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2.6.1
Reworking inlet valve seat
a
=
∅ 32.8 mm
b
=
Max. permissible re‐
working dimension
6)
c
=
0.9…1.5 mm
d
=
max. ∅ 38.0 mm
r2
=
radius 2.0 mm
Z
=
Lower edge of cylin‐
der head
α
=
45° valve seat angle
β
=
30° upper correction
angle
g
=
60° lower correction
angle
2.6.2
Reworking exhaust valve seat
a
=
∅ 29.8 mm
b
=
Max. permissible re‐
working dimension
6)
c
=
1.2…1.7 mm
d
=
max. ∅ 35.0 mm
r2
=
radius 2.0 mm
Z
=
Lower edge of cylin‐
der head
α
=
45° valve seat angle
β
=
30° upper correction
angle
g
=
60° lower correction
angle
6) The max. permissible reworking dimension is shown as dimension “b” in the
illustrations for reworking valve seats.
Phaeton 2003 ➤
6-cylinder injection engine - Edition 02.2014
2. Valve gear
93