Crankshaft 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.
Crankshaft end play (Standard) 0.22-0.45 mm (0.0087-0.0177 in)
Crankshaft end play (Maximum) 0.55 mm (0.0216 in)
3. Remove the main bearing cap.
4. Measure the crankshaft runout.
- If it exceeds the specification, replace the crankshaft.
Crankshaft runout (Maximum) 0.05 mm (0.0019 in)
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 bearing size
STD: 51.980-52.000 mm (2.0464-2.0472 in)
USO.25: 51.730-51.750 mm (2.0366-2.0373 in)
Main journal out of round (Maximum) 0.05 mm (0.0019 in)
Crank pin journal diameter [LF]
STD: 46.980-47.000 mm (1.8497-1.8503 in)
USO.25: 46.730-46.750 mm (1.8398-1.8405 in)
Crank pin journal diameter [L3]
STD: 49.980-50.000 mm (1.9677-1.9685 in)
USO.25: 49.730-49.750 mm (1.9579-1.9586 in)
Crank pin out of round (Maximum) 0.05 mm (0.0019 in)
6. Install the main bearing caps and crankshaft.
7. Position a plastigage atop the journals in the axial direction.
8. Install the main bearing caps and cylinder block.
9. Remove the main bearing caps.
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.
Main journal oil clearance (Standard) 0.019-0.035 mm (0.0007-0.0013 in)
Main journal oil clearance (Maximum) 0.10 mm (0.0039 in)
Main bearing size
STD: 2.506-2.509 mm (0.0987-0.0988 In)
OSO.25: 2.628-2.634 mm (0.1034--0.1037 In)