Touareg V8-4.2L (AXQ) (2006)
Measured distance - a - minus minimum dimension = max. permissible refaced dimension.
Example:
‹› If maximum allowed refaced dimension is 0 mm or less than 0 mm, repeat measurement using new valve. If the measured result does not change,
replace the cylinder head.
Valve seats, reworking
Reworking intake valve seat
a
= Dia. 26.2 mm
b
= 1.5 to 10.8 mm
Z
= Cylinder head lower edge
alpha 45° valve seat angle
β30° upper correction angle
γ
60° lower correction angle
Reworking exhaust valve seat
a
= Dia. 29.0 mm
b
= approx. 1.8 mm
Z
= Cylinder head lower edge
alpha 45° valve seat angle
β30° upper correction angle
γ
60° lower correction angle