3) Cam shaft
·Clearance between camshaft journal and camshaft bush
With an outside micrometer, measure the camshaft
journal diameter.
Measure the inside diameter of the camshaft bushing
on the cylinder block using a cylinder bore indicator,
and compare the measured value with the camshaft
outside diameter to determine the clearance.
<Clearance>
Replace the bushing if the measured value is beyond
the specified limit.
·Run-out
Support the camshaft on two V blocks and check for
run-out using a dial indicator. Correct or replace the
cam shaft if the amount of run-out is beyond the value
indicating need for servicing.
3.2.5 Crankshaft
1) Inspection of crankshaft
(1) Defect check
·By naked eyes, check for any scratch or damage on
the crankshaft journal and crank pin.
·By means of magnetic particle test and color check,
check the crankshaft for any crack and if found, replace it.
(2) Wear measuring
·With an outside micrometer measure the diameter of
the crankshaft journals and pins in the directions as
shown, and compare the measured values to
determine the amount of wear.
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