Opel Vectra A

since 1988-1995 of release

Repair and car operation



Vektr A. Opel
+ 1. Maintenance instruction
+ 1.1 Maintenance
+ 2. Engine
- 3. Repair of DOHC engines
   3.2. General information
   3.3. Removal and engine installation
   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 a camshaft
   3.8. Camshafts
   3.9. Installation of a head of the block of cylinders on the engine established in the car
   3.10. Installation of a head of the block of cylinders on the engine which has been 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 cranked shaft
   3.14. Oil pallet
   3.15. Oil pump
   3.16. Oil radiator
+ 4. Repair of the diesel engine
+ 5. Cooling system
+ 6. Fuel system
+ 7. A fuel and exhaust system of models with system of injection of fuel
+ 8. Exhaust system and system of fall of toxicity of exhaust gases
+ 9. Fuel systems of the diesel engine
+ 10. Engine electrosystems
+ 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



3. Repair of DOHC engines

3.1. Technical characteristics

GENERAL INFORMATION

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

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

General information

Type
All models The engine with four cylinders rowed, with the water cooling, established cross-section in a forward part of the car. The drive of valves is carried out by two camshafts through the hydraulic pushers, a 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 capacity:
– 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 Nanometers at 4800 rpm
– C20 XE
   • till 1993
196 Nanometers at 4800 rpm
   • since 1993
196 Nanometers at 4600 rpm
– X20 XEV
185 Nanometers 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 plug of the valve:
– 20 XEJ and C20 XE
10,70-11,00 mm
– X20 XEV
13,70-14,00 mm

Camshaft

Diameter of necks of bearings of a camshaft (all models)
27,939-27,960 mm
Diameter of the bearing of a camshaft (all models)
28,000-28,021 mm
Cam lifting:
– 20 XEJ and C20 XE
9,5 mm
– X20 XEV
10,0 mm
The most admissible curvature of an axis of a camshaft:
– 20 XEJ and C20 XE
0,04 mm
– X20 XEV
0,06 mm
Axial люфт (all models)
0,040-0,144 mm
The valve and directing valves:
Full length of the new valve, mm:
The inlet
The 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:
   • the nominal
6,955-6,970
6,945-6,960
   • repair size of 0,075 mm
7,030-7,045
7,020-7,035
   • repair size of 0,150 mm
7,105-7,120
7,095-7,110
   • repair size of 0,250 mm
7,205-7,220
7,195-7,210
– X20 XEV
   • the nominal
5,955-5,970
5,945-5,960
   • repair size of 0,075 mm
6,030-6,045
6,020-6,035
   • repair size of 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:
   • the nominal
7,000-7,015
   • repair size of 0,075 mm
7,075-7,090
   • repair size of 0,150 mm
7,150-7,165
   • repair size of 0,250 mm
7,400-7,415
– X20 XEV
   • the nominal
6,000-6,015
   • repair size of 0,075 mm
6,075-6,090
   • repair size of 0,150 mm
6,150-6,165
   • repair size of 0,250 mm
6,400-6,415

Greasing system

Pressure of oil on idling turns on the warm engine:
– 20 XEJ and C20 XE
2,5 bar
– X20 XEV
1,5 bar

Tightening moments

Bolts of fastening of the generator to the block of cylinders
35 Nanometers
Vacuum hose of the vacuum amplifier of brakes to an inlet collector
20 Nanometers
Cover of a head of the block of cylinders (М6)
9 Nanometers
Cover of a head of the block of cylinders (М8)
22 Nanometers
Cover of a head of the block of cylinders to a final collector (X20 XEV)
5 Nanometers
Sensor of impulses of a cranked shaft
6 Nanometers
Reception exhaust pipe to an arm
12 Nanometers
Arm of an inlet collector to the block of cylinders
25 Nanometers
Arm of an intermediate shaft to the block of cylinders
55 Nanometers
The detonation sensor to the block of cylinders
20 Nanometers
Pipelines to an adapter / to an oil radiator
30 Nanometers
The oil filter to the oil pump
15 Nanometers
Arm of a pipe masloizmeritelny щупа to the block of cylinders
25 Nanometers
Perepuskna the valve to the oil pump
30 Nanometers
Adapter of the oil pump
23 Nanometers
Arm of the pump of the amplifier of a steering
25 Nanometers
Cover of spark plugs to a head of the block of cylinders:
– 20 XEJ and C20 XE
8 Nanometers
– X20 XEV
6 Nanometers
Starter to the block of cylinders
45 Nanometers
Starter arm to the block of cylinders
25 Nanometers
Stopper of a temperature regulator (М20) *
30 Nanometers
Casing of a gear belt
8 Nanometers
Pulley of a gear belt to a cranked shaft (*):
– stage 1
250 Nanometers
– stage 2
To tighten on a corner 45–50 °
Directing roller of a gear belt to an arm
25 Nanometers
Directing roller of a gear belt to the block of cylinders:
– engines to 1993 g:
   • stage 1
25 Nanometers
   • stage 2
To tighten on a corner 45 °
   • stage 3
To tighten on a corner 15 °
– engines from 1993 g
25 Nanometers
Transmission arm to the block of cylinders
60 Nanometers
Bolts of fastening of a transmission to the engine
60 Nanometers

* It is necessary to use only new bolts.