CYLINDER HEAD ASSEMBLY - REPLACE/REPAIR (Contd)
Apply a light coat of valve lapping compound to each
valve and lap valve to its companion service seat.
Remove valves from cylinder head and clean grinding
compound from valves and service seats.
Measure width of service seats.
Valve Service Seat Width Range Limits
Minimum J: 0.060 inch
Maximum K: 0.080 inch
If service 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 h
Stamp two Xs on side of cylinder head in line with
pocket with service seat.
MACHINE PARENT METAL EXHAUST VALVE SEAT
POCKETS AND INSTALL EXHAUST
Valve seats marked with one X at side of cylinder head have
been ground once and if regrinding is necessary, install service
Machine parent metal intake valve seat pocket to the
N = 0.3157 - 0.3165 in.
P = 0.015 in. radius max.
Q = 0.3975 - 0.4055 in.
R = 1.7180 - 1.7190 in. dia.
S = 1.7489 - 1.7589 in. dia.
T = 0.1379 - 0.1479 in.
U = 0.0157 in. radius max.
V = 128 micro inch surface finish