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

The +0.25mm sizing indicates that these bearings are intended for use when the crankshaft journals have been machined down by 0.25mm. This is a common practice during engine rebuilding to ensure a clean surface and proper clearance.

What is the advantage of an aluminum base in engine bearings?

An aluminum base in bimetal bearings helps with heat dissipation and provides a good bearing surface. It's a well-established material choice for managing the thermal and mechanical stresses within an engine.

Does this main bearing set include everything needed for installation?

This product is a main bearing set. It is recommended to consult your vehicle's service manual for a complete list of parts and procedures required for engine rebuilding, as other components may be necessary.

Specifications

Brand: King Engine Bearings
Part #: MB5231AM0.25
UPC: 611500240119

King Engine Bearings Nissan L13/L14/Z18 (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Nissan L13/L14/Z18 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-l13-l14-z18-size-0-25mm-main-be-t14-770565
Price: 74.11 USD
Availability: BackOrder

$74.11

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Fits 1968-1973 Nissan 510. King Engine Bearings Main Bearing Set, sized +0.25mm, uses an aluminum base for reliable engine performance.

Key Features

Fits 1968-1973 Nissan 510.
Also fits Nissan 521 Pickup (1969-1972), 610 (1973), 620 Pickup (1972-1974), and 710 (1974).
Main bearing set for Nissan L13, L14, and Z18 engines.
Sized +0.25mm for use with machined crankshaft journals.
Constructed with a bimetal aluminum base for heat and wear management.

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About this part

Product Details

These main bearings from King Engine Bearings are built with an aluminum base, a material choice that helps manage heat and wear inside your Nissan's L13, L14, or Z18 engine. If you're rebuilding the bottom end of your 1968-1973 Nissan 510, or any of the compatible Nissan trucks and sedans from the era, getting the main bearings right is crucial for a healthy crankshaft. These are sized +0.25mm, meaning they are meant to be used when the crankshaft journals have been machined down by that amount to clean them up or account for previous wear.

King Engine Bearings uses a bimetal construction for these main bearings, combining the strength of aluminum with other alloys to create a durable surface that can handle the stresses of engine operation. This set is designed as a direct replacement for your original equipment, ensuring a proper fit during installation. When you're putting an engine back together, especially one from this generation of Nissan vehicles, using well-made components like these bearings will help ensure a smooth-running and reliable powerplant.