LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (4.2L - Engine Mechanical, Engine Code(S): BNS) >> 15 - Engine - Cylinder head, Valvetrain >> Valvetrain, servicing >> Valve dimensions

Valve dimensions

WARNING: This page is about a different car, the 2008 Audi RS 4 and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Valve Dimensions
GW00008214Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • Intake and exhaust valves must not be refaced by grinding. Only lapping is permitted.
Dimension Intake valve Exhaust valve
Dia. a mm 33.85 ± 0.10 28.0 ± 0.1
Dia. b mm 5.98 ± 0.01 5.96 ± 0.01
c mm 103.97 ± 0.20 101.9 ± 0.2
α ∠ ° 45 45
CAUTION:
  • 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.
scientia non olet · About LEMON Manuals