Crankshaft

Crankshaft Main Bearing Journal Clearance

Special Tools:

Special Tool(s)

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 Pasturage 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.
^ If out of specification, install new components as necessary.

Crankshaft Main Bearing Journal Diameter





1. Measure each of the crankshaft main bearing journal diameters in at least two directions.
^ If out of specification, install new components as necessary.

Crankshaft Main Bearing Journal Taper





1. Measure each of the crankshaft main bearing journal diameters in at least two directions at each end of the main bearing journal.
^ If out of specification, install new components as necessary.

Crankshaft End Play





Special Tool(s)

1. Measure the crankshaft end play. Use a Dial Indicator Gauge with Holding Fixture to measure 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.
^ If crankshaft end play exceeds specifications, install a new crankshaft thrust washer or crankshaft thrust main bearing.

Crankshaft Run out





Special Tool(s)





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

Use the Dial Indicator Gauge with Holding Fixture to measure the crankshaft run out.
^ Rotate the crankshaft and subtract the lowest dial indicator reading from the highest dial indicator reading to figure the crankshaft run out. If it is out of specification, install new components as necessary.

Crankshaft Connecting Rod Journal Diameter





1. Measure each of the crankshaft connecting rod journal diameters in at least two directions, at each end of the journal.
^ The difference in the measurements from one end to the other is the taper.
^ The difference in measurements perpendicular to each other is the out of round.
2. If the diameter, taper, or out of round measurement is out of specification, install new parts as necessary.

Crankshaft - Connecting Rod Journal Taper, Out of Round





1. Measure the crankshaft connecting rod journal diameters in two 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. The difference in the measurements perpendicular to each other is the out of round. Verify the measurements are within the wear limit.
^ If either measurement is out of specification, install new components as necessary.