Valve Guides, Checking: Procedure
WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 2016 Audi A6 Quattro. 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 the tilting 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.