What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are slightly larger than standard. They are intended for use when the crankshaft journals have been machined undersize by 0.25mm during an engine rebuild to ensure proper oil clearance.

What is the construction of these main bearings?

These main bearings feature a bimetal construction, which means they have an aluminum base. This type of bearing is known for its ability to handle the loads and heat generated within an engine's bottom end.

Are these bearings suitable for all 173 V6 engines?

This specific bearing set is designed for the 173 V6 engine found in a range of Buick, Chevrolet, Cadillac, GMC, Oldsmobile, and Pontiac vehicles from the early to mid-1980s. Always verify fitment for your specific vehicle model and year.

Specifications

Brand: King Engine Bearings
Part #: MB427AM1.25
UPC: 611500380372

King Engine Bearings Chevrolet 173 V6 (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Chevrolet 173 V6 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-173-v6-size-0-25mm-main-bear-t14-770389
Price: 43.43 USD
Availability: BackOrder

$43.43

On Backorder

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

King Engine Bearings Chevrolet 173 V6 (Size +0.25mm) Main Bearing Set. A well-built bimetal bearing set for engine rebuilds.

Key Features

Fits a wide range of Buick, Chevrolet, Cadillac, GMC, Oldsmobile, and Pontiac vehicles.
Main bearing set designed for Chevrolet 173 V6 engines.
Features a bimetal construction with an aluminum base for reliable performance.
This set is sized at +0.25mm, intended for use with machined crankshaft journals.
King Engine Bearings are a popular choice for engine rebuilding projects.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

If you're rebuilding the bottom end of your Chevrolet 173 V6 engine, getting the main bearings right is crucial for smooth operation and longevity. These main bearing sets from King Engine Bearings are built with a bimetal construction, meaning they have an aluminum base. This design helps them handle the loads and heat generated by the crankshaft.

This particular set is sized at +0.25mm, which is important if your crankshaft journals have been machined undersize during a rebuild. King is a well-known name in engine bearings, and these are a solid option for many GM vehicles from the early to mid-80s, including popular models like the Chevrolet Camaro, Buick Skylark, and Pontiac 6000. They are designed to fit right and perform reliably in your engine.

When you're putting an engine back together, using components like these main bearings ensures that the crankshaft is properly supported. This helps maintain correct oil clearances, which is key to preventing premature wear and ensuring your engine runs as it should.