What does the '+1.0mm' sizing mean for these main bearings?

The '+1.0mm' designation indicates that these bearings are 1.0mm larger in diameter than standard size. They are designed to be used when the crankshaft journals have been machined down by 1.0mm to remove wear or damage, ensuring a proper fit and oil clearance.

What is the material of these main bearings?

These main bearings are made from a bimetal construction with an aluminum silicon base. This material is chosen for its good wear characteristics and compatibility with engine oil, making it a solid choice for engine bearing applications.

Do I need to purchase anything else when installing these main bearings?

When installing main bearings as part of an engine rebuild, you will typically need new main cap bolts, assembly lube, and potentially a torque wrench to ensure proper installation. Always refer to the manufacturer's service manual for specific installation procedures and torque specifications.

Specifications

Brand: King Engine Bearings
Part #: MB5284SI1.0
UPC: 611500422737

King Engine Bearings Chrysler/Jeep 287Ci 4.7L (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Chrysler/Jeep 287Ci 4.7L (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chrysler-jeep-287ci-4-7l-size-1-0mm-ma-t14-770626
Price: 64.00 USD
Availability: BackOrder

$64.00

On Backorder

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Fits 2000-2005 Dodge Dakota. King Engine Bearings main bearing set, sized +1.0mm, for your 4.7L engine rebuild.

Key Features

Fits 2000-2005 Dodge Dakota, 2000-2005 Dodge Durango, 2002-2005 Dodge Ram 1500, and 1999-2004 Jeep Grand Cherokee with the 4.7L engine.
Main bearing set for the 287ci 4.7L Chrysler/Jeep engine.
Bearings are sized +1.0mm, intended for use with a crankshaft machined undersize by 1.0mm.
Constructed with a bimetal aluminum silicon base for durability and oil compatibility.
Helps ensure proper crankshaft support and oil clearance in the engine.

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About this part

Product Details

If you're rebuilding the bottom end of your 2000-2005 Dodge Dakota, Durango, Ram 1500, or Jeep Grand Cherokee with the 4.7L engine, a fresh set of main bearings is crucial. These King Engine Bearings main bearing set is specifically designed for that engine, helping to ensure proper crankshaft support and oil clearance during operation.

These bearings are constructed with a bimetal aluminum silicon base, a common and reliable material for engine bearings that offers good wear resistance and compatibility with engine oils. This particular set is sized +1.0mm, meaning they are intended for use when the crankshaft journals have been machined down by 1.0mm to clean up wear or damage. Using the correct bearing size is essential for maintaining proper oil pressure and preventing premature engine wear.

When rebuilding an engine, using well-made bearings like these from King Engine Bearings is a smart choice. They are designed to fit right and provide the support your crankshaft needs for the life of the engine.