Crankshaft, Engine

CRANKSHAFT END PLAY





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

CRANKSHAFT MAIN JOURNAL DIAMETER
^ Measure the outer diameter of crankshaft main journals with micrometer.
Standard: 59.951 - 59.975 mm (2.3603 - 2.3612 inch) dia.
^ If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to "MAIN BEARING OIL CLEARANCE".

CRANKSHAFT PIN JOURNAL DIAMETER





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

CRANKSHAFT OUT-OF-ROUND AND TAPER





^ Measure the dimensions at four different points as shown in the figure on each main journal and pin journal with micrometer.
^ Out-of-round is indicated by the difference in the dimensions between "X" and "Y" at "A" and "B".
^ Taper is indicated by the difference in the dimensions between "A" and "B" at "X" and "Y".
Limit:
Out-of-round (Difference between "X" and "Y"): 0.002 mm (0.0001 inch)
Taper (Difference between "A" and "B"): 0.002 mm (0.0001 inch)
^ If the measured value exceeds the limit, correct or replace crankshaft.
^ If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then select the main bearing and/or connecting rod bearing. Refer to "MAIN BEARING OIL CLEARANCE" and/or "CONNECTING ROD BEARING OIL CLEARANCE".

CRANKSHAFT RUNOUT





^ Place V-block on precise flat table, and support the journals on the both end of crankshaft.
^ Place dial indicator straight up on the No. 3 journal.
^ While rotating crankshaft, read the movement of the pointer on dial indicator. (Total indicator reading)
Standard: Less than 0.05 mm (0.002 inch)
Limit: 0.10 mm (0.0039 inch)
^ If it exceeds the limit, replace crankshaft.





CRANKSHAFT