Valve Guides, Checking: Procedure

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: Determining Valve Rock (Wear Limit)

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If The 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.

-- 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.