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Measure the free length of the inner and outer valve
springs.
SERVICE LIMITS:
Inner 27.0mm / 1.063”
Outer 30.5mm / 1.201”
Inspect each valve for turning, burning, scratches,
or abnormal stem wear.
Check the valve movement in the guide.
Measure and record each valve stem O.D.
SERVICE LIMIT: 4.90 mm / 0.193”
Measure and record the valve guide I.D.
SERVICE LIMIT: IN / EX 5.30 mm / 0.209”
Calculate the stem-to-guide clearance.
SERVICE LIMIT: IN 0.08 mm / 0.003”
EX 0.10 mm / 0.00394”
NOTE:
If the stem-to-guide clearance exceeds the service limits, determine if a new guide with standard
dimensions would bring the clearance within tolerance. If so, replace guides as necessary and ream to fit.
If the valve guide is replaced, the valve seat must be refaced.
SPRING
SPRING
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