Opel Omega

since 1993-1999 of release

Repair and car operation

Opel Omega
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Repair of engines
   + 3.1. SOHC engines in volume 2,0 liters
   + 3.2. DOHC engines in volume 2,0 liters
   + 3.3. Engines in volume 2,5 and 3,0 liters
   + 3.4. Partition of all petrol engines
   - 3.5. Diesel engine in volume 2,0 liters
      3.5.1. Technical characteristics
      3.5.2. Repair operations on the engine established in the car
      3.5.3. Check of pressure of compression 3_5_4.htm
      3.5.5. Gazoraspredeleniye mechanism
      3.5.6. Cover of a head of the block of cylinders
      3.5.7. Pulley of a cranked shaft
      3.5.8. Chain cover
      3.5.9. Natyazhiteli of a chain
      3.5.10. Chains and asterisks
      3.5.11. Camshafts and pushers
      3.5.12. Head of the block of cylinders
      3.5.13. Oil pallet
      3.5.14. Oil pump
      3.5.15. Oil radiator
      3.5.16. Sealing rings of a cranked shaft
      3.5.17. Flywheel
      3.5.18. Suspension brackets of the power unit
      - 3.5.19. Major maintenance of the diesel engine in volume 2,0 liters Technical characteristics Head of the block of cylinders Pistons and rods Cranked shaft Block of cylinders of the engine Radical bearings and bearings of rods Engine balance of assembly at major maintenance Piston rings Working gaps of radical bearings Working gaps of shatunny bearings Engine start after major maintenance
   + 3.6. Diesel six-cylinder 2,5-liter engine
+ 4. Heating system and ventilation
+ 5. Fuel, exhaust systems
+ 6. System of start of the engine
+ 7. Ignition system
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, semi-axes
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment Pistons and rods


Piston and rod

1–lock ring

2–piston finger

3–an arrow on a piston head



6–rod label


For fastening of the bottom head of a rod it is necessary to use new bolts and nuts.


1. Remove a head of the block of cylinders, the oil pallet and a pipe of a maslopriyemnik.
2. On all models if there is a deposit in the top part of the cylinder, remove it with a scraper from a soft material. Step existence in the top part of the cylinder testifies to excessive wear of the cylinder and need of boring of the cylinder of the engine.
3. Check a lateral gap of all bottom heads of a rod.
4. Using a hammer and a center punch or paint, note the provision of a cover of the bottom head of a rod and cylinder number.
5. Turn a cranked shaft so that pistons of the first and fourth cylinders were established in the bottom dead point.
6. Unscrew bolts of fastening of a cover of the bottom head of a rod of the first cylinder. Remove the bottom cover of a rod.
7. Using the hammer handle, вытолкните the piston up the block of cylinders also take it from the block of cylinders.
8. On the bottom head of a rod establish a cover of a rod and screw nuts that will allow to keep them in a set and not to mix in places.
9. Similarly remove the piston of the fourth cylinder.
10. Turn a cranked shaft on 180 ° for installation of pistons of the second and third cylinder in the bottom dead point and similarly remove pistons.


Measurement of diameter of a piston finger

Before check of pistons with rods remove from pistons piston rings and carefully clear pistons.

1. For removal of piston rings from pistons unclench a ring, insert under a ring evenly on a circle two or three old edges щупа and on them shift a ring from the piston.


Be careful, do not scratch the piston the ring ends. Rings very fragile also can burst, if them to unclench very strongly. Working edges of piston rings very sharp, therefore address with them very carefully not to be cut. Hold each set of rings together with pistons for repeated installation them on the places.

2. Clear all traces of a deposit from the top part of the piston.
3. Remove a deposit from flutes under piston rings in the piston, using an old piston ring.
4. After removal of a raid clear the piston with a rod the corresponding solvent and wipe dry.
5. Carefully examine each piston on existence of cracks round a skirt and openings under a piston finger.
6. Check wear on a piston skirt, an opening in a piston head, and also burned in the top part of the piston.
7. Traces of dot corrosion on the piston specify that cooling liquid got to the chamber of combustion. It is necessary to find the reason of hit of liquid in the chamber of combustion and to eliminate it.
8. Measure diameter of the piston.
9. Define a piston gap in the cylinder for what from diameter of the cylinder take away diameter of the piston and divide into two.
10. Check each rod on wear and existence of cracks, and also form distortion.
11. Piston fingers are established on sliding landing and fixed in the piston by two lock rings. On these engines pistons and rods can be divided as follows.
12. Using an edge of a thin screw-driver, remove from the piston a lock ring and a hand squeeze out a piston finger. At repeated installation of a piston finger use only new lock rings.
13. Check a piston finger and the bearing of the top head of a rod on wear.
14. Rods usually do not demand replacement if before it there was no engine jamming.
15. Collect the piston and a rod so that the arrow on a head of the piston showed aside, opposite from a label on a rod.
16. Grease a piston finger and insert it into the piston and the top head of a rod. Check, that the piston easy and freely turned on a piston finger.
17. Fix a piston finger new lock rings. Check, that each lock ring was correctly located in a piston flute. Establish lock rings so that their locks were directed up.
18. The cut of a lock ring should be directed up the piston.

Installation of pistons with rods

On engines are applied both standard loose leaves of bearings, and nadrazmerny, after repolishing of a cranked shaft. The demanded size of the loose leaf can be defined after measurement of a neck of a cranked shaft.

1. Clear a back part of the shatunny loose leaf and a place of its installation in rods and covers of rods.
2. Grease pistons and piston rings with pure engine oil and place locks of piston rings according to requirements.
3. Installation of pistons is necessary for beginning with the first cylinder. Compress piston rings on the piston the special adaptation for compression of piston rings.
4. Insert the piston with an opravka compressing rings in the top part of the first cylinder. Thus the arrow on a head of the piston should be directed to a chain of a drive of the mechanism of a gazoraspredeleniye. Using wooden whetstone or the hammer handle, press on the piston and press it into the cylinder.
5. Check combination of the bottom head of a rod with a neck of a cranked shaft and, if necessary, tighten the piston a rod and establish the bottom head of a rod with the loose leaf on a neck of a cranked shaft.
6. Establish a cover of the bottom head of a rod with the loose leaf. Thus the ledge on a cover of a rod should be directed to a flywheel.
7. In some stages tighten bolts of fastening the demanded moment.
8. Similarly establish other three piston and a rod.
9. Turn a cranked shaft and check that it rotates easily and without jammings.
10. Establish a pipe of a maslopriyemnik, the oil pallet and a head of the block of cylinders.