Crankshaft, Engine

CRANKSHAFT RUNOUT
Limit on runout 0.06 mm (0.0023 inch)

Using a dial gauge, measure runout at center journal. Rotate crankshaft slowly. If runout exceeds its limit, replace crankshaft.





CRANKSHAFT THRUST PLAY
Measure this play with crankshaft set in cylinder block in the normal manner, that is, with thrust bearing and journal bearing caps installed.




Use a dial gauge to read displacement in axial (thrust) direction of crankshaft.




If its limit is exceeded, replace thrust bearing with new standard one or oversize one to obtain standard thrust play.




OUT-OF-ROUND AND TAPER (UNEVEN WEAR) OF JOURNALS
Limit on out-of-round and taper 0.01 mm (0.0004 inch)

An unevenly worn crankshaft journal shows up as a difference in diameter at a cross section or along its length (or both). This difference, if any, is determined by taking micrometer readings. If any one of journals is badly damaged or if amount of uneven wear in the sense explained above exceeds its limit, regrind or replace crankshaft.