What does the '+25' size designation mean for these bearings?

The '+25' in the part number, specifically MB5707SI0.25, indicates that these bearings are 0.25mm (or approximately 0.010 inches) larger than standard size. This is used when the crankshaft journals have been machined down to accommodate new bearings with this larger size during an engine rebuild.

Are these bearings suitable for high-performance or racing engines?

These bearings are described as ideal for medium-load engines. While well-built, they are not specifically marketed for extreme high-load racing applications. For those, you might need to consult King's performance lines.

What is the advantage of a lead-free composite bearing?

Lead-free bearings are considered more environmentally friendly during manufacturing and disposal. King's lead-free composite material is also designed to perform well in medium-load applications, offering good durability and performance.

Specifications

Brand: King Engine Bearings
Part #: MB5707SI0.25
UPC: 611500549151

King Engine Bearings Hyundai G4KE / G4KC (Size +25) Main Bearings (Set of 5)

Name: King Engine Bearings Hyundai G4KE / G4KC (Size +25) Main Bearings (Set of 5)
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-hyundai-g4ke-g4kc-size-25-main-bearing-t14-84220
Price: 30.32 USD
Availability: InStock

$30.32

Only 1 left in stock

King Engine Bearings Hyundai G4KE / G4KC (Size +25) Main Bearings (Set of 5). Essential for engine rebuilds, these bearings ensure proper crankshaft support.

Key Features

Fits a wide range of Hyundai and Kia vehicles with G4KE or G4KC engines.
Main bearing set includes 5 bearings for complete crankshaft support.
Sized +0.25mm, suitable for use with crankshafts machined to this size.
Constructed with a bi-metal aluminum material.
Features a lead-free composite, making it environmentally safe.
Designed for medium-load engine applications.

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About this part

Product Details

When you're rebuilding the bottom end of your Hyundai or Kia engine, getting the main bearings right is crucial for long-term reliability. This set of main bearings from King Engine Bearings is specifically made for engines with the G4KE or G4KC designation, and they're sized 0.25mm over, which is important if your crankshaft journals have been machined to that size. King has been specializing in bearings since 1960, focusing on making them well-built for the job.

These bearings use a bi-metal aluminum material that's lead-free and environmentally safe, making them a solid option for medium-load engines like those found in many everyday vehicles. They fit a wide range of popular models, including the Kia Optima, Hyundai Sonata, and Kia Sorento, ensuring your engine's crankshaft spins smoothly and with the correct clearances. Getting the right bearing size is key, so double-check if your crankshaft has been machined to the +0.25mm size before ordering.