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

The +0.25mm, or 0.020 inches, indicates that these bearings are undersize. They are designed to be used when the crankshaft's main journals have been machined down by 0.020 inches to correct wear or damage. This ensures proper oil clearance when used with a machined crankshaft.

What is the 'MC' designation in the part number?

The 'MC' designation in the part number signifies that these bearings belong to King Engine Bearings' 'High Performance' series. This series utilizes a special overlay material engineered to handle higher loads and temperatures compared to standard bearings.

What is the typical application for these bearings?

These bearings are typically used during an engine rebuild for Ford 3.5L Ecoboost V6 engines. They are suitable for restoring stock performance or for builds that may experience more demanding operating conditions, provided the crankshaft has been machined to the correct undersize.

Specifications

Brand: King Engine Bearings
Part #: MB4569MC0.25
UPC: 611500631733

King Engine Bearings Ford Ecoboost 3.5L V6 +0.020 Os Od (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Ford Ecoboost 3.5L V6 +0.020 Os Od (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-ecoboost-3-5l-v6-0-020-os-od-size-t14-770426
Price: 154.38 USD
Availability: BackOrder

$154.38

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Main bearing set for Ford 3.5L Ecoboost V6 engines.
Features King's tri-metal construction with a steel-backed overlay, copper-lead alloy, and tin-zinc plating.
Size is +0.25mm (0.020 inches) undersize for use with machined crankshafts.
Part of King's 'High Performance' (MC) series, designed for increased load and temperature capacity.
Helps manage heat and reduce friction in the engine's main bearing journals.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

These King Engine Bearings main bearings are built with a unique tri-metal construction, featuring a steel-backed overlay that's bonded to a copper-lead alloy with a thin, hard tin-zinc plating. This advanced layering helps manage heat and reduce friction, which is crucial for the demanding environment inside an Ecoboost engine. They are specifically sized at +0.25mm, or 0.020 inches, undersize, meaning they are intended for crankshafts that have been machined down to match this specification during an engine rebuild.

The 'MC' in the part number signifies King's 'High Performance' series, which uses a special overlay material designed to withstand higher loads and temperatures. This makes them a solid option for rebuilding a 3.5L Ford Ecoboost V6 engine, whether it's for restoring stock performance or for a build that sees more spirited use. Proper installation is key; these bearings are designed to fit precisely into the prepared main journals of the crankshaft and the engine block, ensuring optimal oil clearance and lubrication.

When rebuilding your 3.5L Ecoboost, using bearings that are precisely sized and constructed for the application is essential for engine longevity. These King bearings offer a well-built solution for ensuring your engine's rotating assembly is properly supported and lubricated.