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

The +0.25mm sizing indicates that these bearings are designed for crankshaft journals that have been machined down by 0.25mm. This is common in engine rebuilds where the crankshaft has been ground to remove wear or damage.

What is the advantage of tri-metal material in engine bearings?

Tri-metal bearings use three layers of different materials to optimize performance. This construction offers a good balance of strength, embeddability (ability to absorb foreign particles), and conformability (ability to adapt to crankshaft imperfections), leading to improved durability and oil control.

Are these bearings a direct replacement for the original equipment?

These bearings are a direct fit for the specified Hyundai and Kia D4Cb engines, but they are an oversize (+0.25mm) replacement. Ensure your crankshaft journals have been machined to this specific size before installation.

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Specifications

Brand: King Engine Bearings
Part #: MB5651SI0.25
UPC: 611500527050

King Engine Bearings Hyundai/Kia D4Cb (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Hyundai/Kia D4Cb (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-hyundai-kia-d4cb-size-0-25mm-main-bear-t14-770884
Price: 42.10 USD
Availability: BackOrder

$42.10

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King Engine Bearings Hyundai/Kia D4Cb Main Bearing Set. Size +0.25mm.

Key Features

This set is sized +0.25mm for crankshaft journals that have been machined down.
Constructed with a high-performance tri-metal material for durability.
Designed for Hyundai and Kia D4Cb engines.
Helps maintain proper oil clearance for engine longevity.
Offers good embeddability and conformability to the crankshaft.

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About this part

Product Details

These main bearings are built with a high-performance tri-metal material, offering a solid foundation for your Hyundai or Kia D4Cb engine rebuild. This specific set is machined to a +0.25mm size, which is crucial for engines that have had their crankshaft journals ground down during a previous rebuild or due to wear. Using the correct undersize or oversize bearing ensures proper oil clearance, which is vital for engine longevity and performance.

King Engine Bearings is known for its attention to detail in bearing manufacturing. The tri-metal construction provides excellent embeddability and conformability, meaning the bearings can adapt to minor imperfections in the crankshaft while maintaining a consistent oil film. This helps to reduce friction and wear, keeping your engine running smoothly for longer. This set is designed to fit right into your D4Cb engine, making it a straightforward component for your engine build.