Crankshaft, Engine

CRANKSHAFT END PLAY





^ Using a dial indicator, 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 limit, replace the 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 journal with a micrometer.
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 "CONNECTING ROD BEARING OIL CLEARANCE".

CRANKSHAFT PIN JOURNAL DIAMETER





^ Measure the outer diameter of crankshaft pin journal with a micrometer.
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 "CONNECTING ROD BEARING OIL CLEARANCE".

CRANKSHAFT OUT-OF-ROUND AND TAPER





^ Using a micrometer, measure the dimensions at four different points shown in the figure on each main journal and pin journal.
^ 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") 0.015 mm (0.0006 inch)
Taper (Difference between "A" and "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 main journal and/or pin journal. Then select main bearing and/or connecting rod bearing. Refer to "CONNECTING ROD BEARING OIL CLEARANCE" and/or "CONNECTING ROD BEARING OIL CLEARANCE".

CRANKSHAFT RUNOUT





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





CYLINDER BLOCK








CRANKSHAFT