Large thickness of the lining is a very important feature of bi-metal bearings. In the case of a bi-metal bearing, theīacking has an aluminum bonding layer applied followed by a soft bearingĪccording to King Engine Bearings, “the second layer in a bi-metal bearing is the lining. Next comes a nickelīarrier followed by a soft overlay. Heat-conductive copper is plated onto the metal backing.

This provides the foundationįor the bearing, and maintains the shape and press-fit of the insert under Bearings areĭesigned with a rigid metal or aluminum backing. The top of the bearing insert is typically smooth and flat. The main bearingsand rod bearings are two-piece affairs while the cam bearings are typically one-piece in design.īetween the bearing surface and a spinning crank or cam journal.

While some race applications make use of a roller bearing for the camshaft (an expensive and somewhat complicated arrangement) the most common high performance bearings are bi-metal or tri-metal insert jobs.

It should be no secret to anyone reading this that bearings are used for the camshaft along with the crankshaft main and rod journals in an automotive application.

King ls1 cam bearings