TM 5-3810-307-24-2-2
Calculate grinding depth (GD) as follows:
GD = (B) - (A)
Seat Grinding Depth Limit
GD: 0.254 mm [0.010 inch]
Service valve seats are available for over the limit seats.
Confirm that the valve depth after grind (B) is still within
the original specification.
Valve Depth (A) or (B)
mm
in
0.99
MIN
0.039
1.52
MAX
0.060
Mark the cylinder head with an (X) to identify each re-
ground valve seat.
Apply a light coat of valve lapping compound to each
valve and lap each valve to its companion seat.
2-18