1992-1997 of release
Repair and operation of the car
+ General data
+ 1. Maintenance
+ 2. Engine
+ 3. Six-cylinder V6 engines
- 4. Capital repairs of engines
4.2. General information
4.3. Check of a compression
4.4. Recommendations about removal of the engine
+ 4.5. Removal and installation of the engine
4.6. Sequence of dismantling of the engine
4.7. Dismantling of a head of the block of cylinders
+ 4.8. Cleaning and survey of a head of the block of cylinders
4.9. Assembly of a head of the block of cylinders
4.10. Removal of pistons with rods
4.11. Removal of a cranked shaft
+ 4.12. Block of cylinders of the engine
4.13. Pistons and rods
4.14. Cranked shaft
- 4.15. Survey and choice of radical and shatunny bearings
+ 4.15.2. Choice
4.16. Control of a side play of assembly of the balance weight (engine 5S-FE)
4.17. Balance of assembly of the engine at capital repairs
4.18. Installation of piston rings
+ 4.19. Installation of a cranked shaft and check of working gaps of bearings
4.20. Installation of a back sealing ring of a cranked shaft
4.21. Installation of pistons and rods, check of working gaps of bearings
4.22. Installation of assembly of the balance weight (engine 5S-FE)
4.23. Start of the engine after capital repairs
+ 5. Cooling and heating
+ 6. Fuel system
+ 7. System of ignition
+ 8. Toxicity decrease
+ 9. Transmission
+ 10. Automatic transmission
+ 11. Coupling and power shafts
+ 12. Brake system
+ 13. Suspension bracket
+ 14. Body
+ 15. Electric equipment
4.15. Survey and choice of radical and shatunny bearings
Typical defects of bearings
Even thus that radical and shatunny 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.
Failure of the bearing can happen because of a lack of greasing, presence of dirt or other alien particles, an overload of the engine or corrosion. Nezavis mo from the reason of failure of the bearing the reason which caused a bearing exit out of operation 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 cranked shaft and will facilitate search of malfunctions.
Alien particles 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 podshipn ki 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 cranked shaft. The best prevention of failure of the bearing for this reason, carefully clear all internal surfaces of the engine and keep them clean at assembly of the engine. Also frequent and regular replacement of oil with the filter is recommended.
Insufficient greasing of necks of a cranked 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 the car also has 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 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, kondens ruyas 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 a nedost an exact working gap of the bearing therefore the umensha etsyatsya or there is no butter layer for greasing.