Valve Guides, Checking

WARNING: This page is about a different car, the 2015 Audi A6 Quattro, 2014 Audi A6 Quattro, 2013 Audi A6, and 2012 Audi A6. 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

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 valve guide and an exhaust valve in the exhaust valve guide.

-- Secure the Dial Gauge - 0-10 mm VAS 6079 on the cylinder head with the Dial Gauge Holder VW 387 as shown in the illustration.

Fig 1: Identifying Dial Gauge With Holder

Courtesy of AUDI OF AMERICA, LLC

-- 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.