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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