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 rod journal diameter to the crankshaft connecting rod bearing journal diameter grade marking chart. Refer to ROD, PISTON AND CONNECTING . Select the bearing size that corresponds to the crankshaft markings for each rod bearing journal that will provide the proper oil clearance.
- Compare the measured main bearing journal diameter to the crankshaft main bearing journal diameter grade marking chart. Refer to BEARING(S), CRANKSHAFT, MAIN . 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.
- For connecting rod journals, verify that the maximum taper and maximum out of round are within specifications. Refer to SPECIFICATIONS .
- For main bearing journals, verify that the maximum taper and maximum out of round are within specifications. Refer to SPECIFICATIONS .