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CAMSHAFT /VALVES AND VALVE SPRINGS
e. Apply a fine lapping compound to the valve
face and repeat the above steps.
f. After every lapping procedure, be sure to
clean off all of the lapping compound from
the valve face and valve seat.
g. Apply Mechanic’s blueing dye (Dykem)
b
onto the valve face.
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide and
onto the valve seat to make a clear impres-
sion.
j. Measure the valve seat width
c
again. If the
valve seat width is out of specification, reface
and lap the valve seat.
CHECKING THE VALVE SPRINGS
The following procedure applies to all of the
valve springs.
1. Measure:
valve spring free length
a
Out of specification Replace the valve
spring.
Valve spring free length (intake
and exhaust)
Inner spring
33.78 mm Limit: 32.5 mm
Outer spring
35.55 mm Limit: 34.0 mm
2. Measure:
compressed spring force
a
Out of specification Replace the valve
spring.
b
Installed length
Compressed spring force
Intake and exhaust inner
spring
52
64 Nm at 22.45 mm
Intake and exhaust outer
spring
105
129
Nm
at
25.45 mm
3. Measure:
valve spring tilt
a
Out of specification Replace the valve
spring.
Spring tilt limit
Intake and exhaust inner spring
1.3
/0.8 mm
Intake and exhaust outer spring
1.35
/0.8 mm
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