Checking Piston Ring Gap

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2017 Audi A5 Quattro, 2016 Audi A5 Quattro, 2015 Audi A5 Quattro, 2014 Audi A5 Quattro, and 2014 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Piston Ring Gap

Courtesy of AUDI OF AMERICA, LLC

-- Push the piston ring squarely to the cylinder wall from above down in the lower cylinder opening approximately 15 mm from bottom edge of the cylinder. To push in use a piston without rings.

Piston Ring Gap in Connection with the Two-Piece Oil Scraping Ring Dimensions in mm	New	Wear Limit
1. Compression ring	0.20 to 0.40 mm	0.80 mm
2. Compression ring	0.20 to 0.40 mm	0.80 mm
Oil Scraping Ring	0.25 to 0.50 mm	0.80 mm

PIston Ring Gap in Connection with the Three-Piece Oil Scraping Ring Dimensions in mm	New	Wear Limit
1. Compression ring	0.30 to 0.40 mm	0.60 mm
2. Compression ring	0.40 to 0.50 mm	0.70 mm
Oil Scraping Ring	Cannot be measured