Valve Guides, Checking: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Audi S7, 2018 Audi RS 7, 2017 Audi S7, 2017 Audi RS 7, and 2016 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

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 :VAS6079 on the cylinder head with the :VW387 as shown in the illustration.

-- 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.