How to find out the ring size of a VAZ 2109. Dimensions and markings of the connecting rod and piston group

Yury (Yeriot)  forged, 86, 4, spliced ​​and polished, the volume is 1.8 liters, not an injector, it has the same engine, the compression is crazy

Viktor (Mhina)  THANK YOU SO MUCH

Kirill (Fearchar)  A 82.8 forged available

Yury (Yeriot)  of course, but it’s better to install from foreign cars, in my opinion you can install from a boomer

Artur (Walentyna)  Yuri, how can I drill the 9th block to 86.4?

Artur (Walentyna)  maybe 82.4

Yury (Yeriot)  no way, you can sleeve it, but the walls will crumble between the pistons, ..... such pistons are in block 10, and the head is 12

Yury (Yeriot)  to be honest guys, you don’t need such pistons........if you want to make them for racing......then it’s easier and better to find an engine from a foreign car, or buy a turbocharged one from Skylica ..........and so it’s all tripe.........and so that just the piston one lasts longer, it’s better, of course, to install forged ones, they wear out less

Rinat (Kosha)  what is the asking price?

Yury (Yeriot)  the price varies, depends on the power, who needs it I can send you a link to one guy who does this

Sergey (Tsubasa)  you yourself tried setting the engine to 09 from Skylica xxhahaha

Sergey (Tsubasa)  and no amount of pistons can make the volume from 1.5 to 1.8! There simply isn’t enough meat on the engine for such a procedure!!! sometimes when remaking an engine they cannot bore it even to 1.6 because corrosion has begun to destroy the inside of the liner (from antifreeze, antifreeze) volumes above 1.6 are achieved by changing the crank mechanism (crankshaft) as well as the piston group (lowered) because as soon as you change the knee , the pistons rise (from the block) and the combustion chamber changes accordingly, the compression ratio (do not confuse it with compression) and since the degree changes, it is logical that the type of fuel will change (from 92, 95 to 110au) and to return it you will have to either measure, sharpen and adjust (there is another option to order pistons for a certain degree) or install two gaskets under the cylinder head! But as for which pistons and what size, then just put the ones you want, not how
will not work! The easiest way is to turn to motor mechanics, or if you do it yourself, then read the literature! and in general, sometimes you can exchange factory pistons for factory pistons without measuring engine wear (like buying a pig in a poke)

Misha (Felton)  No way. THIS IS NOT POSSIBLE!!!

Ivan (Zephyrus)  I have an injector on the nine.

the third time the fourth piston burns out, what is the reason

Dmitry (Zubaidah)  Your brain is soaring on the 4th injector

Vadim (Okpara)  From an old Volva 8 valve. without boring just grind off the head and reshape the brains 145 hp campresia 16.5

Some sizes Replacing the piston with a larger size is accompanied by a groove...

Who installed VAZ piston rings in the Urals, what was the result? | Topic author: Peter

Who installed VAZ piston rings in the Urals, what was the result?

Sasha

Diana
I drove a Mahle 79mm (VAZ classic), now I took a Kolbenschmidt, it can’t even be compared with the Ural rings, the service life is from 50,000 km. Just to install them, you need Avtotekhnologiya pistons with a diameter of 79 mm

Kuzminov Dmitry

You will forget what overheating, jamming and oil consumption are forever.

put it from the Dnieper

Kuzminov Dmitry

The diameter of the original pistons is 78mm, the VAZ ones are 79mm, of course change them

Ilya Frolov

And sharpen the cylinders.

replied to friend

Ilya Frolov

It’s not easy to remake the Dnieper parshnya and the compression ratio is higher, waking up 40 lashes and more

Ilya Frolov

replied to friend

For me, it’s easier to deliver “Autotechnology” to the Urals, spherical ones.
And a friend was interested in VAZ rings, so for this he would need to change the pistons and sharpen the cylinders for these pistons, and only then install the rings.

just a hedgehog

If I'm not mistaken, in a car the piston pin has a larger diameter. Accordingly, you need to sharpen the entire cylinder head and the connecting rod bushing so that the pin fits

Increase compression ratio
to such limits using standard
pistons from Ural, impossible.
Therefore, taking into account the data in Table 1
pick up pistons from the engine
MT-8 (K-650 "Dnepr"
with spherical
head. At the same time, for
prevent the piston from colliding with
cylinder head, should be in place
chamfer the step formed
transition of a spherical chamber
combustion into the mating plane of the head
cylinder, ensuring the gap is not
less than 1-1.5 mm. To prevent the piston skirt
touched the crank pins, on
a special sample is milled with it, and on
piston crown change sockets
for valves, since camber angles
the latter for the MT-8 and M-63 engines
are different (Fig. 1). To check if
Do the valves touch the bottom?
piston, stripes are applied to it
plasticine 3-4 mm thick, then
completely assemble the cylinder head and
turn the crankshaft. By
imprints on plasticine judge the presence and
the size of the gap between
valve and piston. He must not be
less than 2-3 mm. Before installing on
the engine pistons are weighed, and
the difference in mass should not exceed
2 years
When forcing

Kuzminov Dmitry

IMHO, it’s time to throw out the original piston group a long time ago. This is a long-lived past. Especially if there are forged pistons from Autotechnology. Although, if there are those who want to tinker with the engine every year, changing the rings, and adding oil before each trip, let them do it. From the very beginning there was a question about installing VAZ piston rings; they can be installed by changing the pistons and boring the cylinders. The pistons that I wrote about above fit standard Ural piston pins.

Kuzminov Dmitry

I wrote above that there are enough of them for at least 50,000. Native rings will not last even half of this resource.

Andrey Shafrygin

replied to friend

Kuzminov Dmitry

Bro, where can I buy them and piston?

Kuzminov Dmitry

Type in Google "Autotechnology" in Moscow there are

Andrey Shafrygin

replied to friend

Kuzminov Dmitry

got the pistons current but no rings

Pistons - logbook Lada 2109 Ver.One | DRIVE2

Lada 21093i owner's story - spare parts. ... Lada 2109 Ver. ... Avtramat pistons for grants (sizes + 0.5mm and + 1.0mm). .... the caps come in either Reinz or Corteco - pale. and people say a lot of things, just like that.

Engine piston VAZ 2110 (82.0; 82.4 and 82.8) A, C and E with...

Installed on cars of the VAZ 2108, VAZ 2109-099, VAZ 2110 - 2111, VAZ 2112, Lada family... Repair pistons come in two sizes.

Plumes of bluish smoke coming from the exhaust pipe cause a lot of trouble for the driver. Often in this case it is necessary to repair the engine.
This article suggests how to replace the entire piston on a VAZ 2109.

Features of the piston group of the VAZ 2109 car

Usually, after 150 thousand kilometers, visible wear occurs in the pistons group.
It can be determined by some signs:

• Promotion.
• Reduction, less than 10 kgf/cm2, of engine compression.
• Increased oil consumption. 1000 kilometers are enough to reduce the oil level from maximum to minimum.
• Change in color of exhaust gases to a bluish tint.
• Oil consumption decreases slightly after replacing the oil seals. This suggests that diagnostics of the piston system and, if necessary, replacement of worn parts are necessary. The permissible wear of liners and pistons should not be more than 0.15 millimeters; in this case, you can only get by by replacing the piston rings.

You can replace the piston rings on a VAZ 2109 car without removing the engine from the car.

Tip: After installing other piston rings, the gasket located between the head and the cylinder block needs to be replaced. All other parts that fail are replaced with new ones during the assembly process.

How to disassemble the piston of a VAZ 2109 car

If the piston engine on a VAZ 2109 car fails, it must be replaced in an inspection pit or overpass. To work with your own hands you need: a set of keys, a special torque wrench, a mandrel with which the rings are crimped on the piston.
Replacing a piston VAZ 2109, the video shows in detail the procedure for performing the work.
It is as follows:

• The battery is removed to clean the air, the carburetor, the ignition distribution sensor, and the ventilation hose.
• The lubricating fluid is drained from the engine sump.
• The sensor indicating the temperature of the cooling fluid is disconnected, the plug is unscrewed from the engine block and the antifreeze is drained.
• The “stove” is disconnected from the GB.
• The hose from the vacuum brake booster is removed from the intake manifold.
• The hoses are disconnected from the front pipes on the GB.
• The bolt holding the exhaust pipe to remove exhaust gases from the gearbox is unscrewed from the clamp, and the exhaust pipe is disconnected from the resonator pipe.
• The receiving pipe going to the manifold is disconnected from the engine.
• The upper and lower nuts securing the air intake are unscrewed. The latter also holds the front part of the shield, which protects the starter from the hot exhaust manifold.

Tip: You can simplify the removal and installation of the starter shield by removing the lower eye to secure it.

• The fasteners of the protective casing are unscrewed, it covers the camshaft drive belt.
• The belt tension is loosened. To do this, it is removed from the camshaft sprocket.
• The asterisk is removed.
• The back cover covering the belt is detached.
• The screws holding the head on are unscrewed.
• Having unscrewed all the bolts securing the cylinder head, the latter, after rocking, comes off from the cylinder head and is removed along with the gasket.
• The cover mounted on the clutch housing is released from the fastening and removed.
• The screws are unscrewed and the engine oil pan is removed.
• The oil receiver is pulled out from the pump housing to pump oil.
• The nuts of the connecting rod screws are unscrewed and the covers on the connecting rods are removed.
• With a light tap with the handle of a hammer, the piston with connecting rod and upper liner is pulled up.

• In this way, all the engine pistons are pulled out.
• The connecting rod is clamped in a vice; the jaws on the vice are made of soft metal.
• Without exerting much effort, carefully use your fingers to open the locks, and remove the compression rings, two in number, from the piston one by one.
• One oil scraper ring is removed.
• The oil scraper ring expander is pulled out.

How to change piston rings

Using old piston rings, the piston grooves are cleaned of carbon deposits.
Before replacing the piston rings on a VAZ 2109, they need to be run in the piston grooves. If the rings bite, the parts must be ground in using fine-grain sandpaper.
For convenience, it is placed on glass.

Tip: Pay special attention to the second compression ring. It is quite rigid, which means it is very fragile and can easily be broken.

You need to replace the VAZ 2109 piston rings after measuring the gap between the new piston ring and the groove wall with feeler gauges. The photo shows how this is done.
There is a special instruction according to which the permissible gaps for rings in the piston grooves must be within the values ​​​​specified in the table.

So:

• If the maximum permissible gap is exceeded, you will need to replace the piston rings on the VAZ 2109 yourself.
• The inscriptions “TOR” or “VAZ” should be at the top when installing the oil scraper and upper compression rings.
• The lower compression ring is oriented with the groove down.
• The rings are put on the piston in the following sequence:

1. the ring lock is moved apart to such an extent that the ring can be easily placed on the piston;
2. the ring lock is engaged on the piston;
3. The rear part of the part is installed.

Installation of new rings on the piston begins from the oil scraper ring expander. After installation, the expander lock ring must be rotated 180 degrees relative to the ring lock.
After installing all the rings on the piston, they must be oriented so that the angle between the compression top ring lock and the piston pin installation axis is 45 degrees. The lock on the lower compression ring rotates 180 degrees, and the angle between the lock on the oil scraper ring and the lock on the upper compression ring should be 90 degrees.
So:

• If the ring installation technology is violated, the lubricating fluid can penetrate into the cylinder, which will lead to the formation of carbon deposits on the walls of the combustion chamber, smoke will come out of the muffler, and oil consumption will increase significantly. Rings can only be placed on the piston with special pliers or using a special device.
• When installing the unit, you need to lubricate the cylinder bore, rings and piston with high-quality engine oil.
• A mandrel is put on the piston, the rings are crimped with it, when self-installing the rings on the mandrel, you need to lightly tap the handle of a hammer.
• Inserts are installed in the bottom cover on the connecting rod. Before this, the beds in the connecting rod and in the cover for the liners are wiped dry.
• The crankshaft connecting rod journal and the surface inside the bearings are lubricated with high-quality engine oil.
• There is an arrow on the bottom of the piston, orienting it so that its direction is towards the crankshaft pulley, the piston is placed in the block sleeve.
• The piston must be recessed into the cylinder. The mandrel must be pressed against the block, and the bottom of the piston must be tapped with the handle of a hammer. At the same time, it is necessary to monitor the movement of the connecting rod towards the crankshaft journal.
• The cover is installed on the connecting rod, the nuts must be tightened with a torque of approximately 5 kgf/m.

How to break in a car after installing new piston rings:

• The car cannot be fully loaded.
• Change gears in a timely manner.
• Roads should not have long climbs.
• Constantly check the oil level.
• You can’t sit in traffic jams for a long time and accelerate sharply.
• The lubricant needs to be changed after 1000 kilometers.

How to repair a piston VAZ 2109

If wear in the cylinders exceeds 0.15 millimeters, the cylinders need to be bored and the pistons and rings replaced to the following repair size:

• Replacement of a VAZ 2109 piston must be carried out taking into account the compliance of each piston class with a new piston ring.
• When choosing a ring, you need to pay attention to its markings:

1. if it is absent on the parts, then the product has nominal dimensions;
2. “40” - an increase of 0.4 millimeters in the diameter of the repair ring is marked;
3. “80” - corresponds to the marking of an increase in size by 0.8 millimeters.

Piston repairs in a BC are performed as follows:

• Cylinder wear is checked. Using a bore gauge, the diameter of the cylinder is measured in two directions—longitudinal and transverse—in four zones.

• In the area of ​​the first belt there is practically no wear on the cylinder. Therefore, the amount of wear in the remaining belts of the part can be determined by the difference in diameters between this cylinder belt and the others.

• If the amount of wear is more than 0.15 millimeters, the cylinders are bored to the closest repair size. It should be taken into account that the final operation for processing the cylinder is honing.
  Therefore, it is necessary to leave an allowance for processing of a diameter of 0.03 millimeters.
• After the final operation, the repair size of the piston and the diameter of the cylinder differed in the range of 0.025 - 0.045 millimeters.
• A new piston is installed.

Tip: The caps on the connecting rod are not interchangeable. The connecting rod cover and the part indicate the number of the cylinder where the connecting rod can be installed. When replacing a VAZ 2109 piston, the numbers on the connecting rod should be located on one side.

• In the same way, all remaining pistons on the VAZ 2109 are replaced.
• The engine is assembled in the reverse order of disassembly after the last piston is installed.

The replacement of VAZ 2109 pistons is well shown in the video.

How to properly break in an engine after replacing a piston

Proper running-in of the car is of great importance after the entire piston engine on the VAZ 2109 has been replaced. This must be treated very carefully, as well as repairs.
Particular attention should be paid to those units in which the parts are connected to each other by friction, and the efficiency depends on the optimal clearances with which they should be adjacent to each other.
So:

• The speed of the car, after installing new pistons, should not exceed more than 60 kilometers in one hour per 1000 kilometers. This is necessary for grinding in parts that rub against each other.
• The main purpose of running in is to smooth out all micro-irregularities. This occurs by friction between the parts until their complete fit is ensured.
  Increased heating of engine parts occurs when there is high friction during “grinding in.”
• This indicates that the engine should operate with gentle, minimal loads.

Compliance with all these rules, after replacing the piston on a VAZ 2109, will ensure the use of the car in good condition for a long time.

Dear customers, in order to avoid errors when sending a set of pistons with pins, please indicate the model and year of manufacture of your car in the “Comment” line,piston outer diameter and class.

The clouds of bluish smoke escaping from the exhaust pipe give the driver many unpleasant thoughts. This most often indicates an unpleasant, but inevitable moment in the life of a car - engine repair.

When the car has traveled approximately 150 thousand kilometers, noticeable wear of the piston group occurs.

The connecting rod and piston group - connecting rod, piston with rings, connecting rod or main bearings - is the most important component in the engine. If the technical condition of these elements in the engine is inappropriate, the following is observed: reduced compression, the possibility of jamming.

Piston – cast aluminum. During manufacturing, the weight of the pistons is strictly maintained.

Piston pin – steel hollow, floating type, i.e. rotates freely in the piston bosses and connecting rod bushing. The pin is secured in the piston bore by two spring retaining rings.

Piston ringsmade of cast iron. The upper compression ring has a chrome-plated barrel-shaped outer surface. The lower compression ring is scraper type. The oil scraper ring has chrome-plated working edges and an expansion coil spring.

connecting rod – steel, forged. The connecting rod is processed together with the cover and therefore they are individually non-interchangeable. To avoid mixing up the caps and connecting rods during assembly, they are marked with the number of the cylinder in which they are installed. A steel-bronze bushing is pressed into the upper head of the connecting rod. Based on the diameter of the hole in this bushing, the connecting rods are divided into three classes every 0.004 mm (the same as the pistons). The class 5 number is stamped on the connecting rod cover.

1 – arrow for orienting the piston in the cylinder; 2 – repair size; 3 – piston class; 4 – piston pin hole class; 5 – connecting rod classes by weight and by hole in the upper head; 6 – cylinder number.

On parts of 2110 engines, a connecting rod and piston group from 21083 engines can be installed.

According to the outer diameter, pistons are divided into five classes (A, B, C, D, E) every 0.01 mm (measured in a plane perpendicular to the piston pin, at a distance of 55 mm from the piston bottom).

The plant supplies class A, C and E pistons for car spare parts, which is quite sufficient for selection.

The main thing when selecting a piston is to ensure the required installation gap between the piston and the cylinder, which is determined by measuring the cylinder and piston.

When selecting new pistons for a worn cylinder, the gap between the piston skirt and the liner mirror should be checked in the lower, least worn part of the cylinder. The gap in this part of the cylinder should not be allowed to decrease to less than 0.02 mm.

The depth of the recesses for the valves, on the bottom of the piston 2110, eliminates the possibility of the valves coming into contact with the piston if the timing belt breaks.

In the design of the VAZ 2110 piston and in the design of all subsequent models, a free fit of the piston pin is used. The clearance in the hole in the connecting rod head and in the holes in the piston ensures free rotation of the pin. The pin is secured in the axial direction with locking rings. For this purpose, the piston, in the pin holes, has installation grooves for retaining rings. On the outside of the piston pin holes, in the upper part, there are small recesses that make it easier to install and remove the circlips. In addition, they facilitate the access of oil to the contact area.

This design simplifies the assembly process and ensures uniform wear of rubbing surfaces, increasing the service life of parts. The piston diameter classes and piston pin hole classes adopted for model 21083 correspond to the classes of models 2110, 2112, 21124.

In terms of geometric parameters, there are no differences between the pistons of the VAZ 21083 and VAZ 2110 models.

Repair pistons come in two sizes. Pistons of nominal size are not marked. Pistons of the first repair size are manufactured with a diameter increased by 0.4 mm and are marked with a “triangle” symbol. Pistons of the second repair size have a diameter increased by 0.8 mm and are marked with a “square” symbol.

All pistons on the engine must be of the same mass group. Pistons of the nominal group are designated by the symbol “G”. Pistons with increased and decreased mass by 5 g are designated “+” and “-”, respectively.

The piston pin is designed to articulate the piston with the upper head of the connecting rod. It is made hollow (in the form of a thick-walled tube). In order for the fingers to work reliably when transmitting large forces, they are made of steel (alloy or carbon).

Based on the outer diameter of the piston pins, they are divided into three classes at 0.004 mm intervals. The class of the piston pin is marked with paint on its end. Based on the diameter of the hole for the piston pin, pistons are also divided into three classes every 0.004 mm.

The piston and its corresponding cylinder must belong to the same class, just as the piston and piston pin must belong to the same category.

It is advisable to select a set of pistons with a large skirt diameter to reduce the gap between the piston and the cylinder bore.

Pistons are replaced most often due to wear on the upper piston ring groove and less often due to wear on the piston skirt. It is advisable to replace pistons at the same time as the piston rings.

Signs of a malfunction of the connecting rod and piston group:

Gasoline consumption has increased;

Engine compression dropped below 10 kgf/cm2;

Oil consumption has increased. Over 1000 kilometers, the oil level decreased from the maximum to the minimum;

The color of the exhaust gases has changed to a bluish tint.

Other article numbers of the product and its analogues in catalogues: 21100100401500.

VAZ 2108, VAZ 2109-099, VAZ 2110 - 2111, VAZ 2112, VAZ 1117 - 1119, VAZ 2113-2115.

Any breakdown – this is not the end of the world, but a completely solvable problem!

With an online store AvtoAzbukarepair costs will be minimal.

Just COMPARE and BE SURE!!!

The main dimensions of the connecting rod and piston group are given on rice. 2–34. A connecting rod and piston group from engines 21083 can be installed on parts of 2110 engines. Its repair is described in the Repair Manual for VAZ-2108, VAZ-2109 vehicles.

Piston– cast aluminum. During manufacturing, the weight of the pistons is strictly maintained. Therefore, when assembling the engine, it is not necessary to select pistons of the same weight group.

According to the outer diameter, the pistons are divided into five classes (A, B, C, D, E) every 0.01 mm. The outer surface of the piston has a complex shape. Therefore, it is necessary to measure the piston diameter only in a plane perpendicular to the piston pin, at a distance of 55 mm from the piston bottom.

Based on the diameter of the hole for the piston pin, pistons are divided into three classes (1, 2, 3) every 0.004 mm. The classes of piston diameters and piston pin holes are stamped on the piston crown ( rice. 2–35 ).

Repair size pistons are manufactured with an outer diameter increased by 0.4 and 0.8 mm. An increase of 0.4 mm corresponds to a marking in the form of a triangle, and an increase of 0.8 mm corresponds to a marking in the form of a square.

The arrow on the piston crown shows how to properly orient the piston when installing it into the cylinder. It should be directed towards the camshaft drive.

Piston pin– steel hollow, floating type, i.e. rotates freely in the piston bosses and connecting rod bushing. The pin is secured in the piston bore by two spring retaining rings.

According to the outer diameter, the fingers are divided into three classes every 0.004 mm. The class is marked with paint on the end of the finger: a blue mark is the first class, a green mark is the second class, and a red mark is the third class.

Piston rings made of cast iron. The upper compression ring has a chrome-plated barrel-shaped outer surface. The lower compression ring is scraper type. The oil scraper ring has chrome-plated working edges and an expansion coil spring.

Repair size rings are marked digitally “40” or “80”, which corresponds to an increase in the outer diameter by 0.4 or 0.8 mm.

connecting rod– steel, forged. The connecting rod is processed together with the cover and therefore they are individually non-interchangeable. To avoid mixing up the caps and connecting rods during assembly, they are marked with the number of the cylinder in which they are installed (see Fig. rice. 2–35 ).

A steel-bronze bushing is pressed into the upper head of the connecting rod. Based on the diameter of the hole in this bushing, the connecting rods are divided into three classes every 0.004 mm (the same as the pistons). The class 5 number is stamped on the connecting rod cover.

Based on the weight of the upper and lower heads, connecting rods are divided into classes (Table 2–1), marked either with a letter or with paint on the connecting rod cover. Connecting rods of the same weight class must be installed on the engine.

Table 2–1

Classes of connecting rods based on the weight of the upper and lower heads

The weight of the connecting rods can be adjusted by removing metal from the bosses on the upper head and on the cover to a minimum size of 33 and 32 mm ( rice. 2–36). After removing the metal from the connecting rod cap, it is necessary to mark it with the classes of the connecting rod by the hole for the piston pin and by weight.

Selection of piston to cylinder

The calculated gap between the piston and cylinder (for new parts) is 0.025–0.045 mm. It is determined by measuring the parts and is ensured by installing pistons of the same class as the cylinders. The maximum permissible gap (if parts are worn) is 0.15 mm.

If a used engine has a gap exceeding 0.15 mm, then it is necessary to re-select the pistons to the cylinders so that the gap is as close as possible to the calculated one.

Spare parts include pistons of classes A, C, E. These classes are sufficient to select a piston for any cylinder during engine repair, since pistons and cylinders are divided into classes with a slight overlap of sizes. For example, a class C piston may be suitable for class B and D cylinders.

Disassembly and assembly

Disassembly. Remove the piston pin retaining rings from the piston, remove the pin and disconnect the connecting rod from the piston. Remove the piston rings.

The connecting rod bolts are pressed into the connecting rod. Therefore, when disassembling the engine and connecting rod-piston group, it is not allowed to press the bolts out of the connecting rods.

If some parts of the connecting rod and piston group are not damaged and have little wear, then they can be used again. Therefore, when disassembling, mark them in order to later assemble a group with the same parts and install them in the same engine cylinder.

Assembly. Before assembly, fit the pin to the piston and connecting rod. For new parts, the class of pin holes in the connecting rod and piston must be identical to the class of the pin. For used parts, for proper mating it is necessary that the piston pin, lubricated with engine oil, enters the piston hole by simply pressing the thumb ( rice. 2–37) and did not fall out of it if you hold the piston as shown in rice. 2–38 .

Replace the finger that falls out with another one of the next category. If a third category pin was inserted into the piston, replace the piston, pin and connecting rod.

Assembly of the connecting rod and piston group is carried out in the reverse order of disassembly. Before assembly, lubricate the piston pin with engine oil. Install the piston rings in the following order.

Lubricate the piston grooves and piston rings with engine oil. Orient the piston rings so that the upper compression ring lock is at an angle of approximately 45° to the piston pin axis, the lower compression ring lock is at an angle of approximately 180° to the upper compression ring lock axis, and the oil ring lock is at an angle of approximately 90° to the upper compression ring lock axis. rings.

Install the lower compression ring with the groove facing down (see Fig. rice. 2–34). If the ring is marked “TOP” or “TOP”, then install the ring with the mark facing up (towards the piston bottom).

11.9

For the convenience of selecting pistons for cylinders, cylinders and pistons, depending on the diameter, are divided into five size groups: A, B, C, D, E.

Pistons of nominal sizes of three classes are supplied as spare parts: A, C, E and two repair sizes. The first repair size is increased by 0.4 mm, the second - by 0.8 mm. Based on weight, pistons are divided into three groups: normal, increased by 5 g and decreased by 5 g. Pistons of the same group must be installed on the engine. For repair size pistons, repair size rings increased by 0.4 mm and 0.8 mm are supplied as spare parts. The number “40” is stamped on the rings of the first repair size, and “80” on the second.

To select pistons for cylinders, calculate the gap between them. The clearance is defined as the difference between the measured diameters of the piston and cylinder. The nominal gap is 0.025-0.045 mm, the maximum permissible is 0.15 mm. If the gap does not exceed 0.15 mm, you can select pistons from subsequent classes so that the gap is as close as possible to the nominal one. If the gap exceeds 0.15 mm, bore the cylinders to the next repair size and install pistons of the corresponding repair size.

Note 1

Note 2

The piston pins are divided by diameter into three classes (1st, 2nd, 3rd) every 0.004 mm. The class of the finger is marked on its end with paint.

vaz2109manual.narod.ru

Piston with connecting rod. Disassembly, troubleshooting and assembly

1. Repair manuals
2. Repair manual for VAZ 21099 (Lada) 1990-2008.
3. Piston with connecting rod. Disassembly, troubleshooting and assembly

Nominal sizes of cylinders and pistons

EXECUTION ORDER

Note 1

Note 2

Classes of piston pins and pistons

10. Inspect the connecting rods with caps. Replace bent connecting rods. Note

↓ Comments ↓

1. Description of the car 1.0 Description of the car 1.1 Appearance 1.2 Engine compartment 1.3 General data 1.4 Technical characteristics 1.5 Passport data

2. Vehicle operation 2.0 Vehicle operation 2.1 Safety rules and operating recommendations 2.2 Side doors 2.3 Trunk lid 2.4 Opening and closing the hood 2.5 Luggage compartment 2.6 Adjusting the front seats 2.7 Controls 2.8 Interior ventilation and heating 2.9 Eliminating fogging or frosting of windows

3. Vehicle Maintenance 3.0 Vehicle Maintenance 3.1 Checking the tightness of the engine and gearbox seals 3.2 Checking the tightness of the cooling system 3.3 Checking the tightness of the fuel system 3.4 Replacing the coolant 3.5 Replacing the oil filter and engine oil 3.6 Replacing the air filter element 3.7 Checking and adjusting the belt generator drive 3.8 Replacing the generator drive belt 3.9 Cleaning and washing parts of the crankcase ventilation system 3.33. Lamp replacement

4. Car care 4.0 Car care 4.1 Car washing 4.2 Caring for and restoring body paint 4.3 Body lubrication 4.4 Cleaning drain holes 4.5. Car storage 4.6 Preparing for winter use 4.7 Tips for starting the engine in severe frost 4.8 What is useful to buy for winter 4.9 Tips for winter use of the car

5. Malfunctions along the way 5.0 Malfunctions along the way 5.1. Engine 5.2. Checking electrical equipment 5.3 Extraneous knocking noises appeared 5.4 Vibration and shock on the steering wheel 5.5. Brake problems 5.6 Wheel puncture

6. Chassis 6.0 Chassis 6.1. Front suspension 6.2. Rear suspension

7. Steering 7.0 Steering 7.1 Steering wheel 7.2 Steering column 7.3 Steering mechanism 7.4 Replacing steering rods

8. Brake system 8.0 Brake system 8.1 Front wheel brake 8.2 Rear wheel brake 8.3 Wheel cylinder 8.4 Brake drive

9. Electrical equipment 9.0 Electrical equipment 9.1 Relay and fuse box 9.2. Generator 9.3. Starter 9.4. Lighting and light signaling 9.5. Heater 9.6. Windshield wipers 9.7 Sound signal 9.8. Ignition system 9.9 Instrument panel (high)

Body 10.0 Body 10.1 Replacing the front buffer 10.2 Replacing the rear buffer 10.3 Replacing the radiator trim 10.4 Replacing the front fender 10.5 Removing and installing the hood 10.6 Adjusting the hood 10.7 Adjusting the hood lock 10.8 Front door 10.9 Rear door

11. Engine and its systems 11.0 Engine and its systems 11.1 Removing and installing the engine 11.2 Adjusting the clearances in the valve drive 11.3. Power supply system 11.4. Lubrication system 11.5. Cooling system 11.6. Exhaust system 11.7 Complete disassembly of the engine 11.8 Cylinder block. Inspection, troubleshooting and repair 11.9 Piston with connecting rod. Disassembly, troubleshooting and assembly 11.10. Cylinder head 11.15. Carburetor adjustment

12. Transmission 12.0 Transmission 12.1 Gearbox and differential. Main components and parts 12.2 Removing the gearbox 12.3 Installing the gearbox 12.4 Adjusting the clutch drive 12.5 Disassembling the gearbox 12.6 Inspecting and troubleshooting gearbox parts 12.7. Secondary shaft of the gearbox 12.8 Primary shaft of the gearbox 12.9. Differential 12.16. Clutch drive 12.17. Front wheel drive

13. Appendices 13.0 Appendices 13.1 Appendix 1. Basic data for adjustments and monitoring 13.2 Appendix 2. Fuels and lubricants and operating fluids 13.3 Appendix 3. Tightening torques for threaded connections 13.4 Appendix 4. Service book 13.5 Appendix 5. Vehicle electrical diagram

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VAZ 2109 1987+: Piston with connecting rod. Disassembly, troubleshooting and assembly of VAZ 2109 Lada Samara

For the convenience of selecting pistons for cylinders, cylinders and pistons, depending on the diameter, are divided into five size groups: A, B, C, D, E.

Pistons of nominal sizes of three classes are supplied as spare parts: A, C, E and two repair sizes. The first repair size is increased by 0.4 mm, the second – by 0.8 mm. By weight, the pistons are divided into three groups: normal, increased by 5 g and reduced by 5 g. Pistons of the same group must be installed on the engine. For pistons of repair sizes Rings of repair sizes, increased by 0.4 mm and 0.8 mm, are supplied as spare parts. The number “40” is stamped on the rings of the first repair size, and “80” on the second.

Nominal sizes of cylinders and pistons

To select pistons for cylinders, calculate the gap between them. The clearance is defined as the difference between the measured diameters of the piston and cylinder. The nominal gap is 0.025-0.045 mm, the maximum permissible is 0.15 mm. If the gap does not exceed 0.15 mm, you can select pistons from subsequent classes so that the gap is as close as possible to the nominal one. If the gap exceeds 0.15 mm, bore the cylinders to the next repair size and install pistons of the corresponding repair size.

Note 1

Note 2

The piston pins are divided by diameter into three classes (1st, 2nd, 3rd) every 0.004 mm. The class of the finger is marked on its end with paint.

Classes of piston pins and pistons

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VAZ 2109 | Selection of piston to cylinder liner

The piston and the corresponding sleeve must belong to the same size group (have the same letter index).

According to the outer diameter, the pistons are divided into five size groups (A, B, C, D, D) every 0.01 mm.

Letter markings are applied to the surface of the piston crown.

The main thing when selecting a piston is to ensure the required installation gap between the piston and the liner.

When selecting new pistons for a worn cylinder, the gap between the piston skirt and the liner mirror should be checked in the lower, least worn part of the cylinder. The gap in this part of the cylinder should not be allowed to decrease to less than 0.02 mm. In terms of weight, the pistons of one engine should not differ from each other by more than 3 g. The pistons are sorted at the manufacturer by weight into four weight groups, the markings of which (1, 2, 3, 4) are applied to the bottom of the piston. All pistons installed on one engine must belong to the same weight group.

After the selection of pistons to liners is completed, you should select piston pins to the pistons and bushings of the small connecting rod heads.

The fit of the piston pin in the piston bosses can range from 0.0025 mm of interference to 0.0025 mm of clearance. The gap between the piston pin and the hole in the connecting rod head bushing should be in the range of 0.0045–0.0095 mm.

Warning

To facilitate the selection of appropriate sizes, piston pins, pistons and bushings of small connecting rod heads are sorted into four size groups, the diameters of which differ by 0.0025 mm. Each group has its own color designation. Marking paint is applied: at the piston - on the lower surface of one of the bosses, at the piston pin - on the inner surface at one end, on the connecting rod - at the small head.

The mating of the piston pin and the bushing of the upper head of the connecting rod is checked by inserting a pin, previously lubricated with engine oil, into the hole of the bushing. For proper mating, it is necessary that the connecting rod rotates on the pin from a horizontal position under the influence of its own weight, but at the same time, the pin inserted into the bushing should not fall out of it under the influence of its own weight if the pin is placed in a vertical position. In this case, it is allowed to equip connecting rods with pins of an adjacent group (in the direction of reducing the gap) provided that the above requirements are met.

In all cases, the selection of piston pins for connecting rods must be done in a room with an air temperature of (20 ± 3) ° C. Warning

If one of the connecting rods is replaced, it must be selected not only by the size of the small head bushing, but also by weight. The difference in mass of the heaviest and lightest connecting rods in a set installed on one engine should not exceed 8 g. A connecting rod belonging to the same weight group is marked with a mark on the boss of its cover.

Lubricate the selected finger with engine oil. Heat the piston by lowering it into a vessel with water at a temperature of 45–75 ° C, insert a finger into the holes of the piston bosses and the bushing of the small connecting rod head. Insert the piston pin retaining rings into the grooves of the piston bosses. Warning

The connecting rod is processed together with the cap and therefore the connecting rod caps are not interchangeable.

Piston sets with pins, circlips and piston rings supplied as spare parts