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Valve Spring Free Length Specification
Standard
Service Limit
1.535” (39 mm)
1.476” (37.5 mm)
Valve Seat Width Inspection
Remove carbon deposits from the combustion
chamber. Inspect the valve seats for pitting or
other damage.
Standard
Service Limit
0.03149 -
0.0393”
(0.8-1.0 mm)
0.0591”
(1.5 mm)
Cylinder Head Warp Inspection
- Remove carbon deposits from the combustion
chamber.
- Clean off any gasket material from the
cylinder head surface.
- Check the spark plug hole and valve areas for cracks.
- Check the cylinder head for warpage with a straight
edge and a feeler gauge as shown.
Service Limit
0.00393” (0.10 mm)
STRAIGHT EDGE
FEELER GAUGE
3
