Cylinder Head - Volvo Penta MD6A Workshop Manual

Cylinder head

29. Remove the valve tappets. NOTE! Carefully
machine clean the valve tappets where they
have been smoothed down (1) in order to serve
as a counterhold for
force out the valve tappets as this could damage
the block etc.
30. Remove the seals on the valve stems. Remove
the valve springs with the help of a valve spring
remover. Remove all the collets 1. Remove the
valves. IMPORTANT! Place the valves in the or-
der in which they are removed. Discard burnt
valves if the wear is excessive and grind valve
seats if necessary (See under Technical Data).
Seats and valves must be ground together so
that the contact surfaces will be absolutely tight.
t
he torque wrench. Do not
31. Replacing the valve guides.
With excessive clearance between the valve
stem and valve guide, the valve guide must be
replaced. (See under "Technical Data".) Press
out the valve guides with tool 884538.
32. Fit new valve guides with tool 884549. Use a
press.
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