Audi Q7 2007
!
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
1 Removing and installing cylinder head
111
6
•
The injectors must be completely undamaged. To remove
the old copper seal from the injector, clamp the seal care-
fully in a vice so that it is just held between the jaws with-
out turning. Then carefully pull and twist the injector out
of the copper seal by hand.
•
When an injector is renewed, also renew the injector pipe
and clamping piece at the same time.
•
Used injectors and injector pipes may only be re-installed
on the same cylinder.
–
Install injectors.
–
Tighten union nuts on high-pressure pipes hand-tight ini-
tially.
–
Ensure that high-pressure pipes are not under tension.
–
To tighten unions of high-pressure pipes at rail elements,
use torque wrench -V.A.G 1331- with tool insert, AF 19
-V.A.G 1331/5-.
–
To tighten unions of high-pressure pipe at high-pressure
pump, use torque wrench -V.A.G 1331- with ratchet
-V.A.G 1331/1- and socket, 17 mm -T40055-.
–
Check fuel system for leaks
⇒
page 3
.
Tightening torques
Component
Nm
Cylinder head cover to cylinder head
9
Injector in cylinder head
9
Cover for injector to cylinder head
5
High-pressure pipes
25
Bracket for wiring harness to cylinder head
9
Bracket for intake connecting pipe to cylin-
der head
9
Throttle valve
module -J338-
with intake
connecting
pipe to:
intake manifold
9
bracket
9
connecting pipe for me-
chanical exhaust gas recir-
culation valve
9
Hose clips (13 mm wide)
5.5
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