Crankshaft Main Bearing: Application and ID

CAUTION: If the codes are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or driver. Clean them only with washing oil or detergent.

Crank Bore Code Location:

Typical Main Bearing Design:

Bearing Code Chart:

CRANK BORE CODE LOCATION (NUMBERS, LETTERS OR BARS)
Numbers or letters or bars have been stamped on the end of the block as a code for the size of each of the 5 main journal bores. Use them, and the numbers stamped on the crank (codes for main journal size), to choose the correct bearings.

Main Journal Code Locations:

Main Journal Code Locations:

MAIN JOURNAL CODE LOCATIONS (NUMBERS OR BARS)
The main journal codes are stamped in one of the following locations.