Crankshaft

Crankshaft Main Bearing Journal Diameter
1. Measure each of the crankshaft main bearing journal diameters in at least 2 directions.





Crankshaft Main Bearing Journal Taper and Out-of-Round
1. Measure each of the crankshaft main bearing journal diameters in at least 2 directions at each end of the main bearing journal.





Crankshaft Main Bearing Journal-to-Bearing Clearance

NOTE: Crankshaft main bearing journals must be within specifications before checking journal clearance.

1. Remove the crankshaft main bearing caps and crankshaft main bearing.
2. Lay a piece of Plastigage(R) across the face of each crankshaft main bearing surface.





3. NOTE: Do not turn the crankshaft while carrying out this procedure.

Install and remove the crankshaft main bearing cap.
4. Verify the crankshaft journal clearance.





Crankshaft End Play





1. Using the Dial Indicator Gauge, measure the crankshaft end play.
2. Position the crankshaft to the rear of the cylinder block.
3. Zero the indicator.
4. Move the crankshaft to the front of the cylinder block. Note and record the crankshaft end play.





Crankshaft Runout





1. NOTE: Crankshaft main bearing journals must be within specifications before checking runout.

Use the Dial Indicator Gauge to measure the crankshaft runout.
^ Rotate the crankshaft and subtract the lowest dial indicator reading from the highest dial indicator reading to figure the crankshaft runout.





Connecting Rod Bearing Journal Taper and Out-of-Round
1. Measure the crankshaft connecting rod journal diameters in 2 directions perpendicular to one another at each end of the connecting rod journal. The difference in the measurements from one end to the other is the taper. Verify measurement is within the wear limit.





Connecting Rod-to-Piston Clearance
1. Measure the clearance between the connecting rod and the piston. Verify the measurement is within specification.