Instructions for checking and replacing the camshaft of the VAZ 2107

02/28/2022 10,488 VAZ 2106

Author: Ivan Baranov

Replacing the camshaft on a VAZ 2106 may be required for various reasons, but before moving on to this process you need to have an idea of ​​the purpose of this unit. The camshaft is the main timing link and participates in the combustion process of the combustible mixture.

The camshaft is located at the top of the cylinder head. It is connected to a pulley or toothed sprocket of the crankshaft via a belt or chain drive.

VAZ 2106 car near a pond [Hide]

If the camshaft fails

The camshaft on the VAZ 2106 model is rarely dismantled. Typically during repair or disassembly. Sometimes to replace it.

Signs

First, let's talk a little about the signs that indicate that the camshaft is faulty, its journals or beds are worn out. It is difficult to determine whether the shaft or something else is knocking in the VAZ 2106 engine, but it is possible. The knock of the camshaft is dull and clearly audible. As engine speed increases, the knocking becomes more frequent.

Some drivers determine knocking in this unit using a stethoscope or a stick through the valve cover. But often it is difficult for an inexperienced driver to do this. Therefore, the best way to diagnose the camshaft is to remove it, wash it and inspect it.

If the camshaft is faulty, the following symptoms may occur:

• a dull knock, reminiscent of hammer blows;
• it is impossible to adjust the valve clearances; while the crankshaft is turning, the camshaft is constantly in different positions.

This video shows how you can eliminate longitudinal runout of a camshaft.

The most reliable method for diagnosing problems with the VAZ 2106 camshaft is to dismantle it from the car and wash it. You can wash it in gasoline or other cleaning liquid. Next, you need to hold the shaft and hit the bed, when you hear the slightest knock, we determine whether the mechanism is worn out. Be sure to make sure that the shaft does not move in bed, because when it hits the limiter it will make a dull knock.

Removed shaft

The camshaft has a great influence on the pressure in the lubrication system. If the gaps between the bed and the camshaft are large, then the pressure will be low, and as a result, unsatisfactory lubrication of other parts.

Causes

The main malfunctions that result in the need to replace the camshaft are its wear, the appearance of various scuffs and grooves on the bearing journals. Likewise, replacing the camshaft is necessary if it is found to be deformed or cracked. When such malfunctions occur, the power unit loses power and also begins to function intermittently. Problems with the camshaft are identified by a knocking sound in the cylinder head.

The camshaft on the “six” is rarely removed. In addition to the above reasons for replacing and reconfiguring the power unit. After this, you can notice a significant increase in power, like in sports cars.

Camshaft defect

After the PV is removed from the engine, all its components are washed in gasoline to remove contaminants. Troubleshooting involves a visual inspection of the shaft to identify damage: cracks, burrs, cavities. If they are detected, the shaft must be replaced. Otherwise, check the basic parameters characterizing the degree of its wear, for which a micrometer is used.

A micrometer is used to check the size of the necks

Table: main dimensions of the VAZ 2106 camshaft and its beds in the bearing housing

The condition of the RV can be assessed by other parameters, for example, runout, but special tools are required to remove them.

Replacement Guide

The work of removing the crankshaft on a VAZ 2106 is somewhat labor-intensive, but a driver with little experience can do it. We do not need special equipment or special tools to work.

Set of tools

• set of heads;
• ratchet;
• knob;
• extension;
• a set of keys;
• rags.

Wrenches for tightening and loosening bolts

Sequencing

1. To get to the crankshaft, you first need to remove the air filter and housing.
2. Next, disconnect the choke cable.
3. Gas damper drive.
4. Clean and wash the valve covers thoroughly. Usually dust and dirt accumulate on it, otherwise they may get inside the motor.
5. Now you need to unscrew all the nuts and remove the valve cover. Experts recommend replacing the gasket when removing the valve cover. When purchasing, buy a rubber-cork one, as it holds oil much better than rubber.
6. By removing the cover, we gain access to the camshaft; in most cases it is very dirty.
7. Now you need to loosen the camshaft sprocket fasteners. To prevent the motor from turning over, insert a screwdriver between the sprocket and the chain.
8. Important! Be sure to align the mark on the crankshaft and the camshaft sprocket. You must strive to ensure that the mark on the crankshaft pulley is against the long mark, and the mark on the camshaft sprocket is against the protrusion on the camshaft bed.
9. After alignment, we proceed to removing the chain tensioner.
10. Unscrew the nuts with a wrench.
11. Remove the tensioner.
12. We remove the star, which is located on the guide pin.
13. After unscrewing the bolt securing the sprocket, remove the sprocket. A hammer may be needed here.
14. We tie it to a chain.
15. Now you need to unscrew the nuts securing the crankshaft and remove it.
16. By the way, it will be noted that if a stud with a nut is turned out, then it is screwed back in with a special stud turner.
17. Next, we inspect the camshaft and replace it if necessary.
18. The shaft is clamped according to the diagram. The tightening order must be observed. The tightening torque is also important. On a VAZ 2106 car, the tightening torque is 18.3 N/m.
19. When assembling, be sure to check that the marks are aligned correctly. If they are out of order, they need to be set correctly.
20. Finally, adjust the tension of the chain and valves.

Video “Replacing the shaft”

This video shows how to properly remove and install the camshaft, replace rockers, springs and other shaft components on a VAZ 2106 car. And also at what torque the tightening occurs.

In the VAZ 2106 car engine, the camshaft plays a key role, which drives the valves. Thanks to it, timely intake of the air-fuel mixture into the combustion chambers and release of gases from them occurs, and according to the operating cycle. The shaft is located in the upper part of the engine, under the cylinder head cover (cylinder head). There is a sprocket on the camshaft with which it is connected to the crankshaft. One revolution of the crankshaft corresponds to two revolutions of the camshaft.

The main malfunctions of the camshaft are risks and scratches on the journals, deflection relative to the axis of rotation, increased wear, and multiple scuffs. If the camshaft journals are worn excessively, the oil pressure in the system decreases. But this option is also possible if the seats for the camshaft bearings are destroyed. And if you can install new journals for a small amount, then in the case of seats you will have to replace the cylinder head. Tuning is often performed, which requires the installation of a new, lighter camshaft on the VAZ 2106.

Purpose and design of the drive

The gas distribution mechanism is responsible for supplying the fuel mixture to the cylinders and releasing exhaust gases. To ensure timely opening of the intake and exhaust valves, the camshaft must rotate synchronously with the crankshaft. In the Zhiguli, this function is assigned to a chain drive installed in the front of the engine.

Replacing the timing chain and gears cannot be classified as complex operations, but the procedure is quite labor-intensive. To do the work yourself, you need to understand the operating principle and design of the drive, which consists of the following elements:

• a small-diameter drive gear is installed at the front end of the crankshaft;
• above it there is an intermediate large sprocket, which is responsible for rotating the drive of the oil pump and distributor;
• a third driven gear of large diameter is attached to the end of the camshaft;
• The 3 above stars are connected by a double-row chain;
• on one side, the chain is tensioned by a curved shoe, which presses the plunger device;
• to prevent the weakened chain from beating, a second shoe is provided on the other side - the so-called damper;
• A limit pin is installed near the drive sprocket, which prevents the chain from jumping off the teeth.

The main role in the mechanism is played by a double-row chain connecting the lower driving gear with the driven ones.
The required tension of the VAZ 2106 timing drive is provided by a plunger device supporting a semicircular shoe. Older cars were equipped with a purely mechanical plunger - a retractable rod with a powerful spring, which had to be tightened manually. Later models received a hydraulic chain tensioner that operates automatically.

Unknowingly, I once found myself in a stupid situation. A friend’s chain on the “six” was stretched out and began to make a lot of noise, I advised it to be tightened. On site it turned out that the plunger fixing bolt was missing; the advice turned out to be useless. Later it turned out that the car has an automatic tensioner that is activated by oil pressure. The stretched chain had to be replaced.

The timing drive is lubricated by engine oil coming from the camshaft. To prevent lubricant from splashing, the mechanism is hidden behind a sealed aluminum cover, screwed to the end of the cylinder block with 9 M6 bolts. Another 3 screws connect the protective casing to the oil pan.

So, the chain drive performs 3 functions:

• rotates the camshaft, which alternately presses the cams onto the valve stems;
• through a helical gear (in driver's jargon - “pig”) transmits torque to the oil pump;
• rotates the shaft of the main ignition distributor.

Removing and installing the camshaft

Removal is most often necessary either during a major overhaul or for replacement in cases of failure. To carry out the work, the following tools are required:

• heads for 10, 13 and 17;
• handle with ratchet;
• knob;
• extension cord with cardan;
• socket wrench 13;
• device for mounting and dismantling the VAZ camshaft.

First, the valve cover is removed, which is bolted to the cylinder head and has a rubber gasket. Try not to damage it, otherwise oil may leak in the future. After this, the timing chain tensioner is unscrewed. It is located on the right side of the engine when viewed from the interior. The camshaft gear is turned by the head to 17.

For convenience, place the car in gear and place wheel chocks under the rear wheel. Move the gear to the side; if necessary, you can pry it off with a convenient tool. Now all the nuts that secure the camshaft housing must be unscrewed. To make the job easier, use a wrench first.

How to adjust valves on a VAZ 2106?

On a VAZ 2106 car, it is recommended to adjust the valves every 10-15 thousand km. mileage The optimal value has been selected, because all this time the engine will operate stably. When the gap changes, minor “defects” will begin to appear: valve knocking with a sharp increase in speed, a decrease in throttle response and engine power.

The problems go so far as to cause the engine to stall at high speeds at operating temperature. It is also necessary to adjust the valves after carrying out work related to repairing or replacing the camshaft. In this case, adjustment is inevitable, since the 2 camshafts may differ from each other. To work you will need the following tools:

• a set of keys;
• open-end wrench 17 with good leverage;
• special key 38 for turning the crankshaft;
• flat probe 0.15 mm thick.

If you look closely at the case in which the dipstick is stored, you will see several numbers indicating the sequence of valve adjustment. Pay attention to the temperature: 20 °C is optimal for setting. But if before this the VAZ camshaft was replaced, and the weather is warm, then you don’t have to look at the temperature.

So, first remove the cylinder head cover. Please note that the valves should be counted from the front edge of the internal combustion engine. After this, put the piston of the 4th cylinder in the upper position using a 38 key. Valves “6” and “8” are closed, therefore, the gap between the lever and the cam will be the largest. Place the dipstick and check the gap. The optimal one is one in which the probe can be moved with some effort. If the gap is smaller or larger, the dipstick does not move or passes freely, then proceed with adjustment.

To do this, you need to work with two 17mm wrenches: with one you loosen the lock nut, and with the second you turn the bolt to adjust. Moreover, you should not make many turns with the adjusting bolt; you need to slowly move the feeler gauge while unscrewing or tightening it, so as not to miss the permissible gap value. Afterwards, the locknut must be tightened and once again make sure that the gap is correct. If necessary, the valve is re-adjusted. Valve adjustment procedure:

The crankshaft rotates 180°, which corresponds to a quarter turn of the camshaft. To control the position, it is necessary to use the marks on the crankshaft pulley, as well as on the camshaft. As a last resort, simply remove the distributor cover and perform control using the slider.

Please note that one revolution of the crankshaft is half a revolution of the distributor axis. After the adjustment is completed, assembly is performed. If the rubber gasket is damaged, it should be replaced with a new one.

Symptoms

To understand that the valves on the VAZ 2110 engine need adjustment, it is enough to know the behavior of the engine

After prolonged use, the car owner may notice that the engine has begun to work somehow differently. This fact should be alarming, because the consequences can be serious.

The main symptoms of a faulty valve mechanism adjustment on a VAZ 2110 look like this:

• the engine is noisy when starting up after a long period of parking (clacks);
• compression in the cylinders disappears (the engine loses its former power);
• Valve cover gasket leaks oil;
• “shots” appeared in the carburetor or muffler;
• fuel consumption has increased.

The listed signs can be diagnosed independently, without resorting to the services of a car service. Before you put the VAZ 2110 in for repairs and begin adjusting the valves, you should prepare a mechanic’s tool: a micrometer, a rack for pressing the pushers and a multi-part feeler gauge. The last thing to measure is the thermal gap between the camshaft cam and the adjusting washer. Instead of a rack, it is possible to use two powerful slotted screwdrivers.