ENGINE MECHANICAL 6A–49
Exhaust Valve
Standard: 0.06 – 0.10 mm (0.0024 – 0.0039 in)
Limit: 0.25 mm (0.010 in)
Measuring Method-II
1. Measure the valve stem outside diameter.
2. Use a caliper calibrator or a telescoping gauge to
measure the valve guide inside diameter.
3. Calculate the clearance between the valve guide
inside diameter and the valve stem outside diameter.
If the clearance exceeds the specified limit, the valve
and the valve guide must be replaced as a set.
Valve Stem Outside Diameter
Measure the valve stem diameter at three points.
If the measured value is less than the specified limit, the
valve and the valve guide must be replaced as a set.
Valve Stem Outside Diameter
Intake Valve
Standard: 7.95 – 7.96 mm (0.3130 – 0.3134 in)
Limit: 7.89 mm (0.3106 in)
Exhaust Valve
Standard 7.92 – 7.94 mm (0.3118 – 0.3126 in)
Limit: 7.89 mm (0.3106 in)
Valve Guide Replacement
Valve Guide Removal
Use a hammer and the valve guide replacer to drive the
valve guide from the cylinder head lower 5-8840-2623-0
face.
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