Crankshaft: Testing and Inspection
CRANKSHAFT INSPECTION1. Install the main bearing cap.
2. Measure the crankshaft end play.
- If it exceeds the specification, replace the thrust bearing or crankshaft so that the specified end play is obtained.
Standard end play 0.22 - 0.45 mm {0.0087 - 0.0177 inch}
Maximum end play 0.55 mm {0.0216 inch}
3. Remove the main bearing cap.
4. Measure the crankshaft runout.
- If it exceeds the specification, replace the crankshaft.
Maximum runout 0.05 mm {0.0019 inch}
5. Measure the journal diameter in X and Y directions at the two points (A and B) as indicated in the figure.
- If it exceeds the specification, replace the crankshaft or grind the journal and install the undersize bearing.
Main journal (mm {inch})
Maximum out-of-round 0.05 mm {0.0019 inch}
Crank pin (mm (inch))
Maximum out-of-round 0.05 mm {0.0019 inch}
6. Install the main bearing caps and crankshaft.
7. Position a plastigauge atop the journals in the axial direction.
8. Install the main bearing caps and cylinder block.
9. Remove the main bearing cars.
10. Measure the main journal oil clearance.
- If it exceeds the specification, replace the main bearing using the main bearing selection table or grind the main journal and install the oversize bearings so that the specified oil clearance is obtained.
Standard clearance 0.019 - 0.035 mm {0.0007 - 0.0013 inch}
Maximum clearance 0.10 mm {0.0039 inch}