Bearing(S), Crankshaft, Main: Description: Description

The bottom of the cylinder block has provisions for mounting the bed plate and the oil jets. The bed plate houses the other half of the main bearing shell. The bed plate is made of cast iron and bolts to the cylinder block. There is twenty six M12 mounting bolts, and three M8 mounting bolts.

• The number four main bearing serves as the thrust washer location.
• The upper main bearings have a oil supply holes and center grooves for lubrication of the main journals. The lower main bearings provide strength where it is needed.
• The upper main bearings are available in three different thicknesses bearings. A color coded mark on the side of the bearing is used to identify it's thickness. Each color coded bearing is matched to it's respective journal. The select fit is obtained by matching the color coded bearings to grade identification marks on the cylinder block and crankshaft. Letters marked on the cylinder block identify the color of each upper-half main bearing, while letters marked on the front end of the crankshaft indicate the color of each lower half main bearing.