Valve Dimensions

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Fig 1: Identifying Valve Dimensions

Courtesy of AUDI OF AMERICA, LLC

NOTE:

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

Dimension		Intake Valve	Exhaust Valve
Diameter a	mm	33.85 ± 0.10	28.0 ± 0.1
Diameter b	mm	5.92 ± 0.02	5.92 ± 0.02
c	mm	103.97	101.87
α	∠°	45	45