Opel Omega

since 1993-1999 release

Repair and operation of the car

Opel Omega
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Repair of engines
   + 3.1. SOHC engines of 2,0 liters
   + 3.2. DOHC engines of 2,0 liters
   - 3.3. 2,5 and 3,0 liters engines
      3.3.1. Technical characteristics
      3.3.2. Check of a compression
      3.3.3. Top Dead Point (TDP) of the N1 piston
      3.3.4. Covers of camshafts
      3.3.5. Pulley of a bent shaft
      3.3.6. Covers of a gas-distributing belt
      3.3.7. Gas-distributing belt
      3.3.8. Natyazhitel of a belt, asterisks and intermediate pulleys
      3.3.9. Epiploons of camshafts
      3.3.10. Camshafts and pushers
      3.3.11. Head of cylinders
      3.3.12. Oil pallet
      3.3.13. Oil pump
      3.3.14. Oil heater
      3.3.15. Flywheel and drive plate
      3.3.16. Epiploons of a bent shaft
      3.3.17. Fastenings of the engine and transmission
   + 3.4. Partition of all petrol engines
   + 3.5. 2,0 liters diesel engine
   + 3.6. 2,5 liters diesel six-cylinder engine
+ 4. Heating system and ventilation
+ 5. Fuel, exhaust systems
+ 6. System of start of the engine
+ 7. System of ignition
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, half shafts
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment


3.3.3. Top Dead Point (TDP) of the N1 piston


The highest point which is reached by the N1 piston at the time of a compression step is accepted to the top dead point.

The N1 piston is located in a forward part of the right number of cylinders from a gas-distributing belt.

1. Disconnect a wire of the minus plug of the accumulator and, if necessary, unscrew spark plugs.
2. Remove an external cover of a gas-distributing belt.
3. Turn a bent shaft so that synchronizing tags of asterisks of camshafts were directed up and combined with cuts in a cover of a gas-distributing belt (are specified by shooters). Do this procedure as for the right head of cylinders (the drawing at the left), and for left (the drawing on the right). On each asterisk there are two tags. The table on use of these tags is given below.
4. Combine a tag on a pulley of a bent shaft with the index (are specified by shooters) on a casing of the oil pump. When tags are combined, the N1 piston is in VMT at the time of a compression step.

Camshaft asterisks
Tag which needs to be used
final valves of the right head of cylinders
inlet valves of the right head of cylinders
inlet valves of the left head of cylinders
final valves of the left head of cylinders