency of replacing the mechanism chain on a given car model. As a rule, this happens no earlier than after 100 thousand km. But if, during operation of the internal combustion engine, a sound appears that was not there before, this may cause the chain to stretch. If the chain cannot be tensioned using the usual method, this may indicate the need to replace it.

Phase diagnostics may also indicate the need to change the chain. If the mark on the camshaft sprocket does not match the one on the bearing housing, the element should be replaced. Likewise, if chips have formed on the bushings.

In addition, if you find cracks directly on the chain itself, then this, of course, also indicates the need to replace the component.

Stages of work

In principle, anyone can handle replacing the timing chain and installing tags. It is enough just to be attentive and careful. Below are instructions for replacing the chain and marking the mechanism.

What do you need to prepare?

First, you should buy a chain for the Chevrolet Niva device. To avoid purchasing a fake, there is a sure way to check the quality of the item. Take the chain flat in your hands and place your hands in front of you. If you see that its ends have begun to sag, and the sagging rate exceeds 1 cm, then it is better not to purchase the element. The same applies if the sagging of the part is uneven. In addition, buy:

• oil seal (frontal);
• new cylinder head gasket;
• pump gasket.

Frontal oil seal at the installation site Cylinder head gasket Niva Chevrolet Pump gasket

Step by step instructions

1. First you need to install the Chevrolet Niva on the handbrake and remove the air filter.
2. Disconnect and move to the side the choke cable, as well as the pipes and the electric drive.
3. Dismantle the fan, pump shaft, and generator belt. Inspect the belt. If damage is visible, the belt should be replaced. Remove the pan protection and clean the front cover.
4. Using a wrench, start unscrewing the ratchet nut.
5. Remove the valve plug, and then unscrew the washer of the camshaft pulley gear screw.
6. Then start turning the crank pulley so that the marks on it, as well as on the front cover of the internal combustion engine, match. Also ensure that the marks on the bearing housing and on the gears of the camshaft pulley match.
7. Next, you need to dismantle the front cover of the engine and pull out the chain guide, and also unscrew the oil pump screw. But you don’t need to pull it out, just loosen it.
8. Then you should remove the element tension mechanism. To do this, dismantle the MM line, replace the pressure sensor and unscrew the nuts of the device. After this, the tensioner can be removed.
9. Remove the screw on the timing pulley gear. The gear can be removed. This completes the analysis of the device. Proceed with the installation of new parts.
10. First of all, you should change the crank pulley oil seal. The used component must be removed, and the installation site must be cleaned of remnants of the old part. Take a new oil seal and lubricate it, motor fluid is suitable for this. Install it in place of the old one.
11. Now take the timing chain and lubricate it as well. First install it on the crank pulley gears, then on the oil pump and on the camshaft. The chain should be tensioned from sprocket to sprocket, while observing the position of the pulleys according to the marks.
12. Install the timing belt tensioning component and tighten all nuts with a wrench. Having done this, check again that the marks match. Also tighten the screws on the gears.
13. After this, the crank pulley should be turned several times to check the position of the marks again. Install the alternator belt. If the old one is worn out, install a new belt.
14. Next, you need to install the cylinder head gasket, having previously lubricated it. Install the block head, then tighten all the pins and nuts of the cover. Replace the rollers if necessary. Carry out all subsequent assembly in reverse order.

Dismantled cover Bottom - old chain, top - new Mark on the camshaft pulley - should be opposite the ebb on the bearing housing Mark on the camshaft pulley - should be opposite the ebb on the bearing housing Mark on the master disk - in the middle of the DPKV Close photo of the mark on the master disk - in the middle of the DPKV

Photo gallery

Photo 1. Tensioner kit disassembled Photo 2. Drive cover Photo 3. Bottom - old chain, top - new

Video “Installing a timing chain on a VAZ”

Look at the video to see how the process of installing the chain on VAZ cars occurs; in the case of the Chevrolet Niva, the procedure will be almost the same.

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Timing marks on a Chevrolet Niva car

In a Chevrolet Niva car, the gas distribution mechanism is driven by a chain. This allows you to get better performance when operating the car. In engine models with a timing belt installed, teeth may slip when it is stretched. But, despite the higher technical performance, the chain also has some disadvantages. It is subject to stretching and may burst if the engine is used frequently at high speeds. When replacing the chain, you should pay special attention to the location of the Niva Chevrolet timing marks.

Marks are special notches that can be seen on the pulley of the gas distribution system. These marks must be aligned with those on the chain.

The purpose of the marks in the timing mechanism.

Installing the chain according to the marks is necessary in order to ensure better fixation and operation of the mechanism. Installing a chain without aligning with the marks can lead to desynchronization of the gas distribution system and increased wear. Changes in performance can also be caused by chain stretching.

Adjusting the chain according to the marks.

When replacing a chain, installing a new one should be done in several stages:

• collecting the necessary tools: screwdriver, set of keys for 8, 10 and 13. Wrench for rotating the crankshaft
• The car is placed on a viewing hole or raised using a jack. The wheels are fixed with shoes or a stop.
• Before starting work, you must turn off the fan and unscrew the radiator mounts. All pipes, except the air duct, remain in place; the antifreeze does not drain.
• After this, the valve cover is dismantled. After all the fasteners have been unscrewed, you must carefully remove it, preventing dirt from getting inside.

Labeling.

1. To set the Niva Chevrolet timing belt, you need to rotate the crankshaft until the marks on the camshaft gear and bearing are aligned. When the chain is positioned correctly, the marks on the crankshaft should align with the mark on the chain cover. For greater convenience, the notch has an oblong shape. If the notches do not match, it is necessary to adjust the position of the phases.
2. To do this, you need to loosen the fastening of the lock washer, and then remove the bolt from the camshaft sprocket using a 13mm wrench.
3. After this, the gearbox must be set to speed 1 so that the bolt securing the crankshaft gear does not turn. Then, together with the lock washer, the fastening bolt is unscrewed.
4. It is important to remember that after carrying out these steps, the bolt is not fixed in anything, so it may fall into the engine sump. When carrying out work, it is necessary to use a wrench with a deep head.
5. The next step is to dismantle the tensioner. If there is no need to replace this element, you can remove the chain by squeezing the plunger using a screwdriver.
6. Then you need to slightly pull the chain towards you to remove it from the crankshaft sprocket.
7. To adjust the chain and align it with the marks, it is necessary to move the chain by 1 tooth.
8. To make work easier, it is better to install the sprocket together with the chain. In order for the holes in it and the alignment pin to coincide, you must turn the crankshaft in the desired direction to match the notches.
9. After this, the lock washer is installed. The bolt is inserted into the fastening point, but is not tightened.
10. For the next operation, the key for turning the crankshaft will again be useful. You should use it to make two or three turns to check that the marks match.
11. If all marks match, the installation is considered complete. Otherwise, you must repeat all steps.

In fact, this work is completed in a fairly short time. The main thing to remember is that an exact match of the Niva Chevrolet timing mark guarantees correct and stable operation of the engine. It is also important to remember that when installing the valve cover, it is necessary to replace the gasket with a new one, because when removing the old one, microcracks may appear on the old one, through which oil will leak out.

Checking and setting valve timing according to Niva Chevrolet marks

You will need: a screwdriver, keys “8”, “10”, “13”, a special key for turning the crankshaft.

Setting the piston of the fourth cylinder to the TDC position of the compression stroke

The piston of the 4th cylinder is set to the TDC (top dead center) position of the compression stroke so that when carrying out work related to removing the camshaft drive chain, the valve timing is not disrupted. If the valve timing is incorrect, the engine will not operate normally. Set TDC according to the mark on the camshaft sprocket (when installed according to the marks on the crankshaft pulley and on the front cover of the camshaft drive chain, the piston of either the 1st or 4th cylinder may be in this position). After this, make sure that the marks on the crankshaft pulley and the cover match. If the shaft marks do not coincide, it means that the valve timing is incorrect (the piston of the 4th cylinder is not installed at TDC). In this case, it is necessary to remove the camshaft drive chain from the camshaft sprocket and rotate the crankshaft until the marks align.

You can rotate the crankshaft in the following ways.

1. Purchase a special wrench for turning the crankshaft by the pulley nut. This wrench can also turn the crankshaft from above the engine compartment.

2. Engage 4th gear and slowly roll the car in the desired direction until the mark on the camshaft sprocket matches the mark on the camshaft bearing housing.

3. Engage 4th gear and lift one of the rear wheels. Then turn the hanging wheel in the desired direction until the mark on the camshaft sprocket matches the mark on the camshaft bearing housing.

Location of TDC marks

1. Remove the cylinder head cover (see “Replacing the cylinder head cover gasket”).

2. Rotating the crankshaft, align the marks on the camshaft sprocket and its bearing housing. If the chain is installed correctly, the mark on the crankshaft pulley should align with the long mark on the camshaft chain cover.

3. If the marks do not match, straighten the tabs of the lock washer of the camshaft sprocket bolt.	4. Engage first gear to prevent the crankshaft from turning, unscrew the bolt and...
5. ...remove it together with the lock and thrust washers. The lock and thrust washers are not fixed to the bolt in any way and can be easily removed from it. Be careful not to drop them into the engine pan.	6. Remove the chain tensioner (see “Replacing the camshaft drive chain tensioner”). If you have the necessary skills, the hydraulic tensioner does not need to be removed. It is enough to press out the hydraulic tensioner plunger with a large screwdriver or mounting spatula.

7. Remove the sprocket along with the chain, remove the chain from the sprocket and then reinstall it on the sprocket, changing the position of the chain on the sprocket teeth in the desired direction. It is recommended to move the chain one tooth at a time.

8. Place the sprocket and chain on the camshaft flange, tensioning the drive chain. Since when the position of the chain on the sprocket changes, the hole in the sprocket no longer coincides with the alignment pin in the flange, turn the crankshaft slightly in the desired direction until the hole and pin coincide. 9. Install the sprocket mounting bolt along with the thrust and lock washers and tighten it until it stops, without completely tightening it.

10. After turning the crankshaft two turns, repeat checking the position of the marks as you did before.

11. If the marks match, tighten the bolt and bend the tab of the lock washer onto the edge of its head. If the marks do not match, repeat setting the valve timing.

12. Install all previously removed parts in reverse order. To prevent oil leakage, replace the cylinder head cover gasket.

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Installing the piston of the 4th cylinder to the TDC position Niva Chevrolet

Home Niva Chevrolet Engine

The piston of the 4th cylinder is set to the TDC position of the compression stroke so that when carrying out work related to removing the Niva Chevrolet camshaft drive chain, the valve timing is not disturbed. If the valve timing is incorrect, the engine will not operate normally. Set TDC according to the mark on the camshaft sprocket (when installed according to the marks on the crankshaft pulley and on the front cover of the camshaft drive chain, the piston of either the 1st or 4th cylinder may be in this position). After this, make sure that the marks on the crankshaft pulley and the cover match. If the shaft marks do not coincide, it means that the valve timing is incorrect (the piston of the 4th cylinder is not installed at TDC). In this case, it is necessary to remove the camshaft drive chain from the camshaft sprocket and rotate the crankshaft until the marks align.

To install the piston of the fourth cylinder of the Niva Chevrolet to the top dead center position, turn the crankshaft. You can rotate the crankshaft in the following ways. Purchase a special wrench for turning the crankshaft by the pulley nut. With this key you can turn the crankshaft from above the engine compartment (in the photo the radiator is removed for clarity). Engage 4th gear and slowly roll the car in the desired direction until the mark on the camshaft sprocket matches the mark on the camshaft bearing housing. Engage 4th gear and lift one of the rear wheels. Then turn the hanging wheel in the desired direction until the mark on the camshaft sprocket matches the mark on the camshaft bearing housing.

Location of TDC marks Niva Chevrolet

The TDC marks of the first and fourth cylinders of the Chevy Niva are located on the camshaft sprocket (hole a) and on the camshaft bearing housing (protrusion b)

In addition, the top dead centers of the Chevrolet Niva engine are cast on the camshaft drive chain cover (protrusion a) and on the ring gear of the crankshaft pulley (hole b on the edge of the rim).

New comment

The Chevrolet Niva from the SUV family is equipped with a chain drive in the timing mechanism. The operational properties of a chain are much greater than those of a belt drive. The chain also has better technical characteristics, which affects the transmission torque. If a loose belt causes the pulley teeth to slip, a weakened chain does not allow this to happen. But with the operation of the car, the gas distribution chain also tends to wear out, stretch, burst and become unusable, which requires its replacement. At the stage of replacing the chain, it is important to carry out the installation following the marks. This article will tell you what tags are, their purpose and how to place them on a VAZ-2123.

What are tags and their purpose in the Shnivy mechanism

Marks in the timing system on a Niva Chevrolet car are special types of notches and holes that are located on the gas distributor pulleys. The photo shows pulleys with marks along which the timing chain is aligned.

Marks on the crankshaft pulley

Aligning the chain with marks is done so that it is better fixed and holds the gas distribution mechanism itself. If you install the chain without following the marks, then the operation of the pulleys will be uncoordinated and will subsequently lead to their rapid wear. Therefore, it is important each time when replacing a chain or parts of the gas distribution mechanism, install them in accordance with the marks. The timing system may malfunction if the chain tension is loosened or stretched. In order to correctly set the timing mechanism according to special marks, we will consider the procedure for installing the gas distributor phases on the VAZ-2123.

Setting the timing of the gas distribution mechanism using special marks

So, setting the phases in the timing system according to special marks on a Niva Chevrolet car includes the following sequence of actions:

When assembling, do not forget to replace the gasket on the cover!

The work carried out does not require much time, but is the key to the successful operation of the parts of the gas distribution mechanism of the Niva Chevrolet car. Drawing a conclusion, I would like to note the importance of setting the timing chain according to special marks. If for some reason you forgot to align the pulleys with the marks, then it is better not to start this process and make the adjustment again. This will extend the life of the timing system and all its components.

Sooner or later, the car owner is faced with what is required; replacing the Niva Chevrolet timing chain is no exception. Unlike a belt, which has a shorter service life and breaks when it is completely worn out, a chain has a huge service life, and there comes a time when, unlike a belt, it simply stretches and needs to be replaced.

It is almost impossible to say exactly when replacement is required, and to understand that it has stretched, you can only disassemble the engine, but this is not an easy task. Therefore, you can understand that the chain is stretched by the operation of the engine; during operation, if stretched, a ringing sound will be heard, it may resemble the operation of a diesel unit. As a rule, it needs to be replaced at a mileage of about 100-150 thousand kilometers. In case of wear, not only the chain changes, but also:

• Pad
• Stuffing box
• Gears

And if they are not changed, this can lead to it breaking during movement. Only replacing all elements of the system will guarantee its high-quality and long-term operation, and it is somehow impractical to disassemble the engine floor to replace one part.

Removal

Changing a chain on a Chevrolet Niva is much more difficult than replacing a belt. To do this, you should do the following:

Installation

After removing all elements of the system, you need to carry out proper installation and configuration, for this you need to do the following:

Before installing the chain, take engine oil and lubricate it, then put it on the new elements as follows:

1. We put it on the crankshaft gear
2. Then to the oil pump
3. Then to the camshaft

After replacement, the tensioner is installed in place, the marks of which must coincide with the chain tension; after checking, we tighten all the bolts. Lubricate the gasket with sealant located on the timing cover and install it in place. We install the pulley and two belt rollers in place and tighten the bolts that secure them. Engage 4th gear and tighten the pulley nut. We install all existing pipes, hoses, radiator, fan in their place, and fill with antifreeze. We start the engine for a couple of minutes and check how it works; if everything works properly, we install the protection with the boot in place.