TM 5-3810-307-24-2-2
If the lapped surface is at the top of the valve face, the
seat will require more grinding with the 15 degree
stone than with the 60 degree stone.
After centering the seat on the valve face, coat the
valve face with Dykem Steel BIue and allow to dry.
Apply a coat of valve lapping compound to the valve
and lap the valve to its companion seat.
Remove the valve and clean the lapping compound
from the valve face and seat.
2-20