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

The '+0.25mm' indicates that these main bearings are 0.25 millimeters larger in diameter than standard size. This is used when the crankshaft journals have been machined down by 0.25mm to remove imperfections or wear.

What is the purpose of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They create a low-friction surface for the crankshaft to rotate on, ensuring the engine runs smoothly and efficiently.

What is the overlay material mentioned for these bearings?

The overlay material is a specialized coating applied to the bearing surface. It helps the bearing conform to the crankshaft, which can improve oil distribution and reduce wear.

King Engine Bearings Main Bearing Set MB4272MC0.25

Name: King Engine Bearings Holden Alloytec 175/190 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-holden-alloytec-175-190-size-0-25mm-ma-t14-770376
Price: 96.05 USD
Availability: BackOrder

King Engine Bearings Holden Alloytec 175/190 (Size +0.25mm) Main Bearing Set

$96.05

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 MB4272MC0.25 for Holden Alloytec 175/190 engines. This is a 0.25mm undersize set.

Key Features

Main bearing set for Holden Alloytec 175/190 engines.
0.25mm undersize for use with a machined crankshaft.
Features a specialized overlay material for improved oil flow and reduced friction.
Designed to handle engine pressures and temperatures.

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Product Details

This is a main bearing set from King Engine Bearings, specifically designed for Holden Alloytec 175/190 engines. These bearings are crucial for the rotating assembly, supporting the crankshaft within the engine block and ensuring smooth operation. This particular set is sized 0.25mm undersize, which is important if your crankshaft has been machined to that specification during a rebuild.

King Engine Bearings is known for making well-built engine components. This set uses a specialized overlay material that helps it conform to the crankshaft surface, which can improve oil flow and reduce friction. The material is also designed to handle the pressures and temperatures found in an engine, making it a solid option for rebuilding your Holden's engine.

When installing these bearings, it's important to follow the manufacturer's torque specifications and ensure the crankshaft journals are clean and properly prepped. Using the correct assembly lube is also key to protecting the bearings during initial startup.