114
Inspection and Maintenance
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Valve rod wear
Use a micrometer to measure the rod outside
diameter.
If the outside diameter is found to exceed the
specified value, replace the valve with a new one.
If the rod outside diameter is found to be within
the specified value, but the deflection is not within
the specified value, replace the valve guide with
a new one. After replacing the valve or guide,
check the deflection.
Tool Part Description:
Micrometer (0-25 mm)
DETAILS
Valve-rod outside diameter
Normal:
Inlet: 4.975-4.990 mm (0.1959 – 0.1965 in)
Exhaust: 4.955-4.970 mm (0.1951 – 0.1957 in)
Valve-guide maintenance
Use the valve-guide puller to remove the valve
guide towards the camshaft side.
Tool Part Description:
Valve-guide puller/fitter
NOTE:
Discard the valve guide.
Only oversize valve guides are available as spares.
Use the valve-guide reamer and shank to smooth
the valve-guide holes in the cylinder head.
Tool Part Description:
Valve-guide reamer (10.8 mm)
Tool Part Description:
Reamer shank
Oil the rod hole of each valve guide and use the
valve-guide puller/fitter and adaptor to drive the
guide into the hole.
Tool Part Description:
Valve-guide puller/fitter
Tool Part Description:
Valve-guide fitter adaptor
CAUTION!
Unless the valve-guide hole is oiled as
instructed prior to the fitting of the new guide,
the guide or the cylinder head may be
damaged.
Use the valve-guide reamer to smooth the guide
inner walls after the valve guides have been fitted.
Clean and oil the guides after smoothing them.
Tool Part Description:
Valve-guide reamer (5 mm)
Tool Part Description:
Reamer shank
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