Procedures

CYLINDER HEAD GASKETS - RENEW

1. Drain cooling system.
2. Remove intake manifold.
3. Remove generator.
4. Remove rocker shafts.
5. Remove push rods.
6. Remove power steering pump belt.
7. Remove generator bracket.
8. Remove both exhaust manifolds.
9. Remove air cleaner assembly.
10. Remove mass air flow sensor.
11. Remove ground leads from rear of left hand cylinder head.
12. Right hand cylinder head - remove breather pipe from lifting bracket.
13. Loosen cylinder head bolts, reversing tightening sequence.
14. Remove cylinder heads.
15. Remove cylinder head gaskets.


16. Clean exhaust mating faces.
17. Clean head and block faces.




18. Fit new cylinder head gaskets, word TOP uppermost. DO NOT use sealant.

CAUTION: Engines without suffix B have a steel gasket whilst engines with suffix B have a composite gasket. The two types of gasket are not interchangeable and it is essential to ensure that the correct type of gasket is fitted.

19. Oil cylinder bores.
20. Engine numbers without suffix B: Thoroughly clean threads of cylinder head bolts.

CAUTION: Cylinder head bolts fitted to engines without suffix B added to serial number are not interchangeable with those fitted to engines with suffix B added to serial number.

21. Install the cylinder heads on block.

Engine numbers without suffix B



22. Lightly oil threads of cylinder head bolts.
23. Fit cylinder head bolts:
Long bolts: 1, 3 and 5.
Medium bolts: 2, 4, 6, 7, 8, 9, and 10.
Short bolts: 11, 12, 13 and 14.
24. Using sequence shown, progressively tighten cylinder head bolts to:
Bolts 11 to 14 - Outer row - 60 Nm (44 ft lb)
Bolts 2, 4, 6, 8 and 10 - Centre row - 90 Nm (66 ft lb)
Bolts 1, 3, 5, 7 and 9 - Inner row - 90 Nm (66 ft lb)
25. When all bolts have been tightened, re-check for correct torque.

Engine numbers with suffix B



26. Lightly oil threads of new cylinder head bolts.
27. Fit cylinder head bolts:
Long bolts: 1, 3 and 5
Short bolts: 2, 4, 6, 7, 8, 9 and 10

Note: There are no bolts fitted in the four lower holes in each cylinder head.

28. Using sequence shown, tighten cylinder head bolts to:
Stage 1 - 20 Nm (15 ft lb)
Stage 2 - 90°
Stage 3 - Further 90°

CAUTION: Do not tighten bolts 180° in one operation.

All engines

29. Reverse removal procedure 12 to 1.