What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are intended for a crankshaft that has been machined down by 0.50mm. This is a common practice during engine rebuilds when the original crankshaft journals have wear or damage and need to be resurfaced to a smaller diameter.

What is the advantage of bimetal aluminum base bearings?

Bimetal bearings with an aluminum base offer good conformability, allowing them to adapt to the crankshaft journal surface. This construction also provides a good balance of strength and wear resistance needed for the high-stress environment of the engine's main bearing journals.

Does this main bearing set include the necessary hardware for installation?

This product listing is for the main bearing set only. It includes the main bearings themselves. Any additional hardware, such as main bearing cap bolts or oil, would need to be sourced separately.

Specifications

Brand: King Engine Bearings
Part #: MB580AM1.5
UPC: 611500172861

King Engine Bearings Toyota 21R/(Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Toyota 21R/(Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-21r-size-0-50mm-main-bearing-se-t14-770988
Price: 50.69 USD
Availability: BackOrder

$50.69

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1975-1990 Toyota Pickup. King Engine Bearings main bearing set with aluminum base bimetal construction.

Key Features

Fits 1975-1990 Toyota Pickup, 1975-1983 Toyota Celica, 1975-1982 Toyota Corona, and 1984 Toyota 4Runner.
This is a main bearing set for Toyota 21R engines.
Features a bimetal construction with an aluminum base.
The set is sized +0.50mm, intended for use on a crankshaft machined to that specification.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

This main bearing set from King Engine Bearings includes the necessary components to replace the main bearings in your Toyota 21R engine. These bearings are built with a bimetal construction, featuring an aluminum base. This design is important for how the bearings handle the load and friction within the engine's rotating assembly.

King Engine Bearings uses an aluminum base bimetal construction for these main bearings. This type of bearing material is chosen for its ability to handle the high loads and speeds found in an engine's crankshaft main journals. The aluminum base offers good conformability, which helps the bearing adapt to any slight imperfections in the journal surface, while the bimetal layers provide the necessary strength and wear resistance. This set is specifically sized at +0.50mm, meaning it's intended for crankshafts that have been machined down by 0.50mm during an engine rebuild.