Opel Vectra A

since 1988-1995 release

Repair and operation of the car



Vektr's Opel And
+ 1. Maintenance instruction
+ 1.1 Maintenance
- 2. Engine
   2.2. General information
   2.3. System of ventilation of a case
   2.4. Check of a compression
   2.5. Repair operations on the engine installed in the car
   2.6. The repair operations demanding removal of the engine
   2.7. Recommendations about removal of the engine
   + 2.8. Removal and installation of the engine without transmission
   + 2.9. Removal and installation of the engine together with the transmission
   2.10. Replacement of support of the engine and transmission
   2.11. Repair of the engine
   + 2.12. A gear belt and pulleys (without automatic mechanism of a tension)
   2.13. A gear belt and the mechanism of a tension (l models 1,4 and 1,6 except C16 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 mechanism of a tension (l C16 NZ2 models 1,8 and 2,0)
   2.16. Forward sealing ring of the camshaft
   2.17. Back sealing ring of the camshaft
   2.18. Camshaft and case of the camshaft
   + 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 bent shaft
   2.26. Replacement of a back sealing ring of a bent 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 bent shaft
   2.33. Check of a bent shaft
   2.34. Survey and check of a gap in radical and conrod bearings
   2.35. Check of a working gap of the bearing
   2.36. Check of the block of cylinders of the engine
   2.37. Start of the engine after capital repairs
+ 3. Repair of DOHC engines
+ 4. Repair of the diesel engine
+ 5. Cooling system
+ 6. Fuel system
+ 7. The fuel and exhaust system of models with system of injection of fuel
+ 8. Exhaust system and system of decrease in toxicity of exhaust gases
+ 9. Fuel systems of the diesel engine
+ 10. Engine electrical systems
+ 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. Check of a compression

GENERAL INFORMATION

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

Warm up the engine up to the working temperature. At the same time the accumulator has to be completely charged. Unscrew spark plugs.

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

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

The assistant has to press an accelerator pedal against the stop and turn the engine a starter. After a provorachivaniye of a bent shaft by one or two turns pressure of compression has to increase 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 bars. Pay attention that the size of a compression has to increase quickly on the serviceable engine. The low compression on the first turn of a bent shaft, сопровож dayemy indicates by gradual increase in pressure on the subsequent turns of a bent shaft wear of piston rings.

The low compression on the first turn of a bent shaft which slightly increases further indicates a thinness of a prileganiye of valves, the punched laying of a head of the block of cylinders or existence of a crack 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, then carry out the following test. Fill in through a candle opening in the cylinder of a little engine oil and check a compression.

If filling of oil 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 20% less, than in the others, and the engine idles unstably, it indicates a worn-out cam of the camshaft.

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

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