Valve Dimensions

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Intake and exhaust valves must not be reworked. Only lapping is permitted.

Fig 1: Identifying Valve Dimensions
Courtesy of AUDI OF AMERICA, LLC

Dimension		Intake Valve		Exhaust Valve
Dimension		2.9L	3.0L	2.9L	3.0L
Diameter a	mm	32.0 ± 0.1		28.0 ± 0.1
Diameter b	mm	5.92 ± 0.02		5.92 ± 0.02
c	mm	102.43		103.184
α	∠	44°50' ± 10'	45	44°50' ± 10'	45