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Group 21 Reconditioning
engine
Cylinder head,
reconditioning
E. Cylinder head, reconditioning
El
Remove all parts from cylinder head
Take care not to score/damage the mating surfaces.
Note! Do not interchange valve parts.
E2
Clean cylinder head and parts
Remove carbon deposits from the combustion cham-
bers and valves.
Clean valve seats with a grinder (to be able to see
cracks, damage, etc.).
Clean gasket mating surfaces.
Use a plastic scraper and if necessary a fine grade wet
abrasive paper.
Check all parts
Visible damage, wear, etc.
E3
E4
Check cylinder head for warp
Use a straight edge and feeler gauge.
Warp = max. 0.05 mm (0.002 in) per 100 mm (3.94
in
The cylinder head must not be machined but instead
replaced if the warp is too great.
46
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