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ENG
VALVES AND VALVE SPRINGS
1. Measure:
• valve-stem-to-valve-guide clearance
Out of specification → Replace the valve
guide.
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter
a
–
Valve stem diameter
b
Valve-stem-to-valve-guide clear-
ance
Intake
0.010 ~ 0.037 mm
<Limit>: 0.08 mm
Exhaust
0.025 ~ 0.052 mm
<Limit>: 0.1 mm
2. Replace:
• valve guide
NOTE:
@
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 °C in an oven.
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a. Remove the valve guide with the valve
guide remover 1.
b. Install the new valve guide with the valve
guide installer 2 and valve guide remover
1.
c. After installing the valve guide, bore the
valve guide with the valve guide reamer 3
to obtain the proper valve-stem-to-valve-
guide clearance.
NOTE:
@
After replacing the valve guide, reface the
valve seat.
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Valve guide remover (5 mm)
90890-04097
Valve guide installer (5 mm)
90890-04098
Valve guide reamer (5 mm)
90890-04099