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 a precise oil clearance to ensure proper lubrication and reduce friction.

What does the 'SI' in the part number MB5423SI indicate?

The 'SI' typically indicates that these bearings feature a high-performance overlay, which is a tin-based material designed for improved wear resistance and durability.

Are these bearings a direct replacement for the original equipment?

These main bearings are designed as a replacement for the original equipment in Toyota 1KZTE and 1KZT engines. Always verify fitment for your specific vehicle application.

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Specifications

Brand: King Engine Bearings
Part #: MB5423SI
UPC: 611500475658

King Engine Bearings Toyota 1KZTE/ 1KZT Main Bearing Set

Name: King Engine Bearings Toyota 1KZTE/ 1KZT Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-1kzte-1kzt-main-bearing-set-t14-432460
Price: 41.89 USD
Availability: BackOrder

$41.89

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 main bearing set for Toyota 1KZTE/1KZT engines. A solid option for engine rebuilds.

Key Features

This is a main bearing set for Toyota 1KZTE and 1KZT engines.
Features a high-performance overlay for improved wear resistance.
Designed to maintain proper oil clearance for the crankshaft.
Supports the crankshaft and helps prevent premature wear.

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About this part

Product Details

The MB5423SI main bearing set from King Engine Bearings is built with a high-performance overlay. This overlay is a tin-based material that offers improved wear resistance compared to standard bearings, which is crucial for the main bearings that support the crankshaft. If you're rebuilding the bottom end of your Toyota 1KZTE or 1KZT engine, these bearings are designed to handle the loads and stresses of daily driving and more demanding use.

King Engine Bearings is known for its attention to detail in bearing manufacturing. This set is made to fit your engine's specific requirements, ensuring proper oil clearance for the crankshaft. Maintaining the correct oil clearance is vital for lubricating the crankshaft and preventing premature wear, and these bearings are engineered to achieve that balance.