Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power

6-78 Marine/Industrial 4.3L Engine
8. Use a suitable support to support the crankshaft on the front
and rear journals.
9. Use the J 7872 in order to measure the crankshaft journal
runout.
The crankshaft runout should not exceed 0.025 mm (0.0010
in).
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10. Measure the crankshaft end play.
Important: In order to properly measure the crankshaft end play,
the crankshaft, the crankshaft bearings and the crankshaft bearing
caps, the crankshaft bearing cap bolts must be installed into the
engine block and the bolts tightened to specifications.
Firmly thrust the crankshaft first rearward, then forward. This will
align the crankshaft rear bearings and the crankshaft thrust
surfaces.
10.1. With the crankshaft pushed forward, insert a feeler
gauge between the crankshaft and the crankshaft
bearing surface and then measure the clearance.
Refer to Engine Mechanical Specifications.
10.2. If the correct end play cannot be obtained, verify that
the correct size crankshaft bearing has been installed.
Refer to Engine Mechanical Specifications.
10.3. Inspect the crankshaft for binding. Turn the crankshaft
to check for binding. If the crankshaft does not turn
freely, then loosen the crankshaft bearing cap bolts,
one bearing cap at a time, until the tight crankshaft
bearing is located.
Burrs on the crankshaft bearing cap, foreign matter
between the crankshaft bearing and the engine block
or crankshaft bearing cap or a faulty crankshaft
bearing could cause a lack of clearance at the
crankshaft bearing.
2000 Marine/Industrial