Cylinder Head/Valve
● Use a 55
cutter to make minor repairs on the
inside.
● Use a 45
cutter to make adjustment within the
level of prescribed width.
● Apply a light coating of prussian blue to the
valve seat. Gently strike the valve with a valve
guide reamer to check the status of contact,
without turning the valve.
● If the contact surface is too high, grind the
surface with a 37
cutter, and finish to the
prescribed width with a 45
cutter.
● If the contact surface is too low, grind the surface
with a 55
cutter, and finish to the prescribed
width with a 45
cutter.
9-10
55
○
45
○
37
○
55
○
Seat width
Too high
Too low
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