CYLINDER HEAD
Page 4A-18 90-857138R1 MAY 2000
Condition: Valve seat is too narrow and is located near the bottom edge of the valve face.
55802
Valve Seat Cutter Set Desired Results
Use
60°
Cutter, First
To center the seat and to increase
45°
Cutter
its width
Valves
1. Clean the carbon deposits from the valve. Discard any cracked, warped, or burned
valves.
2. Measure the valve stem diameter to check for wear. Replace valves if not within specifi-
cation.
55810
a
a-Valve Stem Diameter
Valve Stem Diameter
Standard Value Out of limit to use; replace valve
Intake Valve 0.216 in. (5.48 mm) 0.2145 in. (5.45 mm) or less
Exhaust Valve 0.214 in. (5.44 mm) 0.213 in. (5.41 mm) or less
3. Check the valve face for pitting. Valve faces that are pitted must be replaced or refaced.
NOTE: Several different types of equipment are available for refacing valves. Follow the
equipment manufacturer’s instructions.
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