What does '0.75mm undersize' mean for these bearings?

This means the bearings are designed for a crankshaft that has been machined down by 0.75mm. This is common when rebuilding an engine to correct for wear or damage on the original crankshaft journals.

What is the primary function of main bearings?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while maintaining precise alignment, which is critical for engine performance and longevity.

Does this set include everything needed for installation?

This set includes the main bearings themselves. You will need to ensure the crankshaft is properly machined and cleaned, and you may need additional assembly lubricants and sealants as recommended by the manufacturer's service manual.

Clevite Main Bearing Set MS1949A75MM - Nissan KA24DE/KA24E

Name: Clevite Nissan 4 2389cc 1989-95 KA24DE / KA24E Main Bearing Set
Brand: Clevite
SKU: clevite-clevite-nissan-4-2389cc-1989-95-ka24de-ka24e-main-bearing-set-t14-58150
Price: 25.54 USD
Availability: BackOrder

Clevite Nissan 4 2389cc 1989-95 KA24DE / KA24E Main Bearing Set

$25.54

On Backorder

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

Clevite Main Bearing Set MS1949A75MM for Nissan 240SX, Altima, Frontier and more. 0.75mm undersize.

Key Features

Fits 1989-1997 Nissan 240SX, 1993-2001 Nissan Altima, 1998-2003 Nissan Frontier, and other compatible Nissan models.
Designed for Nissan KA24DE and KA24E engines.
Main bearing set is 0.75mm undersize, intended for use with a machined crankshaft.
Features a multi-layer construction for durability and performance.
Supports proper crankshaft alignment and reduces friction within the engine.

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Will this fit your vehicle?

Product Details

If you're rebuilding the bottom end of your Nissan with a KA24DE or KA24E engine, this Clevite Main Bearing Set (MS1949A75MM) is a solid option. These bearings are designed to replace your worn-out main bearings, which are crucial for supporting the crankshaft and keeping it properly aligned within the engine block. This set is specifically sized at 0.75mm undersize, meaning it's intended for crankshafts that have been machined down to compensate for wear or damage.

Clevite is a well-known name in engine components, and these bearings are built to meet the demands of engine rebuilding. They feature a multi-layer construction with a steel backing for strength and a bearing material designed for good oil retention and wear resistance. Proper installation is key; ensure your crankshaft journals are clean and within the specified tolerance for these bearings to function correctly and last.

This set fits a range of Nissan vehicles from the late 80s through the early 2000s, including popular models like the 240SX, Altima, and Frontier. Make sure to verify fitment for your specific year and model.