Refacing valve seats
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
Intake valve seat
a - Dia. 26.6 mm
b - Approx. 1.0 mm
Z - Lower edge of cylinder head
α - 45 ° valve seat angle
β - 30 ° upper correction angle
γ - 60 ° lower correction angle
Exhaust valve seat
a - Dia. 26.0 mm
b - Approx. 1.0 mm
Z - Lower edge of cylinder head
α - 45 ° valve seat angle
β - 30 ° upper correction angle
γ - 60 ° lower correction angle
NOTE:
- Determining maximum allowable refacing dimension Determining maximum allowable refacing dimension .