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ENG
INSPECTION AND REPAIR
NOTE:
All valve springs must be installed with the
larger pitch a upward as shown.
1 Outer spring
2 Inner spring
4.Check:
● Valve sealing
Leakage at valve seat → Reface, relap or
replace valve, relap.
Refer to “VALVE SEAT”.
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Valve seat checking steps:
●Pour a clean solvent 1 into the intake and
exhaust ports.
●Check the valve sealing, there should be
no leakage at the valve seat 2.
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Relapping steps:
●Reassemble head parts.
●Repeat lapping steps using fine lapping
compound.
●Clean all parts thoroughly.
●Reassemble and check for leakage again
using solvent.
●Repeat steps as often as necessary to
effect a satisfactory seal.
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CAM SHAFT
1.Inspect:
● Camshaft bushing 1
Wear/Damage → Replace.
4