The bearings of an engine make up an important group of parts.
Some bearings remain stationary in performing their functions, while others move.
The primary function of bearings is to support rotating shafts and other moving parts, and to transmit loads from one engine part to another. One group of stationary bearings serves to support the crankshaft. These bearings are Figure 3-8. Upper and lower main bearing shells, bearing caps, and rear main bearing thrust washers. Additional information on bearings is given in chapter 4 of this rate training manual.