Valve guides, checking

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Dial Gauge Holder VW 387

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Dial gauge holder VW 387
Dial gauge

Test sequence

Fig 2: Identifying Special Tool - VW 387 Installed

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Insert valve into guide. The end of the valve stem must be flush with the guide. Due to the slight difference in stem dimensions, ensure that only an intake valve is used in the intake guide and an exhaust valve in exhaust guide.
Determine tip clearance.

Wear limit

Intake valve guide	Exhaust valve guide
0.80 mm	0.80 mm

NOTE:

If wear limit is exceeded, re-measure using new valves. If wear limit is still exceeded, replace cylinder head. The valve guides cannot be replaced.
If the valve is to be replaced as part of a repair, use a new valve for the calculation.