What does the +0.75mm sizing mean for these main bearings?

The +0.75mm sizing indicates that these bearings are designed for a crankshaft that has been machined down by 0.75mm. This is typically done during an engine rebuild to correct wear or damage on the original crankshaft journals.

What is the construction of these King engine bearings?

These bearings feature a bimetal construction with an aluminum base. This type of bearing material is well-known for its good wear characteristics and ability to conform to the crankshaft, helping to maintain oil pressure and reduce friction.

Are these bearings a direct replacement for all KA24DE engines?

These bearings are specifically sized at +0.75mm, meaning they are not a direct replacement for a standard-sized crankshaft. You will need to confirm if your engine's crankshaft has been machined to this specific undersize before installation.

Specifications

Brand: King Engine Bearings
Part #: MB5245AM0.75
UPC: 611500302336

King 91-04 Nissan 146CI/2.4L KA24DE L4 / 89-97 146CI/2.4L KA24E L4 (Size +0.75) Main Bearing Set

Name: King 91-04 Nissan 146CI/2.4L KA24DE L4 / 89-97 146CI/2.4L KA24E L4 (Size +0.75) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-91-04-nissan-146ci-2-4l-ka24de-l4-89-97-146ci-2-4l-ka2-t14-284987
Price: 34.15 USD
Availability: BackOrder

$34.15

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King Engine Bearings main bearing set for Nissan 240SX, Altima, Frontier and more. Size +0.75.

Key Features

Fits 1989-1998 Nissan 240SX, 1993-2001 Nissan Altima, 1998-2004 Nissan Frontier, and many other Nissan models with KA24E or KA24DE 2.4L engines.
Main bearing set sized at +0.75mm for use with a machined crankshaft.
Constructed with a bimetal design featuring an aluminum base for durability and performance.
Supports the crankshaft within the engine block, crucial for smooth engine operation.
Designed for Datsun KA-24E (FL ON MAX) applications.

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About this part

Product Details

This package includes a set of main bearings from King Engine Bearings, specifically sized at +0.75mm. These bearings are built with a bimetal construction, featuring an aluminum base, which is a common and effective material for engine bearings. They are designed to fit a range of Nissan vehicles equipped with the KA24E or KA24DE 2.4L engines.

These main bearings are a crucial component for the bottom end of your engine, supporting the crankshaft and ensuring it spins smoothly within the engine block. The bimetal construction offers good wear resistance and conformability, helping to maintain oil film integrity under various operating conditions. The +0.75mm sizing indicates these are intended for an engine that has been machined to a larger diameter, often as part of a rebuild or repair process to correct wear or damage.

This set is suitable for models like the Nissan 240SX, Altima, and Frontier, among others. When rebuilding or repairing your engine, using correctly sized and well-built bearings like these from King is important for long-term engine health and performance.