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
785173a6



3.3.1. Technical characteristics

GENERAL INFORMATION

Engine type
Six-cylinder two-row with water cooling and two camshafts in each head
2,5 l engine
3,0 l engine
Engine code
X25XE
X30XE
Diameter of the cylinder
81,6 mm
86,0 mm
Piston stroke
79,6 mm
85,0 mm
Volume
2498 cm3
2969 cm3
Maximum power
125 kW at 6000 rpm
155 kW at 6200 rpm
The maximum rotating moment
227 N of m at 3200 rpm
270 N of m at 3600 rpm
Sequence of operation of cylinders
1𣇽𣯗6 (the N1 cylinder is located from a gas-distributing belt of the right number of cylinders)
Direction of rotation of a bent shaft
Clockwise
Extent of compression
10,8: 1
Compression pressure:
   nominal
12 15 bars
   the maximum difference in pressure between two cylinders
1 bar
Camshaft
Cam height:
   2,5 l
9,2 mm
   3,0 l
10,0 mm
Lubrication system
Oil pump
Rotor type with the drive from a bent shaft
Minimum admissible pressure of oil idling (oil 80 temperature )
1,5 bars
Free wheeling of rotors of the oil pump:
   internal rotor
less than 0,08 mm
   external rotor
less than 0,10 mm

Moments of an inhaling, N. of m.

Bolts of a natyazhitel of an additional belt
35
Bolts of a dividing partition
8
Bolts of covers of bearings of the camshaft
8
Camshaft cover bolts
8
Camshaft sensor bolt
8
Camshaft asterisk bolt:
   step 1
50
   step 2
Tighten for 60
   step 3
Tighten for 15
Rod cover bolt:
   step 1
35
   step 2
Tighten for 45
   step 3
Tighten for 15
Bolts of a ventilating tube of the right block of cylinders
25
Bolt of an arm of the engine intended for fastening of the elevator
25
Bolts of the pump of cooling liquid
25
Bolts of a pulley of the pump of cooling liquid:
   step 1
8
   step 2
Tighten for 30
   step 3
Tighten for 30
Bolts of a ventilating tube of a case of the engine
8
Bolts of a pulley of a bent shaft
20
Bolts of a rotor of the sensor of a bent shaft
15
Bolt of an asterisk of a bent shaft:
   step 1
250
   step 2
Tighten for 45
   step 3
Tighten for 15
Bolts of a head of cylinders:
   step 1
25
   step 2
Tighten for 90
   step 3
Tighten for 90
   step 4
Tighten for 90
   step 5
Tighten for 15
Bolts of a branch pipe of cooling liquid of a head of cylinders
30
Bolts of a drive plate:
   step 1
65
   step 2
Tighten for 30
   step 3
Tighten for 15
Fastenings of the engine and transmission:
   left and right support:
      the nut fixing a support to a body
55
      the nut fixing a support to its arm
40
      the bolts fixing a support arm to the block of cylinders
60
      shock-absorber bolts
40
   back support:
      the bolts fixing a support to the transmission
40
      the nuts fixing a support to a cross-piece
20
      the bolts fixing a cross-piece to a body
45
      the bolts fixing the transmission to the engine:
      the bolts fixing the transmission to the block of cylinders
60
      the bolts fixing the transmission to a flange of the oil pallet
40
Flywheel bolts:
   step 1
65
   step 2
Tighten for 30
   step 3
Tighten for 15
Bolts of the block of covers of radical bearings:
   bolts of covers:
      step 1
50
      step 2
Tighten for 60
      step 3
Tighten for 15
Fitting of the block of covers
8
The bolts (M8) fixing the block of covers to the block of cylinders
20
Oil heater:
   cover bolts
20
   cover nuts
30
   bolts and nuts of connections of tubes of the oil heater
30
Oil filter
15
Screws of a cover of the oil pump
8
Fixing bolts of the oil pump:
   M6 bolts with an original back cover of a gas-distributing belt:
      initial moment of an inhaling
8
      final moment of an inhaling
10
   M6 bolts with the modified back cover of a gas-distributing belt
10
   M8 bolts:
      step 1
12
      step 2
20
Bolts of a maslozaborny branch pipe
8
Bolts of a pulley of the pump of the hydraulic booster of steering:
   step 1
20
   step 2
Tighten for 30
   step 3
Tighten for 15
Bolts of the oil pallet:
   pallet bolts:
      step 1
8
      step 2
Tighten for 30
Bolts of a cast part of the oil pallet:
   the bolts fixing a cast part to the block of cylinders and the oil pump
20
   the bolts fixing a cast part to the transmission
40
Cap of a drain opening of the oil pallet:
   a cap with a six-sided head
55
   a cap with a tetrahedral head
10
Bolts of a cover of a gas-distributing belt:
   external cover
8
   back cover:
      M6 bolts
8
      M8 bolts
10
Bolt of the lower directing pulley of a gas-distributing belt
40
Pulley of a natyazhitel and the top directing pulley of a gas-distributing belt:
   the bolts fixing an arm of pulleys to the block of cylinders
40
   nut of a pulley of a natyazhitel
20
   a bolt of the directing pulley
40