What does the '+0.25mm' size designation mean for these bearings?

The '+0.25mm' indicates that these bearings are 0.25mm undersize compared to the original factory size. This means they are intended for use when the crankshaft journals have been machined down by 0.25mm to address wear or out-of-round conditions.

Why is proper main bearing clearance important during an engine rebuild?

Proper main bearing clearance is critical for maintaining consistent oil pressure and ensuring the crankshaft is adequately supported. Too little clearance can lead to friction and overheating, while too much can cause low oil pressure and excessive wear.

Does this set include everything needed to replace the main bearings?

This set includes the main bearings themselves. It is recommended to consult the manufacturer's installation instructions for any additional components or specialized tools that may be required for proper installation.

Specifications

Brand: King Engine Bearings
Part #: MB5878SM0.25
UPC: 611500627033

King Engine Bearings Ford Duratorq-Tdci Ecoblue (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Ford Duratorq-Tdci Ecoblue (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-duratorq-tdci-ecoblue-size-0-25mm-t14-771026
Price: 68.24 USD
Availability: BackOrder

$68.24

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King Engine Bearings Main Bearing Set MB5878SM0.25 for Ford Duratorq-Tdci Ecoblue engines. This is a 0.25mm undersize set.

Key Features

Main bearing set for Ford Duratorq TDCI EcoBlue engines.
This set is 0.25mm undersize, intended for use with a machined crankshaft.
Features multi-layer bearing technology for effective oil management and reduced friction.
Designed to provide proper crankshaft support and maintain oil pressure.

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About this part

Product Details

If you're rebuilding the bottom end of your Ford Duratorq TDCI EcoBlue engine, getting the main bearings right is crucial for proper crankshaft support and oil pressure. This set from King Engine Bearings is specifically made to replace the stock main bearings, and it's sized 0.25mm undersize, which is important if your crankshaft journals have been machined to match this size during a rebuild.

King Engine Bearings are known for their well-built construction. This set uses a multi-layer bearing technology that helps manage oil flow and reduce friction, which is key for keeping your engine running smoothly and reliably. The 0.25mm undersize means these bearings are designed to fit crankshafts that have been machined down by that amount to clean up wear or out-of-round conditions. Using the correct size bearing is essential for maintaining proper oil clearance, which directly impacts oil pressure and the longevity of your engine's rotating assembly.