D439E Service Manual 2. Engine Mechanical System (D439E)
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9. Measure the outer diameter of valve stem. If the
measurement is below the limit, replace the valve
stem.
Outer diameter of valve stem
- Intake valve
Reference : 8.96 ~ 8.97 mm
Limit : 8.85 mm
- Exhaust valve
Reference : 8.93 ~ 8.94 mm
Limit : 8.85 mm
10. Measure the inner diameter of valve guide and
outer diameter of valve stem. If the clearance
exceeds the limit, replace the valve guide.
Clearance between valve stem and valve guide
- Intake
Reference : 0.04 ~ 0.06 mm
Limit : 0.15 mm
- Exhaust
Reference : 0.07 ~ 0.10 mm
Limit : 0.2 mm
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