outside diameters of crankshaft journals to determine
the oil clearance.
Connecting rod bearing clearance
Install the connecting rod bearing in the connecting
rod bearing cap, tighten the connecting rod cap bolts
to the specified torque, then measure the inside
diameter.
Compare the two values obtained through
measurement of connecting rod bearing inside
diameter with the outside diameters of crankshaft pins
to determine the oil clearance.
If the clearance deviates from the specified range,
have the crankshaft journals and pins ground and install
undersize bearings.
(3) Oil clearance between crankshaft and bearing
(Method 2: plastic gauge)
Assemble the crankshaft on the cylinder block and put
plastic gauge on the journal and pin of crankshaft and
then after assembling bearing cap, tighten the bolts at
the specific torque. Again after disassembling the
bearing cap by removing the bolts, take out the flatted
plastic gauge and measure the width of plastic gauge by
means of plastic gauge measuring scale. This is the oil
clearance.
The oil clearance too can be measured in the same
manner
5ton Diesel Engine SPC000006
Page 57
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