Audi Q7 2007
!
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
1 Removing and installing parts of exhaust system
217
6
1.10
Stress-free alignment of exhaust system
•
The exhaust system must be aligned when it is cool.
–
Loosen bolts of clamp
⇒
item 3 on page 202
.
–
Press exhaust system to front -arrow- until the rubber
mountings are pre-loaded to the specified dimensions:
•
Rubber mounting (front left): dimension -a- = 4 mm.
•
Rubber mounting (rear left and right): dimension -a- = 10
mm.
–
Make sure exhaust system remains in this position and
tighten clamping bolts evenly to 23 Nm.
If any of the specified dimensions is not attained, remove rel-
evant brackets from body and adjust as required.
–
Align tailpipes
⇒
page 204
.
1.11
Checking exhaust system for leaks
–
Start engine and run at idling speed.
–
Seal off tailpipes for duration of leak test with cloths or
plugs, etc.
–
Listen for leaks at joints between cylinder head/exhaust
manifold, exhaust manifold/intermediate pipe, intermediate
pipe/intermediate flange, intermediate flange/turbocharg-
er, etc.
–
Repair any leaks that are found.
Component
Nm
Intermediate pipe to:
exhaust manifold
30 + 90
°
1)2)3)
intermediate
flange
30 + 90
°
1)2)3)
Air pipe to:
bracket
9
lifting eye
9
Bracket for electrical connector to cylinder
head cover
9
•
1)
Renew bolts.
•
2)
90
°
= one quarter turn.
•
3)
Coat with high-temperature paste; refer to
⇒
Parts
catalogue.
Note
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