Pontiac Workshop Service and Repair Manuals

Crankshaft Main Bearing: Specifications
Clearance Specifications

Crankshaft

Main Journal

Diameter All  .......................................................................................................................................................  67.241-67.265 mm (2.6473-2.6483 in.)
Taper  ...................................................................................................................................................................................  0.005 mm (0.0002 in.) Max.
Out of Round  .......................................................................................................................................................................  0.005 mm (0.0002 in.) Max.

Main Bearing Clearance  ..........................................................................................................................................  * 0.032-0.077 mm (0.0012-0.0030 in.)

Main Thrust Bearing Clearance  ..............................................................................................................................  * 0.032-0.077 mm (0.0016-0.0030 in.)

Crank Pin

Diameter  .............................................................................................................................................................  50.758-50.784 mm (1.9983-1.9994 in.)
Taper  ...................................................................................................................................................................................  0.005 mm (0.0002 in.) Max.
Out of Round  .......................................................................................................................................................................  0.005 mm (0.0002 in.) Max.

* Build Paper Clearance - distortion and wear not included