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
      3.3.1. Technical characteristics
      3.3.2. Compression check
      3.3.3. Top dead point (VMT) of the N1 piston
      3.3.4. Covers of camshafts
      3.3.5. Pulley of a cranked 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 radiator
      3.3.15. Flywheel and leading disk
      3.3.16. Epiploons of a cranked shaft
      3.3.17. Engine and transmission fastenings
   + 3.4. Partition of all petrol engines
   + 3.5. Diesel engine in volume 2,0 liters
   + 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


3.3.1. Technical characteristics

GENERAL INFORMATION

Engine type
Six-cylinder dvukhryadny with water cooling and two camshafts in each head
 
Engine in volume of 2,5 l
Engine in volume of 3,0 l
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 capacity
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
1–2–3–4–5–6 (the N1 cylinder is located from a gas-distributing belt of the right number of cylinders)
Direction of rotation of a cranked shaft
Clockwise
Extent of compression
10,8: 1
Pressure of compression:
  – the nominal
12-15th bar
  – 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
Greasing system
Oil pump
Rotor type with a drive from a cranked shaft
Minimum admissible pressure of oil idling (oil 80 temperature °)
1,5 bar
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 a camshaft
8
Bolts of a cover of a camshaft
8
Bolt of the sensor of a camshaft
8
Bolt of an asterisk of a camshaft:
  – step 1
50
  – step 2
Tighten for 60 °
  – step 3
Tighten for 15 °
Bolt of a cover of a rod:
  – 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 lift
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 cranked shaft
20
Bolts of a rotor of the sensor of a cranked shaft
15
Bolt of an asterisk of a cranked 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 leading disk:
  – step 1
65
  – step 2
Tighten for 30 °
  – step 3
Tighten for 15 °
Engine and transmission fastenings:
  – left and right support:
     • a nut, fixing a support to a body
55
     • a nut, fixing a support to its arm
40
     • the bolts, support fixing an arm to the block of cylinders
60
     • shock-absorber bolts
40
  – back support:
     • the bolts, fixing a support to a 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 a transmission to the engine:
     • the bolts, fixing a transmission to the block of cylinders
60
     • the bolts, fixing a 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 (М8), fixing the block of covers to the block of cylinders
20
Oil radiator:
  – cover bolts
20
  – cover nuts
30
  – bolts and nuts of connections of tubes of an oil radiator
30
Oil filter
15
Screws of a cover of the oil pump
8
Fixing bolts of the oil pump:
  – bolts М6 with an original back cover of a gas-distributing belt:
     • initial moment of an inhaling
8
     • final moment of an inhaling
10
  – bolts М6 with the modified back cover of a gas-distributing belt
10
  – bolts М8:
     • 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 a 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 a 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:
     • bolts М6
8
     • bolts М8
10
Bolt of the bottom 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 a directing pulley
40