Valve Guides, Checking

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

Special tools and workshop equipment required

Dial Gauge Holder VW 387
Dial Gauge 0-10 mm VAS 6079

Procedure

Fig 1: Determining Valve Rock (Wear Limit)

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If the valve is replaced during repair, use a 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.

-- Place valve in valve guide.

Valve stem tip must seal with valve guide.

-- Determine tip clearance.

Wear limit: 0.8 mm.

-- If wear limit is exceeded, measure using new valves.

-- Replace the cylinder head if the wear limit is still exceeded.

NOTE:

The valve guides cannot be replaced.