Crankshaft Main Bearing: Testing and Inspection

CRANKSHAFT PIN OIL CLEARANCE (PLASTIGAGE METHOD)
1. Remove any oil from crankshaft pin and connecting rod bearing.
2. Cut the Plastigage to the same length as the width of bearing and place it on crankshaft pin in parallel with its axis.
3. Install the connecting rod cap carefully and tighten the nuts to specified torque.
4. Carefully remove the connecting rod cap.





5. Measure the width of the Plastigage at its widest part by using the scale printed on the Plastigage package.
Standard value: 0.02 - 0.05 mm (0.0008 - 0.0020 inch).
Limit: 0.1 mm (0.004 inch).

CRANKSHAFT MAIN JOURNAL OIL CLEARANCE (PLASTIGAGE METHOD)
1. Remove oil from the crankshaft journal and crankshaft bearing.
2. Install the crankshaft.





3. Cut the Plastigage to the same length as the width of bearing and place it on journal in parallel with its axis.
4. Install the crankshaft bearing cap carefully and tighten the bolts to the specified torque.
5. Carefully remove the crankshaft bearing cap.





6. Measure the width of the Plastigage at its widest part by using a scale printed on the Plastigage package.
Standard value: 0.02 - 0.04 mm (0.0008 - 0.0016 inch).
Limit: 0.1 mm (0.004 inch).