Main Bearing Fitting

PLASTIGAGE MEASUREMENT
1. Remove oil from journal and bearing shell.
2. Install crankshaft.





3. Cut plastigage to same length as width of the bearing and place it in parallel with the journal axis (Fig. 106).
4. Install the main bearing cap carefully and tighten the bolts to specified torque.

CAUTION: Do not rotate crankshaft or the plastigage will be smeared.

a. remove the bearing cap and measure the width of the plastigage at the widest part using the scale on the plastigage package (Fig. 106). If the clearance exceeds the specified limits, replace the main bearing(s) and if necessary, have the crankshaft machined to next undersize.