Crank Pins & Connecting Rod Bearings Inspection: Notes

Inspect crank pin for uneven wear or damage. Measure crank pin for out-of-round or taper with a micrometer. If crank pin is damaged, or out-of-round or taper is out of limit, replace crankshaft or regrind crank pin then inspect rod bearing clearance referring to CONNECTING ROD BEARING CLEARANCE  .

Fig 1: Connecting Rod Bearing & Crank Pin Diameter Chart

Courtesy of SUZUKI OF AMERICA CORP.

Crank pin out-of-round (a - b) 

Limit:  0.01 mm (0.0004 in.)

Crank pin taper (c - d) 

Limit:  0.01 mm (0.0004 in.)

Fig 2: Measuring Crank Pin For Out-Of-Round Or Taper

Courtesy of SUZUKI OF AMERICA CORP.