King Engine Bearings Toyota 3K/4K/(Size +0.50mm) Main Bearing Set

This is a main bearing set from King Engine Bearings, specifically sized 0.50mm over for Toyota 3K and 4K engines. These bearings are crucial for the rotating assembly, supporting the crankshaft as it spins within the engine block. They are constructed with a bimetal design, meaning they have an aluminum base which helps with heat dissipation and compatibility with the crankshaft surface.

When rebuilding or repairing an engine, especially one with a few miles on it, replacing the main bearings is a common step. This set is designed to fit right into the specified Toyota Corolla models from 1968 to 1979, as well as Starlets from 1981 to 1984. The +0.50mm sizing indicates these are intended for use when the crankshaft journals have been machined down by 0.50mm to clean up wear or damage. It's important to ensure your crankshaft has been properly measured and machined to this specific size before installing these bearings.