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Mercedes S-class W2021993-2000 of releaseRepair and car operation |
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Mercedes W202 + 1.2. The general data + 2. Maintenance service - 3. Engines 3.1.2. Identification number + 3.1.3. The engine 3.1.4. Cars with the conditioner 3.1.5. The bottom cover of a motor compartment 3.1.6. Covers of cast apertures 3.1.7. Натяжитель chains + 3.1.8. A cover of a head of the block of cylinders + 3.1.9. A head of the block of cylinders + 3.1.10. Camshafts 3.1.11. Hydraulic тарельчатые pushers 3.1.12. Maslootrazhatelnye caps 3.1.13. Valves 3.1.14. Directing valves 3.1.15. Saddles of valves in a head of the block of cylinders 3.1.16. A compression + 3.1.17. A klinovyj belt 3.1.18. Diagnostics of malfunctions (DB) 3.1.19. Broad-brush observations 3.1.20. Repair work without engine dismantle + 3.1.21. Engine major repairs + 3.2. The diesel engine (ДД) 3.2.3. Cars with the conditioner 3.2.4. The bottom cover of a motor compartment 3.2.5. Covers of cast apertures 3.2.6. Натяжитель chains + 3.2.7. A camshaft + 3.2.8. A head of the block of cylinders + 3.2.9. Maslootrazhatelnye caps 3.2.10. A cover of a head of the block of cylinders (2,2/2,5) 3.2.11. Hydraulic тарельчатые pushers 3.2.12. Valves 3.2.13. Directing valves 3.2.14. Saddles of valves in a head of the block of cylinders 3.2.15. A head of the block of cylinders and the motor block 3.2.16. A compression 3.2.17. Клиновой a ridge belt 3.2.18. The pulling device клинового a ridge belt 3.2.19. Diagnostics of malfunctions (ДД) + 4. Greasing system + 5. Cooling system + 6. Heating, ventilation + 7. Ignition system + 8. Fuel system + 9. Transmission + 10. A running gear + 11. A steering + 12. Brake system + 13. A body + 14. An electric equipment + 14.2. Electroschemes |
3.1.16. A compression
Compression check allows to draw conclusions on an engine condition. At its check it is possible to establish, whether in norm valves or pistons (piston rings) or they are worn out. Besides, by results of the control it is possible to define, whether the engine is subject to replacement or it can be repaired in a complex. For check the device is necessary for the compression control. The pressure difference between separate cylinders should make a maximum 1,5 bar. If the difference in pressure makes more than 1,5 bar it is a sign of the defective valves, the worn out piston rings or the directing cylinder. If will reach a deterioration limit, it is necessary to repair or replace the engine. Pressure of compression should make: for the 4-cylinder engine 10–14 bar, for 6-cylinder nearby 12 bar. |
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