Inspection and Reconditioning (Rev 1/97)
56
Valve Spring Measurements
4. Inspect the valve stem caps, the valve spring retainers,
and the valve keepers. Replace any of these compo-
nents that show significant wear or damage.
Cylinder Head Assembly
Assemble the cylinder head after all the components have
been reconditioned or replaced. Thoroughly clean the cylin-
der head and all the components before assembly.
Installing Valve Stem Seals
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1. Lightly oil the valve stem seals and place them on the
valve guides.
NOTE: New valve stem seals should always be used
when assembling the cylinder head.
2. Oil the valve stem and place the valves in their respec-
tive valve seats. Oiling the valve stems prevents them
from seizing to the new valve stem seals.
3. Install the valve springs. The end of a valve spring that
has less pitch (this end is wound tighter and may have
some paint on it) should be placed on the cylinder head.
Valve Spring
4. Place the valve spring retainers in the valve springs and
compress the valve springs with a valve spring com-
pressor.
5. Install the valve keepers and remove the valve spring
compressor.
6. After installing the valves, place the cylinder head on
the intake side and fill the exhaust ports with diesel
fuel. Check to see if any diesel fuel is leaking past the
exhaust valves. Turn the cylinder head over and check
the intake valves in the same way. Minor seeping is
acceptable, but any valves that leak significantly must
be removed and lapped.
a.
To lap a valve place a small amount of medium grit
valve lapping compound on the valve face.
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