What is the main benefit of the bi-metal aluminum construction?

The bi-metal aluminum material provides a strong and durable bearing surface. It's designed to handle the loads and friction encountered in the engine's main journals, offering reliable performance for medium-load applications.

Are these bearings a standard size?

No, this specific set, part number MB5532SI030, is 0.030 inch undersize. This means they are intended for use with a crankshaft that has been machined down by 0.030 inches to ensure proper clearance and fit.

What does 'lead-free composite' mean for these bearings?

The lead-free composite is an environmentally safe material used in the bearing's construction. It helps to reduce harmful emissions while still providing the necessary wear resistance and performance characteristics for engine bearings.

Specifications

Brand: King Engine Bearings
Part #: MB5532SI030
UPC: 611500459436

King Engine Bearings Chevrolet 151/154 OE Replacement Main Bearing Set

Name: King Engine Bearings Chevrolet 151/154 OE Replacement Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-151-154-oe-replacement-main--t14-1003199
Price: 27.88 USD
Availability: BackOrder

$27.88

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King Engine Bearings Chevrolet 151/154 OE Replacement Main Bearing Set. Features lead-free composite and bi-metal aluminum for medium-load engines.

Key Features

Fits 47+ vehicle make/model combinations.
Features a lead-free environmentally safe composite.
Constructed with bi-metal aluminum material.
Designed for medium-load engines.
This is a 0.030 inch undersize bearing set.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

When you're rebuilding the bottom end of your engine, you need main bearings that are built to last. This set from King Engine Bearings is designed to meet OE specifications, ensuring a proper fit and reliable performance for a wide range of Chevrolet, GMC, and Pontiac vehicles. They are ideal for medium-load engines, offering a solid option for many common rebuilds.

King specializes in bearings, and this set uses a bi-metal aluminum material with a lead-free composite. This construction is environmentally safe and provides the durability needed for the main journals. The MB5532SI030 part number indicates these are 0.030 inch undersize bearings, which is important to note if you're machining your crankshaft.