Opel Astra A

1991-1998 of release

Repair and operation of the car

Opel Astra A
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   - 3.1. SOHC engines
      3.1.1. Introduction
      3.1.2. Technical characteristics
      3.1.3. Check of a compression
      3.1.4. Top Dead Point (TDP)
      3.1.5. Cover of a head of cylinders
      3.1.6. Pulley of a kolechaty shaft
      + 3.1.7. Top external cover of a gas-distributing belt
      3.1.8. Back cover of a gas-distributing belt
      3.1.9. Gas-distributing belt (models of 1,4 and 1,6 l)
      3.1.10. A gas-distributing belt (C18 NZ, C20 NE which are released till 1993)
      3.1.11. Gas-distributing belt (C18 NZ, C20 NE 1993 of release later)
      3.1.12. Camshaft asterisk
      3.1.13. Asterisk of a bent shaft
      3.1.14. Tension roller of a gas-distributing belt (l models 1,4 and 1,6)
      3.1.15. Camshaft epiploons
      3.1.16. Camshaft
      3.1.17. Head of cylinders
      3.1.18. Oil pallet and maslozaborny branch pipe
      3.1.19. Oil pump
      3.1.20. Epiploons of a bent shaft
      3.1.21. Flywheel
      3.1.22. Fastening of the engine and transmission
   + 3.2. DOHC engines
   + 3.3. Diesel engines
   + 3.4. Engine electric equipment
+ 4. Ventilation and heating
+ 5. Power supply system
+ 6. System of decrease in toxicity
+ 7. Coupling
+ 8. Transmissions
+ 9. Half shafts
+ 10. Brake system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Electrical circuitries


3.1.5. Cover of a head of cylinders


1. Disconnect ventilating hoses (a photo at the left) from a cover of a head of cylinders (a photo on the right).
2. Unscrew all bolts from a cover and remove the clips and arms withheld by these bolts.
3. Uncover a head. If the cover sits too rigidly, slightly to a postukayta on it the wooden hammer. Remove old laying.


1. Before installation, examine an internal surface of a cover on existence of oil deposits or other pollution. Check a condition of the ventilating filter located in a cover. If necessary replace the filter. Clean a cover and the filter by means of water-soluble solvent and let's them dry out.
2. Check a condition of laying and if necessary replace it. On some models laying is established in a special fillet. Pith laying needs to be replaced every time.
3. Carefully clean the joined surfaces of a cover and a head of cylinders.
4. Put on a cover a head of cylinders.
5. Insert fixing bolts and establish the clips and arms removed earlier under their heads. Tighten bolts till the required inhaling moments.
6. Connect ventilating hoses.

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