Opel Vectra B

since 1995 of release

Repair and car operation

Vektr B. Opel
+ 1.1. Governing bodies and control devices
+ 2. Maintenance
- 3. Engines
   - 3.1. Repair of the SOCH engine established in the car
      3.1.1. Introduction
      3.1.2. Technical characteristics
      3.1.3. Check of pressure of compression
      3.1.4. Top dead point (VMT) of the piston of the first cylinder
      3.1.5. Cover of a head of the block of cylinders
      3.1.6. Pulley of a cranked shaft
      3.1.7. Casings of a gear belt
      3.1.8. Gear belt
      3.1.9. Mechanism of a tension of a gear belt and pulleys
      3.1.10. Replacement of a sealing ring of a cam-shaft
      3.1.11. Cam-shaft and cam-shaft cases
      3.1.12. Hydraulic pushers
      3.1.13. Head of the block of cylinders
      3.1.14. Oil pallet
      3.1.15. Oil pump
      3.1.16. Drive flywheel / plate
      3.1.17. Replacement of sealing rings of a cranked shaft
      3.1.18. Suspension bracket of the power unit
   + 3.2. Repair of the DOCH engine established in the car
   + 3.3. Repair of the diesel engine of 1,7 l established in the car
   + 3.4. Repair of the diesel engine of 2,0 l established in the car
   + 3.5. Major maintenance of engines
+ 4. Heating, ventilation
+ 5. Fuel system
+ 6. Systems of start, ignition
+ 7. Transmission
+ 8. Brake system
+ 9. Running gear
+ 10. Body
+ 11. Electric equipment
+ 12. Main malfunctions


3.1.3. Check of pressure of compression


Check of a condition of the engine can be made by measurement of pressure of compression in 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.

1. Warm up the engine to working temperature, thus the accumulator should be completely charged. Unscrew spark plugs.
2. Remove sockets from fuel nozzles of system of injection of fuel.
3. In an opening of a candle of the first cylinder establish компрессометр.
4. 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 most received result.
5. Similarly check other cylinders.

Pressure of compression in all cylinders should not differ more than on two units. Pay attention that the size of compression should increase quickly on the serviceable engine; low pressure of compression on the first turn of a cranked shaft accompanied by gradual increase in pressure on the subsequent turns of a cranked shaft indicates wear of piston rings. The low size of pressure 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 result in low pressure of compression also.

Opel does not define exact pressure of compression, however if pressure of compression in cylinders less than 10, tells it about wear of the engine.

If pressure 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 pressure of compression.

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

Low pressure in two next cylinders indicates a laying burn-out between cylinders.

If pressure 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 to them high-voltage wires.