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

The +0.25mm sizing indicates that these bearings are designed to be used with crankshaft journals that have been machined down by 0.25mm (approximately 0.010 inches). This is common during engine rebuilds when the crankshaft needs resurfacing.

What is the bimetal construction with an aluminum silicon base?

This construction uses a combination of materials. The bimetal layer provides strength and wear resistance, while the aluminum silicon base offers good thermal conductivity and conformability to the crankshaft.

Are these bearings sold individually or as a set?

This product is a set of connecting rod bearings. Typically, a set includes all the bearings needed for all the connecting rods in your engine.

Specifications

Brand: King Engine Bearings
Part #: CR6778SI0.25
UPC: 611500475177

King Engine Bearings Audi Acz/Aah/Ack/Aej/Asn/Ltr (Size +0.25mm) Connecting Rod Bearing Set

Name: King Engine Bearings Audi Acz/Aah/Ack/Aej/Asn/Ltr (Size +0.25mm) Connecting Rod Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-audi-acz-aah-ack-aej-asn-ltr-size-0-25-t14-770074
Price: 56.51 USD
Availability: BackOrder

$56.51

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Fits 1997-2005 Audi A4. King Engine Bearings connecting rod bearing set, size +0.25mm. Bimetal construction for durability.

Key Features

Fits 1997-2005 Audi A4, 1998-1999 and 2002-2004 Audi A6, and 1998-2000 Volkswagen Passat.
Designed for Audi ACZ, AAH, ACK, AEJ, ASN, and LTR engine codes.
Connecting rod bearing set sized at +0.25mm.
Constructed with a bimetal (aluminum silicon base) material for durability.
Direct fit replacement for the original equipment bearings.

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About this part

Product Details

If you're rebuilding the engine in your 1997-2005 Audi A4, A6, or Volkswagen Passat, these connecting rod bearings from King Engine Bearings are a solid option. They are specifically made for the ACZ, AAH, ACK, AEJ, ASN, and LTR engine codes, ensuring a direct fit for your application.

These bearings are constructed from a bimetal material with an aluminum silicon base. This construction offers good durability for the demands of engine operation. This set is sized at +0.25mm, which is important to note if you are machining your crankshaft journals to match.