Valve Guides, Checking
WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
- Dial Gauge Holder VW387
- Dial Gauge - 0-10mm VAS6079
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 - 0-10mm VAS6079 on the cylinder head with the Dial Gauge Holder 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.