What does the '+1.0' size designation mean for these bearings?

The '+1.0' indicates that these bearings are 0.001 inches larger in diameter than standard size. This is used when the crankshaft journals have been machined undersize during an engine rebuild to correct wear or damage.

What is the construction of these main bearings?

These bearings feature a bimetal construction, which means they have an aluminum base. This type of construction is chosen for its good heat dissipation and wear resistance properties.

Do I need to purchase anything else to install these bearings?

When rebuilding an engine, you will typically need a new engine gasket set, oil, and oil filter. It's also recommended to have the crankshaft professionally measured and machined if necessary, and to follow the manufacturer's torque specifications during installation.

Specifications

Brand: King Engine Bearings
Part #: MB5171AM1.0
UPC: 611500225048

King Engine Bearings Mazda FS-DE L4/FP L4/FS L4 DOHC 16 Valve (Size +1.0) Main Bearing Set

Name: King Engine Bearings Mazda FS-DE L4/FP L4/FS L4 DOHC 16 Valve (Size +1.0) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mazda-fs-de-l4-fp-l4-fs-l4-dohc-16-val-t14-280110
Price: 54.52 USD
Availability: BackOrder

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Fits 1994-2005 Mazda Miata. King Engine Bearings Main Bearing Set, size +1.0, for engine rebuilding.

Key Features

Fits 1994-1997 and 1999-2005 Mazda Miata.
Also fits 1993-1997 Ford Probe, 1993-2002 Mazda 626, 1993-1997 Mazda MX-6, and 1999-2000 Mazda Protege.
Main bearing set designed for engine rebuilding applications.
Features a bimetal construction with an aluminum base for heat and wear management.
This set is sized +1.0, intended for use with a crankshaft machined to this undersize.

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About this part

Product Details

If you're rebuilding the engine in your 1994-2005 Mazda Miata, getting the main bearings right is crucial for proper crankshaft support and oil pressure. This main bearing set from King Engine Bearings is designed to fit your specific application, ensuring the crankshaft spins smoothly within the engine block. These bearings are built with a bimetal construction, meaning they have an aluminum base, which helps manage heat and wear effectively.

This particular set is sized at +1.0, which is important if you're dealing with a crankshaft that has been machined undersize during a rebuild. Using the correct undersize bearing ensures a tight, proper fit, which is essential for maintaining oil clearance and preventing premature wear. King Engine Bearings is a well-known name in engine components, and this set is a solid option for anyone looking to restore or enhance their engine's internal health.