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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 1028 (Cylinder Head, VALVETRAIN- CREC, Cred, CREH) >> Cylinder Head, VALVETRAIN >> Intake And Exhaust Valves >> Valve Dimensions

Valve Dimensions

WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 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 grinding is permitted.

GWWA15-0326Courtesy of AUDI OF AMERICA, LLC
Dimension Intake Valve Exhaust Valve
Diameter -a- mm 33.85 ± 0.10 28.0 ± 0.10
Diameter -b- mm 5.98 ± 0.01 5.96 ± 0.01
-c- mm 104.00 ± 0.20 101.9 ± 0.20
-α- ∠° 45 45
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.