since 1993-1999 release
Repair and operation of the car
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Repair of engines
+ 3.1. SOHC engines of 2,0 liters
+ 3.2. DOHC engines of 2,0 liters
+ 3.3. 2,5 and 3,0 liters engines
+ 3.4. Partition of all petrol engines
- 3.5. 2,0 liters diesel engine
3.5.1. Technical characteristics
3.5.2. Repair operations on the engine installed in the car
3.5.3. Check of pressure of compression 3_5_4.htm
3.5.5. Gas distribution mechanism
3.5.6. Cover of a head of the block of cylinders
3.5.7. Pulley of a bent shaft
3.5.8. Chain cover
3.5.9. Natyazhiteli of a chain
3.5.10. Chains and asterisks
3.5.11. Camshafts and pushers
3.5.12. Head of the block of cylinders
3.5.13. Oil pallet
3.5.14. Oil pump
3.5.15. Oil heater
3.5.16. Sealing rings of a bent shaft
3.5.18. Suspension brackets of the power unit
- 3.5.19. Capital repairs of the 2,0 liters diesel engine
126.96.36.199. Technical characteristics
188.8.131.52. Head of the block of cylinders
184.108.40.206. Pistons and rods
220.127.116.11. Bent shaft
18.104.22.168. Block of cylinders of the engine
22.214.171.124. Radical bearings and bearings of rods
126.96.36.199. Engine balance of assembly at capital repairs
188.8.131.52. Piston rings
184.108.40.206. Working gaps of radical bearings
220.127.116.11. Working gaps of conrod bearings
18.104.22.168. Start of the engine after capital repairs
+ 3.6. 2,5 liters diesel six-cylinder engine
+ 4. Heating system and ventilation
+ 5. Fuel, exhaust systems
+ 6. System of start of the engine
+ 7. System of ignition
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, half shafts
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment
Even while radical and conrod bearings are subject to replacement at capital repairs of the engine, they need to be examined carefully as they can give valuable information concerning a condition of the engine.
Identification tag arrangement on the basis of the bearing
Typical defects of bearings
Failure of the bearing can happen because of a lack of lubricant, presence of dirt or other foreign debris, an overload of the engine or corrosion. Irrespective of the reason of failure of the bearing it has to be eliminated before the engine repeatedly gathers.
At survey of bearings remove them and spread out in the same order as they were established on the engine. It will allow to define the corresponding neck of a bent shaft and will facilitate search of malfunctions.
Foreign debris can get to the engine in various ways. Metal particles can is in engine oil as a result of normal wear of the engine. Small particles together with engine oil can get to bearings and easily take root into soft material of the bearing. Big particles, getting to the bearing, will scratch the bearing or a neck of a bent shaft. The best prevention of failure of the bearing for this reason – carefully clear all internal surfaces of the engine and you keep them clean at assembly of the engine. Also frequent and regular replacement of oil with the filter is recommended.
Insufficient lubricant of necks of a bent shaft can be caused by many different reasons, such as high temperature of oil, an overload of the engine and leak of oil.
The driving manner also exerts impact on durability of the bearing. Completely open butterfly valve at low turns of the engine creates high load of bearings and expression from a zone of contact of an oil film. These loadings lead to emergence of cracks in a working part of the bearing that weakens the bearing and can lead to a separation of an antifrictional layer from a steel basis.
The movement on short distances leads to corrosion of bearings as a result the engine does not come to the stabilized working temperature at which water vapor and corrosion gases are removed. These couples and gases, being condensed in engine oil, form acid and a deposit. Acid together with engine oil gets to bearings, and corrosion of bearings begins.
The wrong selection of bearings at assembly of the engine also leads to failure of bearings. The bearings installed with a preliminary tightness leave an insufficient working gap of the bearing therefore there is no butter layer for lubricant.