Crankshaft Main Bearing: Service and Repair

STANDARD PROCEDURE - MAIN BEARING SELECTION

NOTE: There are three different possibilities for the upper main bearings and five different lower main bearings. The upper and lower bearing shells are not interchangeable.




The lower main bearing identification (2) is stamped in the nose of the crankshaft (3). There are 5 different bearing sizes available 0 through 4.









The upper main bearing shell identification (1) is located in the middle of cylinder block on the right side of the engine. There are three different size bearings available. The bearing class is read downward from top and corresponds to the front journal to the rear journal on the bottom.

UPPER MAIN BEARING SELECTION