3.2.1. Technical characteristic
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.