What does '0.25mm undersize' mean for these bearings?

This means the bearings are designed for a crankshaft that has been machined down by 0.25mm. This is a common practice during engine rebuilds to ensure a proper fit with worn or resurfaced crankshaft journals.

Are these bearings suitable for a high-performance engine build?

These bearings are made from a bi-metal aluminum material and are ideal for low to medium-load engines. For high-performance applications with significantly increased stress, you may want to consult King Engine Bearings' performance line.

Do I need any special tools to install these main bearings?

Installing main bearings requires specific engine knowledge and tools, including torque wrenches and potentially crankshaft alignment tools. It's recommended to refer to the vehicle's service manual for the correct installation procedure.

Specifications

Brand: King Engine Bearings
Part #: MB5373AM0.25
UPC: 611500430701

King Engine Bearings Nissan Ga14DE/Ga16DE/Qg18DE (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Nissan Ga14DE/Ga16DE/Qg18DE (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-ga14de-ga16de-qg18de-size-0-25m-t14-770674
Price: 21.09 USD
Availability: BackOrder

$21.09

On Backorder

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Fits 1989-2006 Nissan Sentra. King Engine Bearings main bearing set, 0.25mm undersize. Essential for engine rebuilds.

Key Features

Fits 1989-2006 Nissan Sentra, 1995-1998 Nissan 200SX, 1991-1993 Nissan NX, and 1989-1990 Nissan Pulsar NX.
Main bearing set is 0.25mm undersize, intended for use with a machined crankshaft.
Constructed from a bi-metal aluminum material, suitable for low to medium-load engines.
Features a lead-free, environmentally safe composite.
Specialized bearing manufacturer with a focus on engine bearing quality since 1960.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're rebuilding the engine in your 1989-2006 Nissan Sentra, especially one with a GA14DE, GA16DE, or QG18DE engine, getting the main bearings right is critical. These bearings sit between your crankshaft and the engine block, supporting the rotating assembly and ensuring smooth operation. King Engine Bearings specializes in this exact component, and this set is built to support your engine's needs.

This particular set is a 0.25mm undersize, meaning it's designed for crankshafts that have been machined down by that amount during an engine rebuild. They're made from a bi-metal aluminum material, which is a solid choice for low to medium-load engines like those found in many Sentra models. King focuses solely on bearings, so they've put a lot of effort into making sure these are well-built for the job.

When you're putting an engine back together, the precision of the bearings makes a big difference. This set is designed to fit right and do its job reliably, helping to ensure your engine runs smoothly after the rebuild.