Valve Guides, Checking

Special tools and workshop equipment required 

• Dial Indicator Holder: VW387 
  Fig 1: Dial Gauge Holder

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• Dial Indicator - 0-10mm: VAS6079 
  Fig 2: Dial Gauge

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Test Sequence

Fig 3: Identifying Dial Gauge With Holder

Courtesy of AUDI OF AMERICA, LLC

• If the valve is to be replaced as part of a repair, use a new valve for the 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 the valve in the valve guide.

• Valve stem tip must seal with the valve guide.

-- Determine the tilting clearance.

• Wear limit: 0.6 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.)