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Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 997 (Cylinder Head, VALVETRAIN- CLAB, CLAA, CDUC, CGQB, CKVB, CKVC, CDUD, CPNB, CTCB, CTCC, CVUA, CVUB) >> Cylinder Head, VALVETRAIN >> Intake And Exhaust Valves >> Valve Dimensions

Valve Dimensions

WARNING: This page is about a different car, the 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

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

GWWA15-0326Courtesy of AUDI OF AMERICA, LLC
Dimension Intake Valve Exhaust Valve
Diameter a mm 28.5 to 28.7 25.9 to 26.1
Diameter b mm 5.968 to 5.982 5.958 to 5.972
c mm 97.2 to 97.4 99.0 to 99.2
α ∠° 45° 10' 45° 10'
WARNING:

Risk of injury if exhaust valves with sodium filling are disposed of improperly.

  • Cut exhaust valve with sodium filling into 2 parts with a metal saw between shaft center and valve plate. While doing this, do not come into contact with water.
  • Throw at the most 10 such sawed exhaust valves in a bucket filled with water and step back immediately.
  • When there is contact with water, a sudden chemical reaction occurs which burns the sodium filling.
  • The treated parts may then be discarded through conventional disposal channels.