What does '0.040in O/S' mean for these bearings?

O/S stands for 'oversize,' but in the context of engine bearings, it typically means 'undersize' relative to the original factory specification. This indicates the bearings are designed for a crankshaft that has been machined down by 0.040 inches to ensure proper oil clearance during an engine rebuild.

What is the benefit of the coating on these bearings?

The special coating on these King Engine Bearings is intended to improve performance by reducing friction and enhancing oil retention. This is particularly beneficial during engine break-in and under high-load operating conditions, helping to protect the bearing surfaces.

What else might I need when installing these main bearings?

When installing main bearings, it's essential to have the crankshaft properly machined and measured to the correct undersize. You will also need assembly lube, a torque wrench to tighten the main caps to specification, and potentially new main cap bolts or studs depending on the engine's condition.

Specifications

Brand: King Engine Bearings
Part #: MB5848GPC
UPC: 611500617577

King Engine Bearings General Motors Duramax Diesel 0.040in O/S Coated Main Bearing Set

Name: King Engine Bearings General Motors Duramax Diesel 0.040in O/S Coated Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-general-motors-duramax-diesel-0-040in--t14-432558
Price: 219.35 USD
Availability: BackOrder

$219.35

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King Engine Bearings MB5848GPC main bearing set for GM Duramax Diesel. 0.040in undersize with a performance coating.

Key Features

This is a 0.040 inch undersize main bearing set for General Motors Duramax Diesel engines.
Features a performance coating designed to reduce friction and improve oil film strength.
Well-built multi-layer bearing construction with a steel backing for durability.
Part number MB5848GPC from King Engine Bearings.

This main bearing set is designed for General Motors Duramax Diesel engines and is 0.040 inch undersize. Always confirm your crankshaft has been machined to this specific undersize before installation.

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About this part

Product Details

If you're rebuilding the bottom end of your General Motors Duramax Diesel engine, this King Engine Bearings MB5848GPC main bearing set is a solid option. This set is specifically designed to be 0.040 inches undersize, which is crucial when the crankshaft journals have been machined to match this size during an overhaul. King is known for making well-built engine bearings, and this set features a special coating that helps reduce friction and improve oil retention, especially during the critical break-in period and under demanding conditions.

These bearings are built with a multi-layer structure that includes a steel backing for strength, a unique overlay material for durability, and the added performance coating. This combination helps them withstand the high loads and temperatures typical of a Duramax diesel engine. When installing, make sure your crankshaft journals have been properly machined and measured to the 0.040 inch undersize specification to ensure these bearings function correctly and provide the intended clearance.