Engage piston ring ends, if necessary, or line up ring gaps at top

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 Whether Piston Rings At Camshafts Are Installed

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check whether piston rings at camshafts are installed and whether piston ring ends are engaged with each other.

NOTE: If ends of installed piston are not of the locking type (cannot be locked together):

Always orient the rings so that the gaps (of all three rings) are at the top of the camshaft prior to installation of the camshaft adjustment housing.

With all ring gaps aligned at the top of camshaft:

Install camshaft adjustment housing using a gentle side to side motion (do not rock top to bottom).

Fig 2: Hooking Ends Of Piston Ring Together

Courtesy of VOLKSWAGEN UNITED STATES, INC.

If necessary, engage ends of installed piston rings (arrows), as depicted in illustration.