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Valve and valve guide bush
１. Inspect the valve seat width. If not in the prescribed range, repair the valve seat.
Valve seat width: 0.6～0.8mm
2. Inspect the valve margin thickness (T). If not as in the prescribed
value, replace the valve.
The margin thickness of valve: 0.5～0.9mm
T
3. Inspect the valve stem diameter. If not in the prescribed range,
replace the valve.
The diameter of valve stem:
Intake valve: 5.475～5.490mm
Exhaust valve: 5.460～5.475mm
4. Measure the valve stem run out. If exceeding the
limit, replace the valve.
Valve stem run out limit: 0.01mm
5. Measure the inside diameter of the valve guide bush.
The inside diameter of the valve guide bush: 5.500～5.512mm
CAUTION:
When replacing the valve, use a new valve guide bush and valve oil seal.
Valve spring
1. Measure the free length of valve spring. If less than prescribed value, replace.
The minimum free length: 32.68mm
2. Measure the valve spring tilt. If exceeding the prescribed limit, replace.
The maximum tilt limit: 1.5mm
Valve rocker arm and rocker shaft
1. Check the interface between the valve rocker arm and rocker shaft for wear. Replace if necessary.
2. Measure whether the inside diameter of valve rocker arm and outside diameter of rocker shaft are
within prescribed value.
The inside diameter of valve rocker arm: 13.000～13.018mm
The outside diameter of rocker shaft: 12.941～12.951 mm
Camshaft
1. Check the camshaft size.
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