CYLINDER HEAD
90-857046R1 NOVEMBER 2001 Page 4A-35
Valve Seat Reconditioning
Clean the carbon deposits from the combustion chambers and valve seats and check for
pitting.
Several different types of equipment are available for reseating valve seats. Follow the
equipment manufacturer’s instructions.
Measure valve seat width (a). Resurface the valve seat if not in specification.
Reface valve seat, use a 60°, 45°, 15° valve seat cutter.
NOTE: When twisting cutter, keep an even downward pressure to prevent chatter marks.
a
Valve Seat Width Specification “a”
Intake Valve
0.035 - 0.043 in.
Exhaust Valve
.
.
.
(0.9 - 1.1 mm)
NOTE: If resurfacing the valve seats is required, resurface the valve seats to the specified
angles shown in chart following.
a
b
c
Valve Seat Angle Specifications
a 15°
b 45°
c 60°
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