Crankshaft, Engine

CRANKSHAFT END PLAY





^ Using a dial gauge, measure the clearance between the thrust bearings and the crankshaft arm when crankshaft is moved fully forward or backward.
Standard: 0.10 - 0.25 mm (0.0039 - 0.0098 inch)
Limit: 0.30 mm (0.0118 inch)
^ If the measured value exceeds the repair limit, replace the thrust bearings, and measure again. If it still exceeds the repair limit, replace crankshaft also.

OUTER DIAMETER OF CRANKSHAFT JOURNAL
^ Measure the outer diameter of crankshaft journals.
Standard: 63.940 - 63.964 mm (2.5173 - 2.5183 inch)
^ If out of the standard, measure the main bearing oil clearance. Then use the undersize bearing. Refer to "OIL CLEARANCE OF MAIN BEARING".

OUTER DIAMETER OF CRANKSHAFT PIN





^ Measure the outer diameter of crankshaft pin.
Standard: 51.956 - 51.974 mm (2.0455 - 2.0462 inch)
^ If out of the standard, measure the connecting rod bearing oil clearance. Then use the undersize bearing. Refer to "OIL CLEARANCE OF CONNECTING ROD BEARING".

OUT-OF-ROUND AND TAPER OF CRANKSHAFT





^ Using a micrometer, measure the dimensions at 4 different points shown in the figure on each journal and pin.
^ Out-of-roundness is indicated by the difference in the dimension between X and Y at A and B.
^ Taper is indicated by the difference in the dimension between A and B at X and Y
Limit:
Out-of-round (X-Y): 0.015 mm (0.0006 inch)
Taper (A-B): 0.010 mm (0.0004 inch)
^ If the measured value exceeds the limit, correct or replace crankshaft.
^ If corrected, measure the bearing oil clearance of the corrected journal or pin. Then select main bearing or connecting rod bearing. Refer to "OIL CLEARANCE OF MAIN BEARING" or "OIL CLEARANCE OF CONNECTING ROD BEARING".

CRANKSHAFT RUNOUT





^ Place a V-block on a precise flat table to support the journals on the both end of crankshaft.
^ Place a dial gauge straight up on the No. 3 journal.
^ While rotating crankshaft, read the movement of the pointer on the dial gauge. (Total indicator reading)
Limit: 0.10 mm (0.0039 inch)
^ If it exceeds the limit, replace crankshaft.





Cylinder Block








CRANKSHAFT