Opel Vectra A

since 1988-1995 release

Repair and operation of the car



Vektr's Opel And
+ 1. Maintenance instruction
+ 1.1 Maintenance
+ 2. Engine
- 3. Repair of DOHC engines
   3.2. General information
   3.3. Removal and installation of the engine
   3.4. Replacement of support of the power unit
   + 3.5. Gear belt, pulleys, pulley of the mechanism of a tension and intermediate pulley
   3.6. A gear belt with the automatic mechanism of a tension
   3.7. Forward sealing ring of the camshaft
   3.8. Camshafts
   3.9. Installation of a head of the block of cylinders on the engine installed in the car
   3.10. Installation of a head of the block of cylinders on the engine removed from the car
   3.11. Repair of a head of the block of cylinders
   3.12. Hydraulic pushers of valves
   3.13. Replacement of a forward sealing ring of a bent shaft
   3.14. Oil pallet
   3.15. Oil pump
   3.16. Oil heater
+ 4. Repair of the diesel engine
+ 5. Cooling system
+ 6. Fuel system
+ 7. The fuel and exhaust system of models with system of injection of fuel
+ 8. Exhaust system and system of decrease in toxicity of exhaust gases
+ 9. Fuel systems of the diesel engine
+ 10. Engine electrical systems
+ 11. Transmission
+ 12. Mechanical transmission
+ 13. Automatic transmission
+ 14. Power shafts
+ 15. Brake system
+ 16. Suspension bracket
+ 17. Body
+ 18. Electric equipment
+ 19. Check of malfunctions
how do you check a car battery how do you check a car battery



3. Repair of DOHC engines

3.1. Technical characteristic

GENERAL INFORMATION

The DOHC engine is an engine with two camshafts installed in a head of the block of cylinders.

Technical characteristics of DOHC engines same, as well as SOHC engines 2,0 liters except for below-mentioned.

General information

Type
All models The engine with four cylinders rowed, with water cooling, established cross in a forward part of the car. The drive of valves is carried out by two camshafts through hydraulic pushers, the gear belt put in action.
Codes of engines:
– 20 XEJ
2.0 l (1998 cm3)
– C20 XE
2.0 l (1998 cm3) + catalyst
– X20 XEV
2.0 l (1998 cm3) + catalyst, "Ecotec"
Extent of compression:
– 20 XEJ and C20 XE
10,5: 1
– X20 XEV
10,8: 1
Maximum power:
– 20 XEJ and C20 XE
110 kW (150 h.p.) at 6000 rpm
– X20 XEV
100 kW (136 h.p.) at 5400 rpm
Maximum torque:
– 20 XEJ
196 Nanometer at 4800 rpm
– C20 XE
   • till 1993
196 Nanometer at 4800 rpm
   • since 1993
196 Nanometer at 4600 rpm
– X20 XEV
185 Nanometer at 4000 rpm

Head of the block of cylinders

Full height of a head of the block of cylinders:
– 20 XEJ and C20 XE
135,58 – 135,68 mm
– X20 XEV
134,00 mm
Height of installation of the directing valve plug:
– 20 XEJ and C20 XE
10,70 – 11,00 mm
– X20 XEV
13,70 – 14,00 mm

Camshaft

Diameter of necks of bearings of the camshaft (all models)
27,939 – 27,960 mm
Diameter of the bearing of the camshaft (all models)
28,000 – 28,021 mm
Raising of a cam:
– 20 XEJ and C20 XE
9,5 mm
– X20 XEV
10,0 mm
The most admissible curvature of an axis of the camshaft:
– 20 XEJ and C20 XE
0,04 mm
– X20 XEV
0,06 mm
Axial side play (all models)
0,040 – 0,144 mm
Valve and guides of valves:
Full length of the new valve, mm:
Inlet
Final
– 20 XEJ and C20 XE
105,0
105,0
– X20 XEV
102,0
92,0
Full minimum length of the valve, mm:
– 20 XEJ and C20 XE
104,6
104,6
– X20 XEV
101,7
91,8
Diameter of a plate of the valve, mm:
– 20 XEJ and C20 XE
33,0±0,1
29,0±0,1
– X20 XEV
32,0±0,1
29,0±0,1
Diameter of a core of the valve (all engines), mm:
– 20 XEJ and C20 XE:
   • nominal
6,955 – 6,970
6,945 – 6,960
   • the repair size is 0,075 mm
7,030 – 7,045
7,020 – 7,035
   • the repair size is 0,150 mm
7,105 – 7,120
7,095 – 7,110
   • the repair size is 0,250 mm
7,205 – 7,220
7,195 – 7,210
– X20 XEV
   • nominal
5,955 – 5,970
5,945 – 5,960
   • the repair size is 0,075 mm
6,030 – 6,045
6,020 – 6,035
   • the repair size is 0,150 mm
6,105 – 6,120
6,095 – 6,110
Internal diameter of the directing plug of the valve, mm:
– 20 XEJ and C20 XE:
   • nominal
7,000 – 7,015
   • the repair size is 0,075 mm
7,075 – 7,090
   • the repair size is 0,150 mm
7,150 – 7,165
   • the repair size is 0,250 mm
7,400 – 7,415
– X20 XEV
   • nominal
6,000 – 6,015
   • the repair size is 0,075 mm
6,075 – 6,090
   • the repair size is 0,150 mm
6,150 – 6,165
   • the repair size is 0,250 mm
6,400 – 6,415

Lubrication system

Oil pressure on idling turns on the warm engine:
– 20 XEJ and C20 XE
2,5 bars
– X20 XEV
1,5 bars

Tightening moments

Bolts of fastening of the generator to the block of cylinders
35 Nanometer
Vacuum hose of the vacuum amplifier of brakes to an inlet collector
20 Nanometer
Cover of a head of the block of cylinders (M6)
9 Nanometer
Cover of a head of the block of cylinders (M8)
22 Nanometer
Cover of a head of the block of cylinders to a final collector (X20 XEV)
5 Nanometer
Sensor of impulses of a bent shaft
6 Nanometer
Reception exhaust pipe to an arm
12 Nanometer
Arm of an inlet collector to the block of cylinders
25 Nanometer
Arm of an intermediate shaft to the block of cylinders
55 Nanometer
The detonation sensor to the block of cylinders
20 Nanometer
Pipelines to an adapter / to the oil heater
30 Nanometer
Oil filter to the oil pump
15 Nanometer
Arm of a pipe of the masloizmeritelny probe to the block of cylinders
25 Nanometer
Perepuskna the valve to the oil pump
30 Nanometer
Adapter of the oil pump
23 Nanometer
Arm of the pump of the amplifier of steering
25 Nanometer
Cover of spark plugs to a head of the block of cylinders:
– 20 XEJ and C20 XE
8 Nanometer
– X20 XEV
6 Nanometer
Starter to the block of cylinders
45 Nanometer
Starter arm to the block of cylinders
25 Nanometer
Stopper of a temperature regulator (M20) *
30 Nanometer
Casing of a gear belt
8 Nanometer
Pulley of a gear belt to a bent shaft (*):
– stage 1
250 Nanometer
– stage 2
To tighten on a corner 45–50 °
The directing roller of a gear belt to an arm
25 Nanometer
The directing roller of a gear belt to the block of cylinders:
– engines till 1993:
   • stage 1
25 Nanometer
   • stage 2
To tighten on a corner 45 °
   • stage 3
To tighten on a corner 15 °
– engines since 1993
25 Nanometer
Transmission arm to the block of cylinders
60 Nanometer
Bolts of fastening of the transmission to the engine
60 Nanometer

* It is necessary to use only new bolts.