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Valve Dimensions

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Valve Dimensions
GWWA15-0326Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
NOTE:

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

Dimension Intake Valve Exhaust Valve
Diameter a mm 28.60 to 28.80 26.70 to 26.90
Diameter b mm 5.968 to 5.982 5.958 to 5.972
c mm 97.25 to 97.45 97.35 to 97.55
α ∠° 45 45
WARNING:
  • Worn sodium-filled exhaust valves must not be scrapped without first being properly treated.
  • Using a metal saw, the valves must be cut into two pieces between the shaft center and valve head. While doing this, do not come into contact with water. At the very most, throw 10 of the prepared valves into a bucket filled with water. Then, move quickly away, because a sudden chemical reaction will occur during which the sodium is burnt away.
  • The treated parts may then be discarded through conventional disposal channels.