300Tdi Discovery Cylinder Head Gasket Repair: Mpi Engine - Page 262
Mpi
17
REPAIR
22. Raise vehicle
23. Remove 4 nuts securing downpipe to exhaust
manifold.
24. Release downpipe from exhaust manifold.
25. Collect gasket.
26. Release 4 screws and remove spark plug cover.
27. Release spark plug leads from spark plugs and
release from clips. Place aside.
28. Remove camshaft covers.
29. Remove timing belt.
See Camshaft Front Oil
Seal
30. Progressively loosen and remove 10 cylinder
head bolts in sequence shown.
31. Remove cylinder head complete with manifold,
place on blocks to prevent damage.
32. Remove and discard cylinder head gasket.
33. Remove location dowels from cylinder block.
34. Inspect cylinder head for damage, cracks and
burning.
35. Inspect cylinder block. Ensure that the oil
restrictor is clear and fitted below the block face.
36. Clean all traces of gasket material from head
and block mating faces, using release agent and
plastic scraper.
37. Check cylinder head and block faces for
warpage:
Longitudinal warp = 0.1 mm max.
Transverse warp = 0.1 mm max.
Diagonal warp = 0.1 mm max.
38. Decarbonize cylinder head and pistons if
necessary.
39. Clean cylinder head bolt threads with a wire
brush, check for damage, replace if necessary.
40. Check cylinder block threads by running bolts
into threads using fingers only. Clean any tight
threads using M11 x 1.5 mm tap. Remove all
traces of oil from bolt holes.