LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2009 >> Q7 4.2 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (3.0L - Cylinder Head & VALVETRAIN - Engine Code: CATA) >> 15 Cylinder Head, VALVETRAIN >> VALVETRAIN >> 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 grinding is permitted.

Fig 1: Identifying Valve Dimensions
GWWA15-0326Courtesy of AUDI OF AMERICA, LLC
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° 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.