What does 0.75mm undersize mean for these bearings?

This means the bearings are manufactured to be 0.75mm smaller in diameter than a standard (STD) size bearing. This is typically used when the crankshaft journals have been machined down by 0.75mm to remove wear or damage.

What is the benefit of a bimetal bearing with an aluminum base?

Bimetal bearings use multiple layers of materials to optimize performance. The aluminum base offers good embeddability, allowing the bearing to conform to the crankshaft surface, while other layers provide strength and wear resistance for durability.

Does this set include all the main bearings needed for an L28 engine?

This is a main bearing set, which typically includes all the necessary main bearings for the L28 engine. It's always a good idea to verify the exact contents against the manufacturer's packaging upon receipt.

Specifications

Brand: King Engine Bearings
Part #: MB7732AM0.75
UPC: 611500240430

King Engine Bearings Datsun L28 (Size +0.75) Main Bearing Set

Name: King Engine Bearings Datsun L28 (Size +0.75) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-datsun-l28-size-0-75-main-bearing-set-t14-498359
Price: 85.80 USD
Availability: BackOrder

$85.80

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Fits 1977-1981 Nissan 810. King Engine Bearings main bearing set, 0.75mm undersize. Essential for engine rebuilds.

Key Features

Fits 1977-1981 Nissan 810, 1970-1973 Nissan 240Z, 1974-1975 Nissan 260Z, 1981-1983 Nissan 280ZX, and 1981-1984 Nissan Maxima.
Main bearing set for the Datsun L28 engine.
Bearings are 0.75mm undersize, suitable for machined crankshaft journals.
Constructed with a bimetal design featuring an aluminum base.
Designed for smooth operation and engine longevity.

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About this part

Product Details

Built with an aluminum base, these main bearings from King Engine Bearings are a solid option for your Datsun L28 engine rebuild. They are specifically sized at 0.75mm undersize, which is important if your crankshaft journals have been machined down during a previous rebuild or to correct wear. This set is designed to fit a range of Datsun and Nissan vehicles, including the 810, 240Z, 260Z, 280ZX, and Maxima models from the early 70s through the mid-80s.

The bimetal construction means these bearings use layers of different metals to handle the demanding conditions inside your engine. The aluminum base offers good embeddability and conformability, helping the bearing to seat properly against the crankshaft, while other layers provide strength and wear resistance. This updated design helps ensure smooth operation and longevity for your L28 engine.