Valve guides, checking

WARNING: This page is about a different car, the 2010 Audi A8, 2009 Audi A8, 2008 Audi A8, and 2007 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

GW00000116

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Dial gauge holder VW 387

GW00017513

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Dial gauge VAS 6079

Work procedure

NOTE:

If valve is replaced during repair, use new valve for measurement.
Due to different stem diameters, only use an intake valve in the intake guide and an exhaust valve in the exhaust guide.
Insert valve into valve guide.
Valve stem tip must seal with valve guide.

GW00000350

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Determine tilt clearance.

Wear limit: 0.8 mm.

If wear limit is exceeded, re-measure using new valves.
If wear limit is still exceeded, replace cylinder head.

NOTE:

The valve guides cannot be replaced.