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

The '+0.25mm' indicates that these bearings are 0.25mm larger in diameter than standard size. This is typically used when the crankshaft journals have been machined down by 0.25mm to remove wear or damage, and the new bearings need to compensate for that reduction in size.

What is the primary function of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly while maintaining proper oil clearance for lubrication.

Are these bearings sold individually or as a set?

This product is a set of main bearings, meaning it contains all the necessary bearings to replace the main bearings for the specified Renault engine models.

FEATURED BRAND = COVERKING CHECK OUT COVERKING NOW →

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

Specifications

Brand: King Engine Bearings
Part #: MB5288AM0.25
UPC: 611500382222

King Engine Bearings Renault F3R/F4R/F8Q/F9Q (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Renault F3R/F4R/F8Q/F9Q (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-renault-f3r-f4r-f8q-f9q-size-0-25mm-ma-t14-770636
Price: 36.40 USD
Availability: BackOrder

$36.40

On Backorder

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

King Engine Bearings Main Bearing Set MB5288AM0.25. This set is 0.25mm undersize for Renault F3R, F4R, F8Q, and F9Q engines.

Key Features

This set includes main bearings for Renault F3R, F4R, F8Q, and F9Q engines.
The bearings in this set are 0.25mm undersize.
King Engine Bearings is a popular brand for engine components.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This set includes the main bearings you need for your Renault F3R, F4R, F8Q, or F9Q engine rebuild. These bearings are built to specific tolerances, and this particular set is 0.25mm undersize, which is important if you're machining your crankshaft to match.

King Engine Bearings is a well-known name in engine components, and these bearings are made with their standard materials and construction. They're designed to handle the loads and temperatures found in everyday driving and moderate performance use. When you're putting an engine back together, especially after a rebuild or repair, having bearings that fit precisely is key to proper oil clearance and long-term engine health.