Replacing rings on a VAZ 2109 without removing the engine

Methods for replacing valve stem seals on a VAZ 2109 Print this article Font size -16+

Despite their small size, valve stem seals play a big role in the operation of the VAZ 2109 engine.

The task of these elements is to reliably seal and protect against oil ingress into the contact areas of the guide bushings and valves.

Appearance of elements

Over time, the caps wear out because they are constantly exposed to a fairly aggressive environment, which is engine oil. The temperature changes regularly, exhaust gases affect it, and overheating occurs.

In other words, there are more than enough reasons for the caps to wear out. Your task is to identify the problem in time and replace the elements.

Step-by-step replacement instructions

Piston repair work must be performed on an inspection ditch, lift or overpass.

What will you need?

To repair a VAZ 2109 engine with your own hands, you need the following tools:

a set of keys;
set of heads;
funnels;
extension cords;
torque wrench;
set of feeler gauges; set of feeler gauges for measuring gaps
mandrel for pressing products on the piston;
hammer;
needle file;
new repair kit. New consumables for piston VAZ 2109

When purchasing piston rings for the VAZ 2109, you should take into account the material of manufacture and their width. It is better to purchase original products to avoid fakes.

Stages

First of all, you need to dismantle the cylinder head with your own hands.
Then you need to remove the engine oil pan.
After rotating the crankshaft, install it so that the connecting rod mounting nuts extend as far as possible.
After unscrewing the fastening nuts, remove the connecting rod caps.
Using a hammer, tapping lightly, remove the piston with connecting rod from the cylinder.
Having opened the gap with your fingers, you need to remove all three products from the groove in turn and dismantle them from the piston. Together with the oil scraper, its expander is removed. Use your fingers to widen the gap
Using old products, you should clean the grooves from carbon deposits.
Removed products must be checked for suitability. To do this, they must be inserted into the cylinder and the gap measured using a feeler gauge. It should be in the range of 0.25 - 0.45 mm. A gap of up to 1 mm is allowed. If the value is greater, then the part must be urgently replaced. If the gap is larger, then the product needs to be sharpened using a needle file.
Before installing new products on VAZ 2109 pistons, they should be run in the grooves. If biting is detected, the part must be ground in using fine-grained sandpaper.

The table shows the maximum values of the gaps between the part being replaced and the groove walls.

Type of ring	Gap value, mm
Upper compression	0,04 — 0,075
Lower compression	0,03 — 0,065
Oil scraper	0,02 — 0,055

When installing, all parts should be thoroughly lubricated with oil.
Installation of products begins with the oil scraper. First, the expander is installed - a special spring with a lock. Then the product itself is put on her. The expander lock and the oil scraper ring gap must be opposite each other.
The lower compression ring has a groove and a tooth. When installed, they should be at the bottom of the part. On the upper surface there is usually an inscription “vas” or “tor”.
The upper compression ring is installed in the same way - with the lettering facing up.
The sequence of putting on the parts is as follows:

first, the lock is released so that the part can easily fit onto the piston;
then the lock itself starts;
the remaining part is installed.

After installation on the piston, all parts need to be oriented. The installation axis of the piston pin should be 45 degrees with the lock of the upper compression ring. The lock of the next product should be at an angle of 180 degrees with respect to the previous one. Thus, the angle between the oil control valve and the upper compression valve will be 90 degrees. Then the pistons and rings are pressed out with a special mandrel and inserted into the cylinders from which they were removed. Next, we perform the reverse assembly with our own hands.

After replacement, the VAZ 2109 piston rings must be run-in. In this case, you should not load the engine, drive on roads with long ascents, and change gears correctly.

Did you hand me the piston rings?

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Step-by-step replacement instructions

Piston repair work must be performed on an inspection ditch, lift or overpass.

What will you need?

To repair a VAZ 2109 engine with your own hands, you need the following tools:

a set of keys;
set of heads;
funnels;
extension cords;
torque wrench;
set of probes;
Set of gap gauges
mandrel for pressing products on the piston;
hammer;
needle file;
new repair kit.
Read also: New formula: LUKOIL LUX semi-synthetic 5W40 API SL CF
New consumables for piston VAZ 2109

When purchasing piston rings for the VAZ 2109, you should take into account the material of manufacture and their width. It is better to purchase original products to avoid fakes.

Stages

First of all, you need to dismantle the cylinder head with your own hands.
Then you need to remove the engine oil pan.
After rotating the crankshaft, install it so that the connecting rod mounting nuts extend as far as possible.
After unscrewing the fastening nuts, remove the connecting rod caps.
Using a hammer, tapping lightly, remove the piston with connecting rod from the cylinder.
Having opened the gap with your fingers, you need to remove all three products from the groove in turn and dismantle them from the piston. Together with the oil scraper, its expander is removed.
Use your fingers to widen the gap
Using old products, you should clean the grooves from carbon deposits.
Removed products must be checked for suitability. To do this, they must be inserted into the cylinder and the gap measured using a feeler gauge. It should be in the range of 0.25 - 0.45 mm. A gap of up to 1 mm is allowed. If the value is greater, then the part must be urgently replaced. If the gap is larger, then the product needs to be sharpened using a needle file.
Before installing new products on VAZ 2109 pistons, they should be run in the grooves. If biting is detected, the part must be ground in using fine-grained sandpaper.

The table shows the maximum values of the gaps between the part being replaced and the groove walls.

When installing, all parts should be thoroughly lubricated with oil.
Installation of products begins with the oil scraper. First, the expander is installed - a special spring with a lock. Then the product itself is put on her. The expander lock and the oil scraper ring gap must be opposite each other.
The lower compression ring has a groove and a tooth. When installed, they should be at the bottom of the part. On the upper surface there is usually an inscription “vas” or “tor”.
The upper compression ring is installed in the same way - with the lettering facing up.
The sequence of putting on the parts is as follows:

first, the lock is released so that the part can easily fit onto the piston;
then the lock itself starts;
the remaining part is installed.

After replacement, the VAZ 2109 piston rings must be run-in. In this case, you should not load the engine, drive on roads with long ascents, and change gears correctly.

Removing the pistons from the cylinders

To carry out the work, we go to an inspection hole or overpass and prepare a set of tools:

spanners;
torque wrench (determines the degree of tightening of the bolt);
mandrel for crimping rings;
a set of feeler gauges for determining the gap.

Replacing piston rings on a VAZ 2109 begins with disconnecting the negative terminal of the battery. To provide access to the crankshaft from the pit, remove the lower crankcase cover. There is a gasket at the junction, it will need to be replaced with a new one. Using a 10mm wrench, detach the oil receiver from the main shaft cover and the oil pump housing.

Next, we detach the exhaust pipe from the bracket under the bottom. Since the bracket is also attached to the body, unscrew the fastening bolts. We bend the ends of the locking plates of the nuts that secure the exhaust pipe and the intake manifold. We unscrew these nuts, as well as the nuts on the clamp, and remove the clamp. Next, the receiving pipe and the resonator pipe must be unfastened. Access is open from below; all that remains is to unscrew the nuts of the connecting rod screws and remove the connecting rod caps so that the connecting rod can be knocked out from below.

Device

Oil seals are a modern version of valve seals, which are equipped with a powerful steel sleeve inside and an expander spring. Springs are used to secure the edges of the caps and valve stems.

Actual size of the caps

Gaskets are made primarily of rubber, which becomes harder over time and wear occurs, so the element ceases to properly perform its functions. As a result, oil ends up inside the combustion chamber.

There is only one sign of wear on the valve stem seals - thick blue smoke begins to actively pour out of the exhaust pipe, plus oil consumption increases.

There is only one solution to this situation - replacement.

We replace piston rings for VAZ 2109

Has your “nine” increased gas and oil consumption? Is there dark smoke coming out of the exhaust pipe? These are symptoms of piston wear. In this case, the piston rings are replaced. Replacing VAZ 2109 rings is a simple process. Installation of new components can be done without even removing the engine. The main thing: disconnect the interfering parts.

Let's look at how to provide access to the piston group and replace the rings. When installing new parts, there are standards for permissible clearances that are important to comply with. After installation, be sure to run the car in. But first, let’s figure out what a piston group is and what are the signs of its wear.

Engine disassembly

Replacing the piston on a VAZ 2108 is carried out only after complete disassembly of the engine. Started:

remove the fuel pump;
remove the ignition distributor;
take out the generator;
remove the water pump;
remove the oil filter;
remove the breather cap along with the dipstick to check the oil;
remove the oil pressure sensors;
remove the crankshaft pulley;
remove the flywheel;

remove the tin plate;
unscrew the three engine cover bolts;
remove it;
take the key 10 and unscrew the cylinder head cover;
remove the gasket;
dismantle the chain drive;
remove the sprockets and chain;
remove the crankshaft gear;
unscrew the nuts of the gas camshaft housing;

remove the cylinder heads;
remove the pan;
remove the rear oil seal housing;
remove the oil pump;
remove the drive shaft along with the oil pump gear;
remove the oil separator;
dismantle the crank mechanism;

remove the cover;
remove the connecting rods with the piston;
remove the main caps;
remove the crankshaft;
remove the spacer rings;
remove old liners.

How to replace rings yourself

Attention: Replacement of piston rings on a VAZ 2108 is carried out after installing new crankshaft liners. As mentioned above, we remove the pistons and connecting rods. On the lower heads and connecting rod caps we see steel-aluminum type liners. They are threaded in such a way that they do not turn. They are kept from this by locks that fit into the slots of the beds.

So, replacing piston rings on a VAZ 2108 is carried out as follows:

take the connecting rod and clamp it in a vice;
after decompression, remove the old rings (upper and lower compression).

It should be remembered that when installing new rings, the top mark should be directed towards the bottom of the piston. The mark is often the name of a company or simply a car model, applied to the ring by the manufacturer. It also happens that instead of an inscription, an edge or chamfer is used. So, in this case, you need to install the ring with this chamfer down. Replacement of VAZ 2108 pistons continues:

the old oil scraper ring is removed;
The expander is also removed.

Attention: Replacing pistons on a VAZ 2108 involves knocking out the pin located in the piston. To do this, place the piston on some wooden support and knock out the pin with a hammer.

Go ahead:

we collect everything in the reverse order;
We take a new piston, which we select by class (the class is marked with a letter, and the piston category with a number).

Now you need to be able to correctly adjust the gap between the cylinder and the piston.

For completely new parts, the gap should be 0.05-0.07 mm. If any of the parts are worn out, the gap may be no more than 0.15 m.
In addition, replacing the piston on a VAZ 2108 should be carried out so that the finger enters the hole with the force of only the thumb. Also, it should not fall out of the piston if it is in a vertical position.

Go ahead:

install rings;
take a feeler gauge and check the gap (or rather, it is advisable to check the gap with a set of special feeler gauges).

Attention: The ring gap should be between 0.25 and 0.40 mm. If the gap is larger, the ring must be replaced. If the gap is smaller, we arm ourselves with a needle file. We carry out the following operation: we grind off the ends of the ring, but only very carefully.

This video shows everything thoroughly. It is recommended to watch it before starting the operation yourself.

install the rings into the piston grooves;
We begin the orientation process.

This operation consists of correctly positioning the rings at an angle to each other. The photo below clearly shows what angle they should have:

So, you need to install them yourself, as required by the instructions:

the upper compression ring is oriented at an angle of 45 degrees (the angle should be directed towards the piston pin axis);
the lower compression ring should be rotated relative to the upper one in the complete opposite direction;
the oil scraper ring lock is adjusted to 90 degrees relative to the other rings (as for the joint of the expander, it should be located on the lock side of the ring itself);
take the upper head of the connecting rod and heat it to 240 degrees (to do this, we clamp it in a vice and process it with a special tool);
pre-cool the finger in ice water;
the piston is put on the connecting rod;
using a mandrel, the finger is pressed into the hole;

Mistakes made during installation

Oddly enough, even professionals often admit them. These include:

installing new rings on a worn engine;
installation of piston rings on one side, which leads to gas breakthrough.

It is worth noting that the numbers and letters on the connecting rod and cover must be located on the same side. The special mark “P”, which is located on the piston, should be directed towards the front of the cylinder block. This step-by-step instruction will help you master complex techniques for installing new piston rings on a VAZ 2108. Usually the price for such services from professionals is very high, since the process involves dismantling and disassembling the engine and a lot of complex steps. But armed with the necessary knowledge and a good tool, even motorists just starting repairs on their own can safely get to work.

Signs of piston wear

On average, a piston replacement on a VAZ 2109 is required every 150,000 km. The car owner should pay attention to warning signs that indicate the need to change the rings.

The car began to require more fuel.
Compression measurements showed a value of less than 10 atmospheres.
There is less engine oil.
Replacing oil seals does not help eliminate oil leaks.

The VAZ 2109 piston group is a set consisting of a piston, piston rings mounted on it, a piston pin and its fasteners. There are three grooves on the surface of the piston for rings.

Two compression rings are responsible for the tightness of the space above the piston. They maintain normal compression and also prevent oil from entering the combustion chamber.

The oil scraper is responsible for removing excess oil from the cylinder walls, thereby reducing fuel consumption. Only a film a few microns thick is left inside the cylinder liner to lower the piston. Well, the pin, which is inserted transversely inside the piston cavity, attaches the connecting rod to the piston.