Valve Dimensions

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NOTE:

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
Diameter a	mm	33.85 ± 0.10	28.0 ± 0.1
Diameter b	mm	5.98 ± 0.01	5.96 ± 0.01
c	mm	104.0 ± 0.2	101.9 ± 0.2
α	∠°	45	45