7-12
CAUTION: NEVER ATTEMPT TO STRAIGHTEN A
BENT CRANKSHAFT.
Inspect the crankshaft oil galleys for blockage or
obstruction. (Illust. 7-32)
CAMSHAFTS
Check the camshaft bearing surfaces for wear using a
micrometer. Inspect the cam lobes for scoring or
excessive wear.
Specifications English Std. Metric
Camshaft Bearing Diameter .6235 15.836
.6240 15.849
Cylinder and Flange .6245 15.862
Camshaft Bearing Diameter .6255 15.887
7-32
MECHANICAL COMPRESSION RELEASE
The Mechanical Compression Release (MCR)
incorporates pins located in the camshaft. The pins
extend above the exhaust cam lobes, lifting the valve
and relieving engine compression for easier starting.
When the engine starts, centrifugal force moves the
weight outward and the pin will drop back down. The
engine will now run at full compression.
The components of the MCR except for the internal pins
are serviceable. When servicing the MCR be cautious
not to misplace the pins, as a new camshaft would be
necessary.
Clean the camshaft with solvent and dry all parts with
compressed air. Make sure that the pins, weight and
shaft of the mechanical compression release are
operating freely and smoothly. (Illust. 7-33)
7-33
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