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.