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

The +0.25mm designation means these bearings are designed to be used when the crankshaft journals have been machined down by 0.25mm. This is a common practice during engine rebuilding to clean up worn or damaged surfaces.

What is the material of these bearings?

These bearings are constructed with a bi-metal aluminum material and feature a lead-free composite. This combination is chosen for its performance in medium-load engine applications and its environmentally safe composition.

Are these bearings suitable for high-performance engines?

These bearings are specifically noted as being ideal for medium-load engines. For high-performance or heavy-duty applications, you may need to consult King Engine Bearings' specialized performance lines.

Specifications

Brand: King Engine Bearings
Part #: MB5706SI0.25
UPC: 611500549182

King Engine Bearings Hyundai i30 G4FC (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Hyundai i30 G4FC (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-hyundai-i30-g4fc-size-0-25mm-main-bear-t14-163070
Price: 68.06 USD
Availability: BackOrder

$68.06

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 for Hyundai i30 G4FC. Size +0.25mm. A well-built replacement for your engine rebuild.

Key Features

Fits a range of Hyundai and Kia vehicles.
Main bearing set is +0.25mm undersize.
Bi-metal aluminum construction.
Lead-free composite material is environmentally safe.
Suitable for medium-load engines.

⚠️ 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 Hyundai or Kia, especially a G4FC engine, getting the main bearings right is crucial. This set from King Engine Bearings is built to spec for a +0.25mm undersize, meaning it's designed to be used when the crankshaft journals have been machined down by 0.25mm to clean them up. King specializes in bearings, and they've been doing it since 1960, focusing on making them as good as they can be.

These bearings use a bi-metal aluminum material and feature a lead-free composite. This makes them environmentally safe and well-suited for medium-load engines like those found in many everyday vehicles. They fit a range of Hyundai and Kia models, including the Accent, Sonata, Rio, and Soul, providing a solid option for your engine project.