What is the main function of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while reducing friction and wear on the crank journals and the block itself.

Why is oil flow important for main bearings?

A consistent flow of oil creates a thin film between the bearing and the crankshaft journal. This oil film prevents metal-to-metal contact, which is crucial for reducing heat and preventing damage to both components.

Are these bearings a direct fit for my engine?

These main bearings are designed as a direct replacement for GM LS 4.3 V6 engines. However, it's always recommended to verify fitment with your specific vehicle's information before purchasing.

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Specifications

Brand: King Engine Bearings
Part #: MB4555MC
UPC: 611500616723

King Engine Bearings GM LS 4.3 V6 Main Bearing Set

Name: King Engine Bearings GM LS 4.3 V6 Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-gm-ls-4-3-v6-main-bearing-set-t14-432415
Price: 70.72 USD
Availability: BackOrder

$70.72

On Backorder

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

King Engine Bearings GM LS 4.3 V6 Main Bearing Set. These bearings are crucial for smooth crankshaft rotation.

Key Features

Fits GM LS 4.3 V6 engines.
Features a micro-grooved design for improved oil flow.
Utilizes a high-performance overlay material for durability.
Designed as a direct replacement for stock main bearings.

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About this part

Product Details

The micro-grooved design on these King Engine Bearings main bearings helps to improve oil flow to the crankshaft journals. This is important for keeping your GM LS 4.3 V6 engine running cool and preventing premature wear. When you're rebuilding the bottom end of your engine, a solid set of main bearings is essential for ensuring the crankshaft spins freely and without excessive friction.

King uses a high-performance overlay material on these bearings, which is designed to handle the stresses of engine operation. They're built to be a direct replacement for your stock bearings, meaning they should fit right into your engine block without any modification. This makes them a popular choice for engine rebuilds where reliability and proper function are key.