Checking The Valve Springs - Orion AGB-21G Service Manual

CAMSHAFT /VALVES AND VALVE SPRINGS
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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
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
spring.
b Installed length
Compressed spring force
Intake and exhaust inner
spring
52
Intake and exhaust outer
spring
105
3. Measure:
valve spring tilt a
Out of specification
spring.
Spring tilt limit
Intake and exhaust inner spring
1.3 /0.8 mm
Intake and exhaust outer spring
1.35 /0.8 mm
Replace the valve
Replace the valve
64 Nm at 22.45 mm
129 Nm at 25.45 mm
Replace the valve