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

The +0.25mm sizing indicates that these bearings are slightly larger than standard size. They are designed to be used when the engine's crankshaft has been machined down by 0.25mm during a rebuild. This ensures the correct bearing clearance is achieved.

What is the advantage of a bimetal aluminum silicon base bearing?

A bimetal bearing with an aluminum silicon base offers a good combination of strength and conformability. This allows the bearing to support the crankshaft effectively while also being able to slightly conform to the crankshaft's surface for optimal contact and oil distribution.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for the Ford 232 (3.8L) engine during an overhaul. You receive the complete set needed for the job.

Specifications

Brand: King Engine Bearings
Part #: MB4052SI0.25
UPC: 611500419010

King Engine Bearings Ford 232 (3.8L) (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Ford 232 (3.8L) (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-232-3-8l-size-0-25mm-main-bearing-t14-770329
Price: 59.47 USD
Availability: BackOrder

$59.47

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Fits 1989-1995 Ford Thunderbird. King Engine Bearings Main Bearing Set, size +0.25mm, for the 3.8L engine. Essential for engine rebuilds.

Key Features

Fits 1989-1995 Ford Thunderbird and 1989-1990 Mercury Cougar.
Main bearing set for the Ford 232 (3.8L) engine.
Features a bimetal construction with an aluminum silicon base.
This set is sized +0.25mm, intended for use with a crankshaft ground to that dimension.
Essential component for engine rebuilding and overhaul projects.

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About this part

Product Details

Built with a bimetal aluminum silicon base, this main bearing set from King Engine Bearings is specifically sized at +0.25mm, making it a precise fit for your 1989-1995 Ford Thunderbird with the 232 (3.8L) engine. When you're rebuilding the heart of your engine, the main bearings are critical for supporting the crankshaft and ensuring smooth rotation. This set is designed to meet the demands of an engine rebuild, providing reliable support for the rotating assembly.

The bimetal construction, utilizing an aluminum silicon base, offers a good balance of strength and conformability. This means the bearings can adapt slightly to the crankshaft's surface while maintaining their structural integrity. Having the correct bearing clearance is key to oil flow and preventing metal-on-metal contact, which is why using the specified +0.25mm size is important for engines that have had their crankshaft ground to this dimension during a rebuild. This set is a well-built component for anyone undertaking a significant engine overhaul.