POWR
Power unit
5-25
6C13G11
3. Measure the valve stem diameter
b
.
Replace if out of specification.
4. Measure the valve stem runout. Replace
if above specification.
Checking the valve guides
NOTE:
Before checking the valve guide make sure
that the valve stem diameter is within specifi-
cation.
1. Measure the valve guide inside diameter
a
.
2. Calculate the valve stem-to-valve guide
clearance as follows. Replace the valve
guide if out of specification.
Replacing the valve guides
1. Remove the valve guide
1
by striking
the special service tool from the combus-
tion chamber end.
2. Install a new valve guide by striking the
special service tool from the camshaft
end.
Valve stem diameter
b
:
Intake:
5.475–5.490 mm
(0.2156–0.2161 in)
Exhaust:
5.460–5.475 mm
(0.2150–0.2156 in)
Valve stem runout limit:
Intake: 0.05 mm (0.0020 in)
Exhaust: 0.03 mm (0.0012 in)
Valve guide inside diameter
a
:
Intake and exhaust:
5.500–5.512 mm
(0.2165–0.2170 in)
Valve stem-to-valve guide clearance
= valve guide inside diameter – valve
stem diameter:
Intake and exhaust:
0.025–0.052 mm
(0.0010–0.0020 in)
Valve guide remover/installer:
90890-06801
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