What does the +0.50mm size mean for these bearings?

The +0.50mm designation indicates that these bearings are designed for a crankshaft that has been machined down by 0.50mm. This is common during engine rebuilds when the original crankshaft journals have wear or damage and need to be resurfaced.

What is the construction of these main bearings?

These main bearings feature a bimetal construction with an aluminum base. This type of material is chosen for its performance characteristics in high-stress engine environments.

Is this set a direct replacement for MB5139AM?

This MB5226AM0.5 set is noted as an optional replacement for the MB5139AM, especially when the crankshaft flange is standard. It's important to verify your specific crankshaft dimensions and machining requirements.

King Engine Bearings Main Bearing Set MB5226AM0.5

Name: King Engine Bearings Mazda 626 F8 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mazda-626-f8-size-0-50mm-main-bearing--t14-770545
Price: 47.72 USD
Availability: BackOrder

King Engine Bearings Mazda 626 F8 (Size +0.50mm) Main Bearing Set

$47.72

On Backorder

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King Engine Bearings Main Bearing Set MB5226AM0.5 for Mazda 626 F8. This is a +0.50mm undersize set.

Key Features

Fits Mazda 626 F8 engine.
Main bearing set.
Size is +0.50mm undersize.
Constructed with a bimetal design and an aluminum base.

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Product Details

This is a main bearing set from King Engine Bearings, specifically for the Mazda 626 F8 engine. These bearings are crucial for supporting the crankshaft within the engine block, allowing it to spin smoothly while handling the immense forces generated during combustion. This particular set is sized at +0.50mm, meaning it's intended for crankshaft journals that have been machined down by 0.50mm during an engine rebuild.

The bearings themselves are constructed with a bimetal design, featuring an aluminum base. This construction is chosen for its ability to handle the demanding environment inside an engine, providing reliable support for the rotating assembly. When you're rebuilding an engine and need to ensure the crankshaft has proper support, a well-made bearing set like this is essential for long-term reliability.

This set is an optional replacement for the MB5139AM, particularly when dealing with a crankshaft that has already been machined to a standard size for the flange. Always ensure your crankshaft journals have been measured and machined to the correct size before installing any undersize bearings.