The procedure for adjusting valves on an 8-valve VAZ-2110 with your own hands

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 alert you, 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. An installation kit (clamp and probe) is sold in most Auto Parts stores. Its cost varies from 200 to 500 rubles. Correct installation of valves on a VAZ 2110 8 valve injector or carburetor is the key to success.

How to adjust valves on a VAZ 2110

There is no need to purchase shims in advance. They are relatively expensive. Initially, you have to establish the size of the gaps and only then buy the required number of washers with the exact dimensions. It is better to carry out work in a garage with good lighting. The roof and walls will protect from unwanted wind and rain, which can carry dirt into the open camshaft.

Attention! Before adjusting the valve mechanism on the VAZ 2110, the engine must be cooled.

Disassembly

If everything is ready, then we proceed to the first part of the repair - dismantling the parts:

• disconnect the terminal from the battery;
• remove the air filter housing (on a carburetor engine);
• disconnect the crankcase gas hoses and the throttle cable bracket from the valve cover;
• unscrew the bolts of the timing case. Remove the cover and gain access to the pulley;
• unscrew the spark plugs (this will make it easier to rotate the crankshaft to find TDC and BDC);
• Unscrew the valve cover nuts and remove it.

Before direct tuning, you should remember the mechanism of operation of the timing belt. Namely, the operating order of the valves (in our case, a VAZ 2110 with an 8-valve injector).

The procedure for adjusting the valves on a VAZ 2110 with an 8-valve engine must be performed in the same sequence as in the table. As for installing valves on a VAZ 2110 with 16-valve engines, the diagram looks completely different.

Adjustment

After removing the valve cover, it is necessary to remove any remaining engine oil near the tappets. This can be done with a medical syringe or a rubber bulb. If there is a retaining rod, you should install it on the two outer studs intended for fastening the cylinder head cover.

Then, we proceed to the second part of the repair and do the following:

1. We set the top dead center by aligning the marks of the camshaft pulley and the inner timing case. There are two ways to do this. Hanging and rotating one front wheel. Use a spanner wrench (head) to rotate the camshaft by the pulley mounting bolt, but this operation is dangerous due to breakage of the mounting bolt;
2. After finding the top dead center, turn the camshaft slightly so that the pulley moves 40-50° from TDC (this is 2.5-3 teeth). We put our mark, from which we will then rotate the camshaft several more times, making additional marks;
3. We measure the thermal clearance of the first valve (exhaust) by slipping one of the feeler gauges (0.35/0.4/0.45 mm) between the camshaft cam and the pusher. Nominal clearance 0.35 mm;
4. if the first probe passes freely, then take a larger size (0.4 mm). The pitch is 0.05 mm;
5. if the 0.4 or 0.45 probe does not pass, then it is necessary to replace the adjusting washer;
6. We turn the pusher with the groove towards us, press it with the lever of the locking rack and take out the used washer with tweezers. Its inner side contains numbers with the original size;
7. to calculate the required value, you must use the formula H = B + (A - C). Where:
   H—thickness of the new washer, mm;
8. B—thickness of the used washer, mm;
9. A - measured gap, mm;
10. C—nominal gap, mm.
11. The resulting result H is written down in a notepad. You will have to buy a washer of this exact size for the repair valve, rounding up the value;
12. according to the table, we move on to the third valve (intake), its nominal clearance is 0.2 mm;
13. measure the gap by inserting feeler gauges in order: 0.2/0.25/0.30 mm;
14. write down the size of the probe, which is not included in the thermal gap;
15. take out the washer and calculate the repair size using the above formula;
16. then, according to the table, we turn the crankshaft several times to the indicated degrees and perform the operation with all the valves;
17. We go to the store and buy the required number of adjusting washers of the required thickness, according to calculations;
18. We install the washers in the pushers, according to the notebook;
19. all valve clearances on the VAZ 2110 should be restored to the nominal sizes of 0.2 and 0.35, thanks to the use of adjusting washers;
20. checking new thermal gaps;
21. after replacing the washers, it is necessary to put the dismantled parts in place;
22. we start the engine and observe its operation.

It is recommended to replace the cylinder head cover gasket on a VAZ 2110 (8 valves) with an injection engine, after adjusting the valves.

Reasons for replacement

As mentioned above, the reason for replacing the valves may be a broken timing belt, but this is not always the only reason. Often the valves need to be replaced due to the motor chain jumping. When this happens, the valves simply turn out and it is clear that their further operation becomes impossible. After this, the valves look like this:

Replacing valve guides for VAZ 2110

In addition, the valves themselves may wear out. More precisely, it is the valve stem, which has a certain size, that is subject to wear. The leg is specially measured with a micrometer to check compliance with the standards. So, if the valve stem has a size that is less than 7.97 mm, then this is wear and tear and such a valve should be sent to the trash bin. Finally, a burnout or crack in the plate itself may cause the valves to be replaced.

Replacing valve guides on a VAZ 2110

Valve adjustment frequency

After using the car for a long time, its owner may notice that the engine is no longer performing as well as it was before. In principle, all changes in engine operation should always alert the driver, since this is often fraught with quite serious consequences. In most cases, adjustment of the VAZ-2110 valves (8 valves) is required if the following symptoms are present:

• excessive noise when starting the engine after the car has been idle for a long time;
• lack of compression in the cylinders (a noticeable decrease in engine power);
• oil leaks through the cover gasket;
• regular “shots” in the muffler or carburetor;
• increased fuel consumption.

It is not necessary to go to a specialized car service in order to diagnose the above problems.

Preparatory stage

It starts with turning off the on-board power supply to the car, for which the terminals are removed from the battery and it is necessary to drain the old engine oil into a prepared container through a service plug and coolant from the engine crankcase, this is done by disconnecting the lowest radiator pipe from the cylinder block, the only precaution is Carrying out the procedure on a cooled engine, otherwise you can get your hands burned!

Spare parts and tools for work

Before starting work on replacing valves on a VAZ 2110, high-quality new parts are purchased, the names and original articles of which are as follows:

1. Set of gaskets: valve cover (art. 2108-1003270/77) and cylinder head (art. 21083-1003020), intake and exhaust manifolds (set art. 21083-1008081), exhaust gas intake pipe (art. 2103-1203020-04) , as well as an oil seal (art. 2108-1005034) and oil flinger rings (art. 2108-1007026-86) (the so-called cylinder head repair kit)
2. New valves for the fuel mixture intake system 4 pcs. (art. 21083-1007010)
3. New exhaust system valves 4 pcs. (art. 2108-1007012)
4. Valve guides 8 pcs. (art. 2108-1007032-87)
5. Engine coolant
6. New bolts securing the cylinder head to the cylinder block (art. 2108-1003271Н/О)
7. Timing belt (art. 2108-1006040-86) and generator drive belt (art. 1000012562)
8. Engine oil and oil filter

Repairs to replace worn-out parts are carried out using a standard set of tools, which are usually sold as a set, namely:

• a set of open-end wrenches marked from 8 to 21 mm;
• set of internal hex keys;
• a set of sockets with a diameter from 8 to 24 mm;
• valve desiccant;
• screw valve guide puller;
• torque wrench (needed for proper tightening of the camshaft, cylinder head and camshaft gear bolts);
• Screwdriver Set;
• electric drill;
• specialized lapping paste of two types (for rough lapping of valves to their working surface of the combustion chamber and for finishing grinding);
• gloves to protect hands from possible damage.

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The availability of tools, parts and a covered room will allow you to carry out troubleshooting work yourself, since the price of replacing 8 valves on a VAZ 2110 in non-certified services in the fall of 2021 varies from 30 to 45 thousand rubles. At a certified service station of official dealers, such work will cost more than 50 thousand, which will greatly affect the financial situation of the car owner.

Preparing and disassembling the mechanism

Adjusting the clearances in the valve drive

To carry out the work, you will have to purchase a special device for pressing the pushers and a set of adjusting washers of various thicknesses - you will not be able to do without them. If you constantly plan to make adjustments yourself, then this purchase will help you save money on car service costs. With a one-time promotion, purchasing devices is impractical; it is better to immediately contact the specialists.

To disassemble and adjust the clearances under the cams, you will need the following tools:

• a pair of flat probes with a thickness of 0.2 and 0.35 mm;
• a regular plumbing kit with screwdrivers and pliers;
• tweezers;
• sets of ring and open-end wrenches;
• spark plug wrench.

Since during the adjustment process you will have to repeatedly turn the crankshaft, to facilitate rotation it is recommended to unscrew all the spark plugs, having first removed and put the high-voltage wires aside. Further disassembly includes:

1. Disconnecting from the valve cover all pipes that interfere with its removal.
2. Unscrewing the valve cover and removing it. You need to make sure that the rubber bushings do not get lost from the holes.
3. Removing the gasket.
4. Removing the plastic timing belt cover.

After wiping off any oil stains on the cylinder head flange where the gasket was located with a rag, you can begin tuning.