Checking pistons

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Piston

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Special tools and equipment

External micrometer 75-100 mm

Measure approx. 10 mm from lower edge, at a 90° angle to piston pin axis.

Deviation from nominal dimension: max. 0.04 mm

Specified dimension. Refer to Piston and cylinder measurements