What do you call the bearings between the crankshaft and the block?
What do you call the bearings between the crankshaft and the block? In a piston engine, the main bearings are the bearings which hold the crankshaft in place and allow it to rotate within the engine block. Main bearings are usually plain bearings or journal bearings, held in place by the engine block and bearing caps. Why is bearing clearance necessary with a crankshaft? In other words, in a generally stock engine rebuilt to stock specifications, the journals and/or the backs of the rods or mains may not be perfectly round. Extra bearing clearance helps ensure everything keeps rotating as...