Overhaul of VAZ 2109 engine

The most typical problems caused by engine failure on the VAZ 2109 are the following:

rapid wear of seals and seals;
engine oil getting into the air filter housing;
increased engine oil consumption;
white smoke from the exhaust;
increased coolant consumption;
strong smoke from the breather.

To eliminate these problems, it is necessary to carry out troubleshooting and subsequent repair of the cylinder block.

Overhaul of VAZ 2109 engine

The power unit is the most durable part of a car when used correctly. But even it requires major repairs after a certain period of time. The timing of the overhaul depends on the timeliness of the technical inspection and ongoing repair work. With proper engine care, major repairs of the VAZ 2109 engine can be avoided until the odometer reaches 150,000 km. If you use the power unit irrationally, repairs may be required much earlier.

Overhaul of the VAZ 2109 (KR) engine involves disassembling the engine into parts, carrying out diagnostics, repairs, and, if necessary, replacing individual components and assemblies. Typically, engine components are repaired by metalworking the elements, then the crankshaft is ground, the cylinder head is milled, and the engine block is cleaned and processed. If you are the owner of an imported car, it is better to entrust this procedure to professionals - service station employees. And Lada Samara drivers can easily repair a VAZ 2109 engine with their own hands, knowing the technology and the sequence of work.

Factors for the need for CR

To identify the need for a major overhaul of the Nine, you need to monitor the “symptoms” of your specific car. There are cases when, to eliminate a malfunction, it is enough to make do with scheduled repairs or spot replacement of components. But in some situations, such “refreshing” is not enough, and a faulty unit requires a radical restoration.

It is a mistake to believe that the most important criterion by which the overhaul period of the Lada 2109 is determined is mileage. This is not entirely true. If the driver carefully operates the engine, carries out timely maintenance, replaces the oil filter, oil, and coolant, then even when the indicator reaches 100–150 thousand km on the instrument panel, the car is not in danger of major repairs. And it happens the other way around. With a relatively low mileage, but irrational use of the engine, diagnostics show the need to completely repair the power unit.

The mileage goes on, and the need for major repairs is indicated by specific signs:

oil consumption increases;
compression (compression) in the cylinders decreases;
fuel costs increase;
There is a knocking sound in the VAZ 2109 engine.

An increase in oil consumption in the absence of leaks indicates wear of the piston rings and the inevitability of major repairs. If the engine is breathing, that is, oil leaks occur, you can get by with scheduled repairs. The frequency of replacement is also affected by the condition of the guide bushings and oil seals.

The second factor is the deterioration of the crank mechanism (crank mechanism). The quality of performance of the functions of the crankshaft is indicated by the compression value (maximum pressure in the combustion chamber at the greatest compression of the piston). This indicator can be measured using a pressure gauge, which is fixed in place of the pressure sensor. In this case, the engine must be running. We compare the obtained values with the passport compression indicators (for the VAZ 2109 it should be in the range of 9.5–13 atmospheres). If the measured value does not reach the norm, there is severe wear of the bearings or hydraulic pump.

You cannot ignore such signs as a decrease in the stability of the internal combustion engine, the appearance of characteristic sounds (tapping, tinkling) at idle speed, an increase in gasoline consumption and a decrease in traction. There are times when the engine smokes. If one of these symptoms appears, you can do without major repairs, but if the problems appear in a complex and the engine does not pull, then, most likely, diagnostics will show the need for extensive engine repairs.

If the unit is running to the point of emergency, the VAZ 2109 engine may need to be replaced.

General overhaul technology

A major overhaul of the VAZ 2109 internal combustion engine is used to completely restore the nameplate technical characteristics of the power unit. The main stages of repair work are as follows.

Replacing piston rings.
Grooving of cylindrical rings.
Cleaning and processing of the crankshaft.
Replacing bearings.
Cylinder head repair.

During the repair process, the piston rings are replaced, and the cylinder rings are ground and finished. This must be done using turning equipment, so it is better to entrust this procedure to specialists. Due to the bore of the cylinders, it is necessary to replace the pistons with new ones; To replace the piston, special mandrels are needed.

The crankshaft often requires a good cleaning and treatment. Due to its structure, this element is susceptible to clogging with dirt and debris. When the lubrication hole is clogged, the crankshaft journals do not receive enough lubrication, which leads to a decrease in crankshaft efficiency.

It is necessary to replace the main and connecting rod bearings, because their wear causes Lada engine malfunctions. A very important step is repairing the cylinder head. Support plates, valves, and return springs are repaired (replaced).

When carrying out a major overhaul of an internal combustion engine, do not forget about the accompanying devices: generator, injector, fuel pump, thermostat. If malfunctions are also detected in their operation, the unit should be repaired or replaced.

Before you start working on the engine, you should decide what procedures you will perform yourself (disassemble, sort through, clean, process). It is better to entrust cylinder boring to a specialist. The quality of the repair also depends on the location where it is carried out.

It is most convenient to carry out the inspection in a garage with its own inspection hole.

Next you need to decide how to remove the engine. Ideal if you have a hoist (a hanging device consisting of a block, a cable and a metal chain) and a sling. This will make it easier to remove the VAZ 2109 engine. For convenience, prepare in advance a stand for the cylinder block: a pallet or a tire. After this, you can begin such steps as disassembling the VAZ 2109 engine, repairing and replacing all necessary faulty and worn elements, and assembling the engine.

Disassembly, repair and installation of the engine

To begin, drain the operating fluids and detach the attachments and auxiliary elements. Next you need to disconnect the unit from the gearbox. Now you can pull out the block using a hoist.

Stages of work	Your actions
How to disassemble the engine in order to return everything to its place during reassembly?	Having installed the unit on a stand, remove the cylinder head and crankshaft. When disassembling, you should mark where this or that part was removed from so that you can install it (or a new one) back without problems. Having disassembled the block, you can begin repair work, boring and processing. We clean all parts that are suitable for use and install them back; the rest are replaced.
Next, you need to figure out how to assemble a VAZ engine.	Inserts are installed in the “bed” (installation location) of the block according to the marks made and the antennae on the insert, which should fit into the grooves. We blow with compressed air, clean and lubricate the crankshaft, then it is placed on its supports. We also secure the liners strictly in place in the cover of each main bearing, then mount the bearing caps.
It is very important to check the condition of the mounting bolts.	Bolt wear or distortion when tightening is unacceptable. If such signs occur, we will definitely replace them with new ones.

The piston group is replaced in most cases. If desired, it can be restored using special equipment, but this can be even more expensive. We insert the piston assembly with the connecting rod inside the cylinder. Then we place the connecting rod in the groove of the crankshaft journal, insert the liners, and lubricate all the parts. We mount the lower covers on the connecting rods (each connecting rod has its own cover).

We fix the oil pressure sensor and other auxiliary parts. This completes the installation of the VAZ 2109 engine.

Oil pump and cooling system

Improving these components is extremely necessary when carrying out tuning. Lubrication of all units may be insufficient, as torque and power increase due to the lighter weight of the main elements. Carefully troubleshoot the oil pump gears so that the gaps are minimal. As for the cooling system, it would not be a bad idea to install a more efficient pump and a radiator with a larger area. A major overhaul of the 2109 engine, provided that there is no need to do tuning, can be done without these procedures.

dismantling the engine of VAZ 2108, VAZ 2109, VAZ 21099 – engine repair

1. Remove the engine from the VAZ 2108, VAZ 2109, VAZ 21099 (see “Removing the engine”). 2. Place the engine on strong supports. 3. Carefully remove the gearbox. Make sure that the splined end of the input shaft does not rest on the diaphragm spring petals. 4. Remove the clutch from the engine (see “Clutch repair” in section 5 “Transmission”). 5. Remove the camshaft drive belt, the tension roller and the spacer washer installed under it (see “Replacing the camshaft drive belt on VAZ 2108, VAZ 2109, VAZ 21099 cars and adjusting the belt tension”) (see “Replacing the tension roller”) . 6. Remove the camshaft gear (see “Replacing the cylinder head gasket”).

VAZ 2109 engine repair

57 8 43k

121 2 105k

Calculator for calculating the working volume of an internal combustion engine

Calculator for calculating the cylinder displacement of a car engine

The most typical problems caused by engine failure on the VAZ 2109 are the following:

rapid wear of seals and seals;
engine oil getting into the air filter housing;
increased engine oil consumption;
white smoke from the exhaust;
increased coolant consumption;
strong smoke from the breather.

To eliminate these problems, it is necessary to carry out troubleshooting and subsequent repair of the cylinder block.

Types of cylinder wear on the VAZ 2109

The most common types of cylinder wear in the VAZ 2109 engine are as follows:

barrel wear;
oval wear;
scoring on the cylinder walls;
matte color on the cylinder mirror.

How to troubleshoot and repair a VAZ 2109 engine

The work on troubleshooting and repairing the Nine engine is carried out in several stages:

1.Before starting work, be sure to clean the surfaces of the cylinder block from old sealing gaskets. Next, a visual inspection of the unit is carried out. Particular attention should be paid to the places where the holes for the bolts are located. If cracks are detected, the cylinder block must be replaced.

2.Check the mating surface for distortion. This is done using a ruler, which is placed along the plane and diagonal axes (the process is shown in Fig. 1). If the curvature of the plane is more than 0.1 mm, then the cylinder block is replaced.

3.Check the tightness of the cylinder block cooling jacket. To do this, you need to close the hole for connecting the pump, and pour water into the jacket itself under a pressure of 0.3 MPa. If no leakage appears from the block within 5-10 minutes, then it is in good working order. Otherwise, it needs to be replaced.

4.Visual inspection of cylinders. In their upper part, carbon deposits usually form, which need to be removed. If burrs, scratches or other defects are found on the cylinder walls, they are bored. For this, 2 repair sizes are provided - 0.4 and 0.8 mm. If there is damage on the walls of one of the cylinders with a depth of more than 0.8 mm, then the block needs to be replaced.

5.Measure the diameter of the cylinders. This is done using a bore gauge. Measurements are carried out in the transverse and longitudinal directions. The amount of wear on the cylinders is determined as follows: you need to measure the cylinder at the location of the upper belt (since the cylinders do not wear out there) and in the remaining belts, then you need to find the difference, which will show their wear. This process is shown in Fig. 2.

If the wear does not exceed 0.15 mm, then you can get by with honing the cylinders. Otherwise, they need to be bored to the nearest repair size of the pistons, while leaving room for honing.

Overhaul of VAZ 2109 engine

Repairing the engine of any car is a very scrupulous and rather labor-intensive task, requiring not only experience and knowledge, but also certain specific equipment. Therefore, it is advisable to entrust this matter to companies that professionally repair cars, even when it is not a foreign car, but a VAZ 2109 device from the domestic automobile industry. They will repair the VAZ 2109 engine in the shortest possible time, the price of which will not greatly affect your pocket, compared to costs that can be incurred by repairing it yourself, in a home garage.

But still, if you decide to carry out a major overhaul of the VAZ 2109 engine yourself, then the following knowledge will be useful to you.

Some repairs can be done without removing the engine. First you need to wash the engine compartment, also rinse the engine with water running under pressure. This will help prevent contamination of its internal elements. To increase the working area required for repairs, you need to remove the mudguards and hood. Without removing the engine, you can replace the gaskets:

oil pan;
cylinder heads;
exhaust and intake manifolds;
front and back covers.
and also replace the crankshaft oil seal.

Without dismantling the engine, you can unscrew the water pump, generator, starter, exhaust and intake manifolds, carburetor, fuel pump and ignition distributor. Due to the ability to remove the cylinder head without removing the engine, the valve mechanism can be repaired. You can also check the timing belt, front cover seals, oil pump, timing belt pulleys and, if necessary, replace them.

It is not advisable, but in some cases, it is possible to replace piston rings, connecting rods, pistons, and connecting rod bearings without removing the engine, as well as hone the cylinders.

The need to overhaul an engine is difficult to determine by its mileage or its service life, since timely maintenance - changing the oil and air filter - greatly extends its service life. To determine the need for a major overhaul of the engine, diagnostics must be performed. Only based on its results, it is possible to determine which mechanisms are badly worn and require repair or replacement. Increased oil consumption in the absence of leaks indicates wear of the piston rings, as well as the guide bushings of all valves. If there is increased noise or knocking when the engine is running, it is most likely necessary to change the main or connecting rod bearing shells. By first unscrewing the pressure sensor and checking the oil pressure with a pressure gauge, you can determine whether it is necessary to replace the oil pump or support bearings. The need to replace them will be indicated by low oil pressure compared to technical standards. If there is a loss of power, failures in engine operation, increased noise of the gas distribution mechanism, or increased fuel consumption by 100%, a major overhaul of the engine is necessary. Especially when these signs occur simultaneously and the adjustments do not improve engine performance, then repairs are definitely not possible.

To determine the entire scope of work required for a major overhaul of the engine, you need to use measurements to find out what compression is in the cylinders and check the combustion chamber for leaks. Such work can only be carried out by a specialist who has the necessary equipment.

Only a thorough check of the technical condition of the engine will make it possible to determine whether it is necessary to buy a new repair cylinder block or whether it is possible to repair the engine using the old one.

In the process of preparing for a major engine overhaul, it is necessary to determine the scope of work and study in detail the mechanics of its implementation. In terms of time, a major overhaul of the motor lasts about two weeks, taking into account the need for grinding and boring, which can only be done in specialized workshops. The repair time may be delayed due to the lack of necessary spare parts and special tools, which it is advisable to purchase in advance. A major overhaul of the engine is carried out to completely restore its performance characteristics. During this process, the piston rings are replaced, and the cylinder walls are bored (or honed) to repair size. After repairing the cylinders, it is necessary to install new pistons. Replace the bearings (connecting rod and main bearings), grind the crankshaft to restore the required clearances with the bearings. Often the valve mechanism is not changed, since its condition at the time of repair is already satisfactory. When overhauling an engine, the carburetor, generator, starter, and ignition distributor are also repaired. In general, with such engine repairs, if necessary, repair or replacement of all associated units is also carried out. Therefore, at the time the engine repair is completed, it will be as good as new and can serve the car owner for many years to come.

It should be noted that major repairs of the VAZ 2109 engine must be carried out very scrupulously, in a clean room, and then it will reciprocate your feelings - it will work flawlessly for a long time.

How to determine a motor malfunction

The engine of a VAZ 2109 car, together with the gearbox and clutch, constitute a power unit, which makes up a single unit located on three rubber-metal elastic supports fixed in the engine compartment. Some faults can be diagnosed independently:

Increased clearances in the assembly, very early ignition or insufficient oil pressure are indicated by a metallic, dull sound of the crankshaft main bearings.
A large gap in the bearings or insufficient oil pressure can be indicated by a sharp knock in the connecting rod bearings.
Replacement of pistons or piston rings will be necessary when the piston knocks, which is caused by its beating in the cylinder.
A broken valve spring or mismatched clearances can be characterized by a uniform, constant knocking sound in the valves. To identify worn elements, you need to perform a visual inspection of the unit.
The ingress of foreign particles under the oil pressure valve and failure of the oil pump can be determined by insufficient oil pressure at idle when the engine is warm. When using low-quality motor oil, such problems may also arise.
Excessive pressure in the oil lubrication system indicates that the pressure relief valve is stuck or its spring is too stiff. After replacing the appropriate elements, this problem is eliminated.
An increase in oil consumption can be caused by increased wear of piston rings, engine seals, valve stems, guide bushings, and oil seals.

VAZ 2109 engine repair

Many consider considerable mileage as a sign of the need for engine overhaul. But even insignificant mileage does not guarantee the normal operating condition of the engine. The quality of car servicing and its frequency play a big role here. If oil changes, filters and other engine care activities occur regularly, then most likely it will last many thousands of kilometers. If this is done rarely, carelessly, or if the engine is not maintained at all, it will soon need a major overhaul.

If the engine is using too much oil, you need to check for leaks. If it is missing, it is necessary to check the condition of the oil seals, piston rings and guide bushings. First, the pressure in the cylinders is checked to assess the condition of the piston. You can do this yourself - you need to install a pressure gauge instead of a pressure sensor. If the pressure is low, this may indicate wear on the hydraulic pump and/or bearings. If, when the engine is running, you hear knocking, a strange noise, there is a loss of power, or an increase in consumption, then most likely it needs a major overhaul. Naturally, you can try to tune the engine first; if this does not bring results, then normal mechanical work will be required.

A high-quality engine overhaul involves the restoration of all values of the characteristics of this unit specified in its specification.

When overhauling the VAZ 2109 engine, you should also check and, if necessary, change the generator, starter and distributor.

You can do most of the engine overhaul yourself. To find out the amount of work that is best entrusted to a specialist in a car service center, you need to disassemble the engine and inspect all its parts to assess their condition. You should not purchase spare parts before starting to repair the VAZ 2109 engine. You should always first analyze all engine components, since they can be so worn out that it will be much cheaper and easier to buy another one. In addition to financial costs, overhauling the VAZ 2109 engine requires quite a lot of time. By the way, trying to save money by installing non-standard or old parts often turns out to be many times more expensive.

How to determine a motor malfunction

Increased clearances in the assembly, very early ignition or insufficient oil pressure are indicated by a metallic, dull sound of the crankshaft main bearings.
A large gap in the bearings or insufficient oil pressure can be indicated by a sharp knock in the connecting rod bearings.
Replacement of pistons or piston rings will be necessary when the piston knocks, which is caused by its beating in the cylinder.
A broken valve spring or mismatched clearances can be characterized by a uniform, constant knocking sound in the valves. To identify worn elements, you need to perform a visual inspection of the unit.
The ingress of foreign particles under the oil pressure valve and failure of the oil pump can be determined by insufficient oil pressure at idle when the engine is warm. When using low-quality motor oil, such problems may also arise.
Excessive pressure in the oil lubrication system indicates that the pressure relief valve is stuck or its spring is too stiff. After replacing the appropriate elements, this problem is eliminated.
An increase in oil consumption can be caused by increased wear of piston rings, engine seals, valve stems, guide bushings, and oil seals.

How much does it cost on average to overhaul an engine on a VAZ-2109?

The cost of overhauling a VAZ 2109 engine in Russia varies from 10,000 to 40,000 rubles .

What is the service?

The engine is the key part of the car. Without it, it will not be able to perform its main function as a means of transportation. If the engine breaks down, there is a risk of losing control of the car on the road, so repair or replacement of this part should be carried out immediately when a malfunction is detected.

Carrying out a complete diagnosis and major repair is not so easy and it is not done everywhere. Especially when you consider that the car model is not the most common and certainly not a new product. Although there are skilled handicraftsmen who can carry out major repairs for a very modest fee, none of them can guarantee the quality. In addition, you will still have to pay extra for replacing engine components, so the savings in the end will not be so significant.

What determines the cost of a major overhaul of a VAZ 2109 engine?

Although the repair is called a major overhaul, this does not mean dismantling the old engine and assembling a new one from scratch. Usually this means replacing some components, cleaning, lubricating and protecting against rust. There are some other nuances that you also need to know:

The condition of the engine - if it simply falls apart, then even if it can be sorted out and repaired, it will be very expensive and will take a long time to do.
The condition of the car - any auto mechanic can remove a part from a car in good condition, but if everything under the hood is rusty, smeared with fuel oil or something else. In short, if the car is unkempt, then repairs will take a long time and will be expensive, and most likely you will still need to pay for car wash services.
Engine model - despite the fact that the car brand is known - VAZ 2109, the engine is different from the engine. Improved units with a variety of properties are still sold for the “nine”. The more expensive the engine itself, the correspondingly more expensive the overhaul will cost.

Taken together, all factors can double or even triple the final cost of a major overhaul. It’s rare, of course, when this can happen, but it’s definitely worth keeping this possibility in mind. It’s easier to take care of your car than to overpay for even minor repairs because of this.

Types of major repairs and cost differences

An engine is a complex mechanism in which any of the components can break. Major repairs may be required if the part breaks in several places. In pricing policy, the relationship is simple - the more damage, the more money you will have to pay. The complexity of the repair is often determined by the number of breakdowns and the general condition of the part.

If sand is already falling from the engine due to age, oil is leaking and the shaft is knocking, then you need to prepare for a serious financial blow. If something happens to the cylinders, even if nothing else is damaged, a major overhaul will still be needed.

Examples of the cost of overhauling a VAZ 2109 engine

In Moscow and St. Petersburg, it will cost at least 18,000 rubles . In the Far East, the same thing will be somewhat cheaper, already about 12,000 rubles . If the car is almost falling apart, in Moscow you will need to pay about 30,000 rubles . In the regions it is almost 10,000 rubles less. Information taken from free online message boards and online auto repair shop resources.

Cylinder block

In any case, it needs to be repaired. First of all, clean the entire surface of oil, dirt and other deposits. The repair consists of boring the sleeves to the required size. You cannot carry out this procedure yourself; it is better to trust a specialist. The lathe who carries out the boring must have the skills to operate the machine. Do not trust such a task to an inexperienced person. Its reliability depends on how correctly the overhaul of the VAZ 2109 engine is done.

There are two boring options: under the mirror and with a fine mesh. In the second case, honing is done - the entire inner surface of the liners is covered with thin lines. Some people claim that this gives a boost in power. But in reality, the picture is the opposite - the wear of the piston rings increases, since the surface of the cylinder is similar to an ordinary file. Fortunately, this continues for 10-20 thousand km, after which the sleeve takes on a mirror-like appearance. Moreover, the geometry is not always ideal. For this reason, it is better to carry out boring under a mirror.

Lada 21099 VAZIKI VAZIKI › Logbook ›

It often happens that the internal combustion engine (ICE) of your car breaks down and requires serious intervention. In such cases, engine overhaul is an inevitable thing that should be resorted to as soon as possible. If you delay this matter, there is a possibility of serious damage to the engine and its complete failure.

Engine overhaul is primarily associated with its complete disassembly, diagnostics, repair and metalworking of some of its elements or replacement of parts. Whether it is a major overhaul of a VAZ 2109 engine or any other VAZ model, metalworking may involve grinding the crankshaft, milling the cylinder head, or honing the cylinder block. Even with simple disassembly and reassembly of the engine, it is always necessary to take into account that you will have to replace the piston rings, main and connecting rod bearings and valve seals. But this cannot be called a major engine overhaul. Rather, diagnostics and regular updates. In this case, such manipulations will not help the engine to provide a noticeable increase in service life, they will only give a temporary change in the quality of its operation.

Is it worth lightening the pistons?

If you are interested in the idea of tuning in order to increase power, then the answer is clear: it is necessary to lighten the pistons! But if it is in your interests only to make repairs, then it is enough to install new ones. In any case, the increase in horsepower will be noticeable, as engine compression will increase. It is best to entrust the work of lightening to the same turner who is engaged in boring the cylinder block. As you can see, you cannot do a major engine overhaul with your own hands; you will have to resort to the services of specialists.

The essence of the process is to get rid of the “excess” metal in the internal part. To do this, the aluminum from the piston skirt is carefully ground off. Pay attention to whether there are scrapes - recesses for valves in the upper part. If they are present, then purchase repair ones with the same attributes. Otherwise, you will need to rebuild the engine every time the timing belt breaks. And don’t forget that each piston requires rings of the appropriate size - all values can be found in the car’s owner’s manual.