300Tdi Discovery
12
ENGINE
4
REPAIR
CYLINDER HEAD GASKETS - RENEW
Service repair no - 12.29.01
1. Drain cooling system.
See COOLING SYSTEM,
Adjustment, Coolant
2. Remove inlet manifold.
See FUEL SYSTEM,
Repair, Intake Manifold
3. Remove generator.
4. If fitted, remove compressor.
See AIR
CONDITIONING, Repair, Compressor
5. Remove rocker shafts.
See Rocker Shaft
Renew
6. Remove push rods.
7. Remove both exhaust manifolds.
See
MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust Manifold - V8i
8. Remove air cleaner assembly.
See FUEL
SYSTEM, Repair, Air Cleaner Assembly
9. Remove air flow sensor.
See FUEL SYSTEM,
Repair, Air Flow Sensor
10. Remove ground leads from rear of left hand
cylinder head
11. Right hand cylinder head - remove breather pipe
from lifting bracket.
12. Loosen cylinder head bolts, reversing tightening
sequence.
13. Remove cylinder heads.
14. Remove cylinder head gaskets.
15. Clean exhaust mating faces.
16. Clean head and block faces.
17. Fit new cylinder head gaskets, word TOP
uppermost. DO NOT use sealant.
18. Oil cylinder bores.
19. Clean threads of head bolts and lightly oil.
20. Locate cylinder heads on block.
21. Locate cylinder head bolts in position illustrated.
96 mm long bolts - 2, 4, 6, 7, 8, 9, 10
66 mm long bolts - 1, 3, 5
NOTE: There are no bolts fitted in the four
lower holes in each cylinder head.
NOTE: Left hand cylinder head illustrated,
arrow points to front of vehicle.
22. Tighten bolts progressively in sequence, shown
to
20 Nm then a further 180
° ±
5
°
23. Reverse removal procedure. 1 to 11.
