Assigning Crankshaft Main Bearing Shells

Fig 1: Upper Main Bearing Identification

Courtesy of CHRYSLER GROUP, LLC

The upper main bearings can be identified by the four digit mark etched in the block (1) next to the oil pump.

Fig 2: Bearing Identification & Letters Stamped Into Crankshaft

Courtesy of CHRYSLER GROUP, LLC

The lower main bearings can be identified by the code etched on the front of the crankshaft counter weight (1). This color code indicates which bearing shell halves are to be used.