3-7. CYLINDER HEAD ASSEMBLY REPLACEMENT/REPAIR (CONT)
Grind valve seats for only a few
seconds to avoid making the seats
Grind integral valve seats.
Integral (parent metal) valve seats can be
ground once only. Valve seats that have
been previously ground are marked with
one X. If regrinding of X marked seats is
necessary, service seats must be
Install valves in their designated locations and measure valve depth G. Valve depth is the
distance from valve face to cylinder head surface.
Record depth G for each valve.
Lightly grind valve seats to proper
angle. Be careful not to remove too
much material and cause excessive
Reinstall valves in their designated
bores. Measure and record depth H.
Calculate grinding depth (GD) from
G and H measurements as follows:
GD = H - G
GD - 0.010 in. (0.25 mm)