8. Inspect intake valve face and seat. If only minimal wear
is found, lap the valve face and seat as follows:
A. Obtain Valve Lapping Compound (see SECTION
9 - SPECIFICATIONS -Engine Fluid and Sealant
Specifications).
B. Apply lapping compound sparingly around the entire
valve face and valve seat.
C. Lightly lubricate the valve guide and valve stem with
clean engine oil.
D. From the bottom of the cylinder head, insert the
valve stem into the valve guide (A, Figure 111).
111
E. Push on bottom of valve until it contacts the valve
seat.
F. Obtain the Valve Lapping Tool (see SECTION 3 -
TROUBLESHOOTING - Special Tool List).
G. Attach suction cup at end of tool to valve head (B).
Holding shank of tool between the palms of both
hands, oscillate the tool approximately 20° back and
forth a few times.
94 vanguardpower.com
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