Opel Vectra A

since 1988-1995 of release

Repair and car operation



Vektr A. Opel
+ 1. Maintenance instruction
+ 1.1 Maintenance
- 2. Engine
   2.2. General information
   2.3. System of ventilation of a case
   2.4. Compression check
   2.5. Repair operations on the engine established in the car
   2.6. The repair operations demanding removal of the engine
   2.7. Recommendations about engine removal
   + 2.8. Removal and engine installation without a transmission
   + 2.9. Removal and engine installation together with a transmission
   2.10. Replacement of support of the engine and transmission
   2.11. Engine repair
   + 2.12. A gear belt and pulleys (without the automatic mechanism of a tension)
   2.13. A gear belt and the tension mechanism (l models 1,4 and 1,6 except С16 NZ2)
   2.14. An opening in a back casing of a gear belt on l models 1,4 and 1,6
   2.15. Gear belt and tension mechanism (l NZ2 1,8 and 2,0 C16 model)
   2.16. Forward sealing ring of a camshaft
   2.17. Back sealing ring of a camshaft
   2.18. Camshaft and camshaft case
   + 2.19. Removal and installation of a head of the block of cylinders on the engine in the car
   2.20. Removal and installation of a head of the block of cylinders on the removed engine
   + 2.21. Repair of a head of the block of cylinders
   2.22. Cleaning and survey of a head of the block of cylinders
   2.23. Hydraulic pushers of valves
   2.24. Flywheel
   2.25. Replacement of a forward sealing ring of a cranked shaft
   2.26. Replacement of a back sealing ring of a cranked shaft
   2.27. Oil pallet
   2.28. Oil pump
   2.29. Repair of the oil pump
   2.30. Removal and installation of pistons and rods
   2.31. Check of pistons and rods
   + 2.32. Removal and installation of a cranked shaft
   2.33. Check of a cranked shaft
   2.34. Survey and gap check in radical and shatunny bearings
   2.35. Check of a working gap of the bearing
   2.36. Check of the block of cylinders of the engine
   2.37. Engine start after major maintenance
+ 3. Repair of DOHC engines
+ 4. Repair of the diesel engine
+ 5. Cooling system
+ 6. Fuel system
+ 7. A fuel and exhaust system of models with system of injection of fuel
+ 8. Exhaust system and system of fall of toxicity of exhaust gases
+ 9. Fuel systems of the diesel engine
+ 10. Engine electrosystems
+ 11. Transmission
+ 12. Mechanical transmission
+ 13. Automatic transmission
+ 14. Power shafts
+ 15. Brake system
+ 16. Suspension bracket
+ 17. Body
+ 18. Electric equipment
+ 19. Check of malfunctions



2.4. Compression check

GENERAL INFORMATION

Check of a condition of the engine can be made by compression measurement in engine cylinders. If this check to make regularly, it is possible to learn in advance the beginning of wear of the engine, without waiting the moment when wear will be shown in low overall performance of the engine.

Warm up the engine to working temperature. Thus the accumulator should be completely charged. Unscrew spark plugs.

Disconnect ignition system for what disconnect from the ignition coil feeding wire of a low voltage (+ 15).

In an opening of a candle of the first cylinder establish компрессометр.

The assistant should press an accelerator pedal against the stop and turn the engine a starter. After a provorachivaniye of a cranked shaft or two turns pressure of compression should increase by one to a maximum, and then be stabilized. Make record of the maximum received result.

Similarly check a compression in other cylinders.

The compression in all cylinders should not differ more than on 1,0 bar. Pay attention that the size of a compression should increase quickly on the serviceable engine. The low compression on the first turn of a cranked shaft, сопровож dayemy on the subsequent turns of a cranked shaft indicates by gradual increase in pressure wear of piston rings.

The low compression on the first turn of a cranked shaft which slightly increases further, indicates a thinness of a prileganiye of the valves, the punched laying of a head of the block of cylinders or crack existence in a head of the block of cylinders. Wear of the ends of cores of valves can lead to a low compression also.

If a compression in one cylinder lowered, carry out the following test. Fill in through a candle opening in the cylinder of a little engine oil and check a compression.

If oil filling in the cylinder increases a compression, it specifies that the cylinder or piston rings is worn-out.

The low compression in two next cylinders indicates a laying burn-out between cylinders.

If the compression in one cylinder is less for 20 %, than in the others, and the engine works unstably idling, it indicates a worn-out cam of a camshaft.

If pressure of compression is too high, it specifies that the chamber of combustion is covered with a thick layer of a deposit.

After this check screw in spark plugs and connect a wire to the ignition coil.