Procedure
Lightly lubricate valve stem. Apply fine-grained grinding paste
to valve head.
Insert valve in valve guide. Turn valve evenly while lifting
valve grinder with valve rhythmically from seat until the grinding
paste is evenly distributed.
Inspect
Remove valve from cylinder head. Clean valve seat and check
contact pattern on valve head and cylinder head. The grinding
procedure is concluded when the seat surfaces are of a uniformly
matt colouring.
The bearing surface can be checked by marking the valve cone
with chalk lines. Insert the valve in the valve guide and turn back
and forth. The chalk marking must smudge evenly.
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