Service procedures - engine Group 21
30
Cylinder head, assembling
1
Oil the valve stems and fit the valves into their guides. Fit the
valve springs and the spring washers. Clamp the springs
with a valve spring compressor and fit the collets.
2
If the cylinder cleaning plugs have been removed, make sure
that the sealing surfaces are well cleaned. Fit new gaskets.
Torque the plugs.
IMPORTANT! The plugs must be tightened manually!
Plug diameter:
M30: 60 Nm (44.3 ft-lb).
3/4": 70 Nm (51.6 ft-lb).
Cylinder head, installation
Special tools: 999 2479, 998 9876, 115 8959
1
Use a brass wire brush to clean the sealing surfaces of
the cylinder block.
IMPORTANT! Take care not to scratch the contact surfaces
which seal against the cylinder liner.
2
Check the height of the cylinder liner above the face of the
block, see ”Cylinder liner with piston, fitting”.
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