What does '1.0mm oversize' mean for these bearings?

This means the bearings are manufactured to be 1.0mm larger in diameter than a standard-sized bearing. This is typically used when the crankshaft journals have been machined down (ground undersize) to remove wear or damage from a previous engine issue.

What is the construction of these bearings?

These bearings feature a bimetal construction with an aluminum base. This type of construction is common for engine bearings, offering good wear resistance and thermal properties.

Do these bearings come with installation instructions?

While these bearings are designed as a direct replacement, it is always recommended to consult the vehicle's official service manual for specific installation procedures, torque specifications, and proper oil clearance measurements.

Specifications

Brand: King Engine Bearings
Part #: MB5528AM1.0
UPC: 611500200519

King Engine Bearings Mazda 626 F8/(Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Mazda 626 F8/(Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mazda-626-f8-size-1-0mm-main-bearing-s-t14-770784
Price: 52.48 USD
Availability: BackOrder

$52.48

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Fits 1986-1992 Mazda 626. King Engine Bearings main bearing set, 1.0mm oversize, for improved engine reliability.

Key Features

Fits 1986-1992 Mazda 626, 1989-1992 Ford Probe, and 1988-1992 Mazda MX-6.
This is a main bearing set, designed to support the crankshaft in the engine block.
The bearings are 1.0mm oversize, intended for use with a machined crankshaft.
Constructed with a bimetal design featuring an aluminum base for durability.
From a popular manufacturer known for engine bearings.

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About this part

Product Details

If you're rebuilding the bottom end of your 1986-1992 Mazda 626, especially with the F8 engine, a fresh set of main bearings is crucial. These bearings sit between your crankshaft and the engine block, supporting the rotating assembly and ensuring smooth operation. Worn bearings can lead to excessive noise, oil pressure loss, and eventually, catastrophic engine failure, so replacing them during an engine overhaul is a smart move.

This set from King Engine Bearings uses a bimetal construction with an aluminum base, a common and well-built material for modern engine bearings. They are manufactured to be 1.0mm oversize, which is important if your crankshaft has been machined undersize during a previous rebuild or to correct wear. Using the correct size bearing is key to achieving proper oil clearance, which is vital for lubrication and bearing longevity.

When installing these bearings, always refer to the manufacturer's service manual for the correct torque specifications and assembly procedures. Ensuring the crankshaft journals are clean and properly lubricated before installation will help these bearings perform as intended for your Mazda 626.