Measurement Specifications

Main Bearing To Crankshaft Clearance Selective Fit
Desired 0.0008 - 0.0015 inch
Allowable 0.0008 - 0.0026 inch
Bearing wall thickness standard [1] 0.0957 - 0.0960 inch
Main Bearing Journal
Diameter 2.9994 - 3.0002 inch
Maximum out of round 0.0006 inch
Runout TIR maximum 0.002 inch
Allowable limit 0.005 inch
Taper maximum per inch 0.0005 inch
Main Bearing Thrust Face
Runout TIR maximum 0.001 inch
Finish RMS maximum 25 Front - 20 Rear
Main and Rod Bearing Journal Finish RMS Maximum 12
Thrust Bearing Journal Length 1.137 - 1.139 inch
Connecting Rod Journal
Diameter 2.3103 - 2.3111 inch
Maximum out-of-round 0.0006 inch
Taper per inch maximum 0.0006 inch
Crankshaft Free End Play 0.004 - 0.008 inch
Allowable limit 0.012 inch

[1] For 0.002 inch undersize add 0.001 inch to standard wall thickness.