What does the '+0.50mm' size designation mean for these bearings?

The '+0.50mm' indicates that these bearings are 0.50mm larger in diameter than standard size. This is typically used when the engine's crankshaft has been machined (ground) down by 0.50mm to remove wear or damage, and requires a corresponding undersize bearing to maintain proper clearance.

What is the advantage of a bimetal aluminum base construction?

Bimetal construction, often using an aluminum alloy as the base, offers a good balance of strength, wear resistance, and heat conductivity. This helps the bearing withstand the high loads and temperatures in an engine while effectively dissipating heat and maintaining proper oil film.

Are these bearings a direct replacement for all VW/Audi engines?

No, these bearings are specific to VW/Audi engines with certain engine codes (AKU, AQM, CR, CY, JK, JR, KY, RA) and are sized at +0.50mm. It is crucial to verify your engine's code and the required bearing size before purchasing.

Specifications

Brand: King Engine Bearings
Part #: MB5269AM0.5
UPC: 611500402661

King Engine Bearings VW/Audi Aku/Aqm/Cr/Cy/Jk/Jr/Ky/Ra (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings VW/Audi Aku/Aqm/Cr/Cy/Jk/Jr/Ky/Ra (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-vw-audi-aku-aqm-cr-cy-jk-jr-ky-ra-size-t14-770612
Price: 35.67 USD
Availability: BackOrder

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King Engine Bearings VW/Audi Aku/Aqm/Cr/Cy/Jk/Jr/Ky/Ra (Size +0.50mm) Main Bearing Set. This bimetal bearing set is 0.50mm undersize for a precise fit.

Key Features

Fits Audi A4 Quattro (1997-2001), Audi A4 (1997-1999, 2001), Audi TT (2005-2006), Volkswagen Beetle (1998-2005), Volkswagen Golf (1985-2006), Volkswagen Jetta (1985-2005), and Volkswagen Passat (1993-2005).
This is a main bearing set for VW/Audi engines with codes AKU, AQM, CR, CY, JK, JR, KY, RA.
The bearings are constructed with a bimetal aluminum base for durability and heat dissipation.
This set is machined to be 0.50mm undersize, suitable for crankshafts ground to this specification.

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About this part

Product Details

Built with a bimetal aluminum base, this main bearing set from King Engine Bearings is designed for specific VW and Audi engines, including those with codes like AKU, AQM, CR, CY, JK, JR, KY, and RA. These bearings are crucial for supporting the crankshaft within the engine block, ensuring smooth rotation and proper oil clearance. This particular set is machined to be 0.50mm undersize, which is important when rebuilding an engine that has had its crankshaft ground down to match this size.

King Engine Bearings uses a bimetal construction, which combines the strength of aluminum with other alloys to create a durable bearing surface that can handle the loads and temperatures found in an engine. This material choice helps to dissipate heat effectively and maintain proper oil film thickness, which is key to preventing wear. This set is a solid option for anyone rebuilding or repairing the bottom end of their VW or Audi engine, ensuring the crankshaft is properly supported.

This main bearing set fits a wide range of popular VW and Audi models, including the Audi A4, Audi TT, Volkswagen Beetle, Volkswagen Golf, Volkswagen Jetta, and Volkswagen Passat. Always refer to your vehicle's specific repair manual to confirm the correct bearing size and specifications for your engine rebuild.