Engine Block: Crankshaft: Inspection: Inspection
WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Typical crankshaft journal measurements shown in illustration.
- 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 STANDARD PROCEDURE .
- For connecting rod journals, verify that the diameter, maximum taper and maximum out of round are within specifications. Refer to ENGINE SPECIFICATIONS .
- For main bearing journals, verify that the maximum taper and maximum out of round are within specifications. Refer to ENGINE SPECIFICATIONS .