Engine Block: Crankshaft: Inspection
NOTE:
Typical crankshaft journal measurements shown.
- Clean the oil off the bearing journals.
- Determine the maximum diameter of the journals with a micrometer. Measure at two locations 90° apart at each end of the journals.
- Compare the measured main bearing journal diameter to the crankshaft main bearing journal diameter grade marking chart Obtain the main bearing journal grade identification marks from the engine block and select the upper and lower main bearing sizes that will provide the proper oil clearance. Refer to BEARING(S), CRANKSHAFT, MAIN, STANDARD PROCEDURE .
- For connecting rod journals, verify that the diameter, maximum taper and maximum out of round are within specifications. Refer to TECHNICAL SPECIFICATIONS .
- For main bearing journals, verify that the maximum taper and maximum out of round are within specifications. Refer to TECHNICAL SPECIFICATIONS .