CYLINDER HEAD ASSEMBLY - REPLACE/REPAIR (Contd)
If GD is greater than 0.010 inch, a service valve seat must be
With valves in their designated bores, measure and record depth I.
I Depth: 0.039 - 0.060 inch
If depth I exceeds tolerance limits, replace the valve and check
depth I again.
Apply a light coat of valve lapping compound to each valve and lap
each valve to its companion seat.
Remove valves and clean grinding compound from valves and
Measure valve seat width.
Valve Seat Width Range Limits
Point J: 0.060 inch
Point K: 0.080 inch
If valve seat is too wide after lapping, grind lower seat surface L
using a 600 seat grinder, and upper seat surface M with a 150 seat
grinder until seat width is centered and within specifications listed in
step k above.
If it was necessary to install service valve guides, STEP 3,install the service
guides before installing the service seats.