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 bent shaft
+ 4.12. Block of cylinders of the engine
4.13. Pistons and rods
4.14. Bent shaft
- 4.15. Survey and choice of radical and conrod bearings
+ 4.15.2. Choice
4.16. Control of a side play of assembly of the balance weight (engine 5S-FE)
4.17. Engine balance of assembly at capital repairs
4.18. Installation of piston rings
+ 4.19. Installation of a bent shaft and check of working gaps of bearings
4.20. Installation of a back sealing ring of a bent 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. Decrease in toxicity
+ 9. Transmission
+ 10. Automatic transmission
+ 11. Coupling and power shafts
+ 12. Brake system
+ 13. Suspension bracket
+ 14. Body
+ 15. Electric equipment
Typical defects of bearings
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.
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. Nezavis мо from the reason of failure of the bearing the cause which caused a bearing exit out of operation before the engine repeatedly gathers has to be removed.
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 podshipn ки 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 the car 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, kondens руясь 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 lubricant.