Crankshaft Inspection

Out-of-Round and Taper


1.Remove the crankshaft from the engine block.

2.Clean the crankshaft oil passages with pipe cleaners or a suitable brush.

3.Clean the keyway and threads.

4.Measure out-of round at the middle of each rod and main journal in two places. The difference between measurements on each journal must not be more than the service limit.

Journal Out-of-Round 
Standard (New): 0.005 mm (0.00020 in.) max. 
Service Limit: 0.006 mm (0.00023 in.) 

 

5.Measure taper at the edges of each rod and main journal. The difference between measurements on each journal must not be more than the service limit.

Journal Taper 
Standard (New): 0.005 mm (0.00020 in.) max. 
Service Limit: 0.006 mm (0.00023 in.) 

Straightness


6.Place the engine block on the surface plate.

7.Clean and install the bearings on the No. 1 and No. 5 journals of the engine block.

8.Lower the crankshaft into the engine block.

9.Measure runout on all main journals. Rotate the crankshaft two complete revolutions. The difference between measurements on each journal must not be more than the service limit.

Crankshaft Total Runout 
Standard (New): 0.03 mm (0.0012 in.) max. 
Service Limit: 0.03 mm (0.0012 in.)