Crankshaft, Engine

CRANKSHAFT END PLAY





^ Move the crankshaft fully forward and backward and measure the clearance between the thrust bearings and crankshaft arm using suitable tool.
Standard: 0.10 - 0.26 mm (0.0039 - 0.0102 in)
Limit: 0.30 mm (0.0118 in)
^ If measured value exceeds the repair limit, replace the thrust bearings, and measure again. If it still exceeds the repair limit, replace crankshaft also.

OUT-OF-ROUND AND TAPER OF CRANKSHAFT





^ Measure dimensions at four different points as shown on each journal and pin.
^ Out-of-roundness is indicated by the difference in dimension between "X" and "Y" at "A" and "B".
^ Taper is indicated by the difference in dimension between "A" and "B" at "X" and "Y".
Limit
Out-of-round (Difference between "X" and "Y"): 0.002 mm (0.0001 in)
Taper (Difference between "A" and "B"): 0.002 mm (0.0001 in)
^ If measured value exceeds the standard, correct or replace crankshaft.
^ If corrected, measure the bearing oil clearance of the corrected journal or pin. Then select the main bearing or connecting rod bearing.

CRANKSHAFT RUNOUT





^ Place a V-block on a precise flat table to support the journals on both ends of the crankshaft.
^ Measure at No. 3 journal using suitable tool.
^ While rotating crankshaft, read the movement of the pointer.
^ Half of the movement shows the runout.
Limit: Less than 0.05 mm (0.002 in)
^ If measurement exceeds the limit, replace crankshaft.





CYLINDER BLOCK

Part 1:

Part 2:

CRANKSHAFT