Measuring Ring To Groove Clearance

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Piston Ring Side Clearance

Courtesy of AUDI OF AMERICA, LLC

-- Clean the piston ring groove before checking.

Piston Ring	New mm	Wear Limit mm
1st Compression ring	0.035 to 0.085	0.200
2nd. Compression ring	0.005 to 0.045	0.150
Oil scraping ring	0.010 to 0.050	0.200