Valve Guides, Checking

WARNING: This page is about a different car, the 2022 Audi S7 and 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Dial Indicator Holder: VW387

Fig 1: Dial Gauge Holder
Courtesy of AUDI OF AMERICA, LLC
Dial Indicator - 0-10mm: VAS6079

Fig 2: Dial Gauge
Courtesy of AUDI OF AMERICA, LLC

Procedure

If the valve is replaced during a repair, use a new valve for measurement.
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.

Fig 3: Identifying Dial Gauge With Holder

Courtesy of AUDI OF AMERICA, LLC

-- Place the valve in the valve guide.

Valve stem tip must seal with the valve guide.

-- Determine the tilting clearance.

Wear limit: 0.8 mm.

-- If the wear limit is exceeded, measure using new valves.

-- Replace the cylinder head if the wear limit is still exceeded. (The valve guides cannot be replaced.)