Fitting Bearings
MAIN BEARING JOURNAL MEASUREMENTFigure 14:
Measure the journal outside diameter (Fig. 14). If the clearance exceeds the specifications limit. Replace the main bearing(s) and if necessary replace the crankshaft.
Crankshaft Specification Chart
PLASTIGAGE MEASUREMENT
1. Remove oil from journal and bearing shell.
2. Install crankshaft.
Figure 15:
3. Cut plastigage to same length as width of the bearing and place it in parallel with the journal axis (Fig. 15).
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.
Figure 16:
5. Carefully remove the bearing cap and measure the width of the plastigage at the widest part using the scale on the plastigage package (Fig. 16). Refer to Crankshaft Specification Chart for proper clearance. Also see Measuring Main and Connecting Rod Bearing Clearances in Engine, Service and Repair, Standard Service Procedures.