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
   - 3.4. Partition of all petrol engines
      3.4.1. Technical characteristics
      3.4.2. Check of a compression
      + 3.4.3. Engine partition
      3.4.4. Auxiliary elements of the engine
      + 3.4.5. Engine
      3.4.6. Engine partition
      3.4.7. Head of cylinders and valves
      3.4.8. Pistons and rods
      3.4.9. Bent shaft
      3.4.10. Block of cylinders
      3.4.11. Radical bearings and bearings of rods
      3.4.12. Piston rings
      3.4.13. The first start of the engine after a partition
   + 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



3.4.9. Bent shaft

PERFORMANCE ORDER
2,0 liters engines

1. Remove the oil pump and a flywheel.
2. Remove pistons and rods.
3. Check a free wheeling of a bent shaft.
4. Covers of radical bearings have to be numbered by from 1 to 5. If covers are not numbered, number them. The cover of N1 is from a gas-distributing belt.
5. Unscrew bolts of covers, uncover together with inserts of bearings.
6. Remove a bent shaft.
7. Remove inserts from the block of cylinders and remove half rings of the central bearing.
2,5 and 3,0 liters engines
8. Remove the oil pump and a flywheel.
9. Remove pistons and rods.
10. Check a free wheeling of a bent shaft.
11. Unscrew four bolts of the block of the covers fixing the block to the block of cylinders.
12. Unscrew the remained eight bolts of the block of covers, get bolts and remove the block.
13. Covers of radical bearings have to be numbered by from 1 to 3. The cover of N1 is from a gas-distributing belt. If covers are not numbered, number them.
14. Uncover together with inserts of bearings.
15. Remove a bent shaft.
16. Remove inserts from the block of cylinders and remove half rings of the central bearing.

Check of a free wheeling of a shaft

For conducting check the bent shaft has to be installed in the block of cylinders.

PERFORMANCE ORDER
Check a free wheeling of a shaft by means of the special measuring tool (the drawing at the left) or by means of measuring probes (the drawing on the right).

Check

PERFORMANCE ORDER
1. Clean a bent shaft solvent and dry up it compressed air.
2. Examine necks of bearings of a bent shaft on existence of wear tracks, scratches, corrosion or cracks. Rub a copper coin on the bearing. If the bearing erases copper, so its surface is too rough, and it needs to be processed.
3. Examine a bent shaft on existence of cracks or other damages.
4. Measure diameters of radical and conrod bearings. Check necks of bearings for conicity and ovality.
5. Check necks of epiploons of a bent shaft for existence of wear tracks or damages. If epiploons wiped flutes on necks, then new epiploons will pass oil.
6. Measure a shaft beating.
7. At detection of wear, damages and any discrepancies to technical characteristics address experts.

Selection of inserts

For the correct selection of inserts be guided by the size of a lubricant gap which can be measured by means of a plastic measuring tape. At emergence of any problems with selection of inserts address experts.

Check of a lubricant gap of radical bearings

PERFORMANCE ORDER
1. Carefully clean back surfaces of inserts.
2. Establish inserts, having combined their ledges (it is specified by an arrow) with deepenings in covers and the block of cylinders.
3. For measurement of a lubricant gap it is possible to use an internal micrometer or other special device, but the most exact and easy method – to use the special plastic measuring instrument.
4. Clean a bent shaft, bearings and lubricant openings, then accurately install a bent shaft on bearings.
5. Put a plastic piece on each of radical bearings along a shaft axis.
6. Establish covers of radical bearings, trying not to shift plastic. Tighten fixing bolts of covers till the required inhaling moment. Do not turn a bent shaft.
7. Unscrew bolts, and accurately uncover.
8. Measure width of the crushed film by means of a special scale for determination of size of a lubricant gap.
9. If the size of a gap does not conform to technical requirements, establish inserts of other size.
10. Carefully remove film traces from a shaft and bearings.

Final installation of a bent shaft

PERFORMANCE ORDER
2,0 liters engines
1. Accurately remove a bent shaft. If you establish a new shaft, do not forget to rearrange a shaft sensor rotor (bolts of fastening are specified by shooters).
2. Establish inserts of bearings. Inserts with side ledges (A) are established on the central bearing (N3) in the 2,0 liters engines and on the back bearing (N4) in the 2,5 and 3,0 liters engines. Other inserts have no ledges (In).
3. Clear a surface of the top inserts and oil them lubricant or engine. Check that bearings of a bent shaft were pure and establish a bent shaft into place.
4. Grease and establish the lower inserts. Establish covers of radical bearings.
5. Clean a back cover and fill side grooves of a cover with N15 03 295 sealant. Establish a back cover.
6. Oil bolts of covers engine, insert bolts and tighten them a hand.
7. Tighten bolts of covers of vsekhkorenny bearings till the required inhaling moment.
8. Hold on bolts on a necessary corner.
9. Turn a bent shaft a hand several times and check ease of the course.
2,5 and 3,0 liters engines
10. Establish a bent shaft.
11. Establish inserts in covers of bearings and install covers 1–3 in the block of cylinders.
12. Clean a back cover and fill side grooves of a cover with N15 03 295 sealant.
13. Establish a back cover.
14. Install the block of covers so that the arrow on the block was directed towards a gas-distributing belt.
15. Grease carvings of new bolts of the block of covers and insert bolts.
16. Tighten bolts till the required inhaling moment.
17. Hold on bolts on a necessary corner.
18. After you tightened bolts, squeeze out a little more sealant in grooves of a back cover (are specified by shooters). Sealant has to begin to flow from joints.
19. Turn a bent shaft a hand several times and check ease of the course.
20. Twist in the block of covers of the plug (are specified by shooters) with the carving cut in them and tighten them till the required inhaling moment.
21. Insert the bolts fixing the block of covers to the block of cylinders.
22. Tighten bolts (are specified by shooters) till the required inhaling moment.