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Home >> Audi >> 2014 >> TT Quattro Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 73 (2.0L - Cylinder Head, VALVETRAIN - Engine Code(S): CDMA (Roadster)) >> 15 Cylinder Head, VALVETRAIN >> Specifications >> Valve Dimensions

Valve Dimensions

WARNING: This page is about a different variant/trim than selected.
NOTE:

Intake and exhaust valves must not be refaced by grinding. Only lapping is permitted.

Fig 1: Identifying Valve Dimensions
GWWA15-0326Courtesy 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
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.