Identification
Engine type plate
- (a) legislation type
- (b) identification marking
- (c) production serial number
Data
| engine code | DW8B |
|---|---|
| engine legislative type | WJZ |
| number of cylinders | 4 |
| capacity (cc) | 1868 |
| bore x stroke (mm) | 82.2 x 88 |
| compression ratio | 23/1 |
| maximum power (EEC) | 51 KW at 4600 revs/min |
| maximum power (DIN) | 70 cv at 4600 revs/min |
| maximum torque (EEC) | 10.5 daNm at 2500 r.p.m. |
| emission control standards | L4 |
| fuel | diesel |
| catalytic converter | yes |
| injection system | mechanical injection pump |
| make | DELPHI DIESEL SYSTEM |
| type of injection | DCN2 |
| EGR valve | yes |
Cylinder head
The cylinder head can be identified by the presence of holes in the bosses located under the diesel injectors
Cylinder head gasket
Metal multi-layer cylinder head gaskets for sealing with the cylinder block (6 thickness categories)
(a) - engine code: 2 hole(s) = DW8B
(b) - thickness identification mark
| piston protrusion (mm) | thickness (mm) | number of notches at B |
|---|---|---|
| 0.51 to 0.55 | 1.26 | 1 (1) |
| 0.56 to 0.59 | 1.30 | 2 (1 - 2) |
| 0.60 to 0.63 | 1.34 | 3 (1 - 2 - 3) |
| 0.64 to 0.67 | 1.38 | 4 (1 - 2 - 3 - 4) |
| 0.68 to 0.71 | 1.42 | 5 (1 - 2 - 3 - 4 - 5) |
| 0.72 to 0.75 | 1.46 | 2 (1 - 5) |
Timing gear
Camshaft
(d): short camshaft with or without paint mark
Valve timing chart
Measurement with a theoretical valve play of 0.8 mm (timing check)
| Before Top Dead Centre | 4° |
|---|---|
| After Bottom Dead Centre | 35° |
| Before Bottom Dead Centre | 43°' |
| After Top Dead Centre | 0° |
The valve clearance cold is obtained by shims of different thicknesses placed between the tappet and the valve stem
- Inlet valve: 0.15 mm
- Exhaust valve: 0.30 mm
Cylinder head tightening
WarningProceed bolt by bolt in the order shown
Pre-tighten to 2 ± 0.2 daNm (in the order from 1 to 10)
Tightening torque to 6 ± 0.6 da.Nm (in the order from 1 to 10)
Angular tightening to 180 ± 5° (in the order from 1 to 10)
Engine flywheel (identification)
(e): detection of the engine speed and of the TDC (2 target wheels indicated)
Position a ruler passing through the centre of the engine flywheel and the centre of the centring hole (f)
The target wheel (e) must be to the right of the ruler
Ø A = 203 mm (clutch disc contact surface)
Engine: tightening torques
Reciprocating gear
| designation | tightening torques |
|---|---|
| main bearing cap bolts | 7 ± 0.7 daNm |
| big end nuts | pre-tighten the nuts to 2 dan.m and carry out angular tightening to 70 ± 5 ° |
| ancillaries drive pulley hub | Pre-tighten to 4 daNm then effect angular tightening of 55 ± 5° |
| ancillaries drive pulley | 1 ± 0.1 daNm |
Cylinder block
| designation | tightening torques |
|---|---|
| underside of piston jet | 1 ± 0.1 daNm |
| lower cover | 1.6 ± 0.2 daNm |
| timing belt roller bearing | 4.3 ± 0.4 daNm |
| timing belt tensioner roller | 2.1 ± 0.2 daNm |
Cylinder head
| designation | tightening torques |
|---|---|
| camshaft bearing housings | 2 ± 0.2 daNm |
| exhaust manifold | 3 ± 0.3 daNm |
| cylinder head cover | 0.5 ± 0.1 daNm |
| camshaft hub | 4.3 ± 0.4 daNm |
| camshaft pulley - camshaft hub | 2.3 ± 0.2 daNm |
Engine flywheel - clutch
| designation | tightening torques |
|---|---|
| engine flywheel | 4.8 ± 0.5 daNm |
| clutch mechanism | 2 ± 0.2 daNm |
Lubrication system
| designation | tightening torques |
|---|---|
| oil pump | 2.3 ± 0.2 daNm |
| coolant/oil heat exchanger | 7 ± 0.7 daNm |
Diesel injection circuit
| designation | tightening torques |
|---|---|
| injector on the cylinder head | 9 ± 0.9 daNm |
| diesel fuel heater | 1.5 ± 0.1 daNm |
| injection pump | 2 ± 0.2 daNm |
| connector on diesel injector | 2.5 ± 0.2 daNm |
| the injection pump pulley | 2.3 ± 0.2 daNm |
Cooling system
| designation | tightening torques |
|---|---|
| coolant pump | 1.5 ± 0.2 daNm |
| water inlet housing | 1.8 ± 0.2 daNm |