Arrangement of seals and reinforcing plates of the cylinder head cover with a gasket contact surface width of 5.5 mm
A, B - reinforced plate, C - seal
Arrangement of seals and reinforcing plates of the cylinder head cover with a gasket contact surface width of 8 mm
A, B, D - reinforced plate, C - seal
Identification of cylinder head bolts
A - Torx T55 bolt, B - bolt with an internal dodecagonal asterisk
Since September 1983 (production date code "DJ") all engines are equipped with a cylinder head with increased (from 5.5 mm to 8 mm) the width of the contact surface of the cylinder head cover gasket.
Since April 1984, Torx T55 type cylinder head bolts have been used with a head with an internal hexagonal sprocket. The order of their tightening has not changed.
In the event of oil leakage from under the cylinder head cover in a car manufactured before September 1983 with a 5.5 mm gasket surface, proceed as follows.
1. Remove the cylinder head cover and level the damaged or deformed surface of the head cover support.
2. Install the cylinder head cover with a new type of gasket and six additional seals.
3. Replace corner plates (Grower type) four reinforced plates.
If the gasket contact surface in the cylinder head cover cannot be restored to normal, proceed as follows.
1. Install the following new type parts: cylinder head cover and gasket, and toothed belt guard.
2. Replace corner plates (Grower type) four reinforced plates and install six additional seals.
If it is necessary to replace the cylinder head cover gasket in a vehicle manufactured after September 1983, proceed as follows.
1. Install reinforced plates.
2. Tighten the cylinder head cover bolts to 5–8 Nm.
Tightening torques for cylinder head bolts with Torx T55 socket
| 1st stage | 35 – 40 Nm |
| 2nd stage | 70 – 75 Nm |
| 3rd stage (after 5 minutes) | tighten 90 |
Attention! Torx T55 cylinder head bolts are single use bolts. Be sure to use new Torx socket bolts every time to mount the cylinder head. Torx socket bolts must not be tightened when the engine is warm. VALVES
ONS engine valve sizes 1.6 in3 LSD and 1.8 in3 REB
| Engine | 1.6 dm3LSD | 1.8 in.3 REB |
| Inlet valve: | ||
| - length (mm) | 112,55 | 111,75 – 112,75 |
| - plate diameter (mm) | 41,80 – 42,20 | 41,80 – 42,20 |
| Exhaust valve: | ||
| - length (mm) | 112,55 | 111,15 – 112,15 |
| - plate diameter (mm) | 34,00 – 34,40 | 34,00 – 34,40 |
Valve travel
| Engine 1.6 dm3LSD | 9.5mm |
| Engine 1.8 in.3 REB | 10.1 mm |
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