S4 V8-4.2L (BHF) (2004)
-
Before catalytic converter
-
Bank 2, sensor 1
13. Front exhaust pipe with pre- and main catalytic converters
-
Bank 2
-
With decoupling element
-
Decoupling element must not be kinked more than 10 degrees, otherwise it may be damaged
-
Protect from hit- and impact stress
-
Individual mounting components, See Fig. 3.
-
Align exhaust system free of stress
14. Oxygen sensor - 55 Nm
-
Behind catalytic converter
-
Bank 2, sensor 2
15. Front clamping sleeve
-
Installation position, See Fig. 1.
-
Before tightening ensure exhaust system is tension-free
-
Tighten bolts evenly
16. 40 Nm
17. Front exhaust pipe with pre- and main catalytic converters
-
Bank 1
-
With decoupling element
-
Decoupling element must not be kinked more than 10 degrees, otherwise it may be damaged
-
Protect from hit- and impact stress
-
Individual mounting components, See Fig. 4.
-
Align exhaust system free of stress
18. Rear muffler
-
For left side of vehicle
-
Factory-installed with center muffler as one unit. If repair is necessary, replace separately
-
Align exhaust system free of stress
19. Transverse beam
20. Bolt
21. Support ring
-
Replace if damaged
22. 23 Nm
23. Rear muffler
-
For right side of vehicle
-
Factory-installed with center muffler as one unit. If repair is necessary, replace separately
-
Align exhaust system free of stress
24. 25 Nm
25. 40 Nm
26. Rear clamping sleeve
-
Used when center or rear muffler is replaced separately.
-
Installed position, See Fig. 2.
-
Before tightening ensure exhaust system is tension-free
-
Tighten bolts evenly
Fig. 1 Installed position of front double clamps
-
Install double clamps so that the bolt ends do not project over lower edge of double clamp.
-
Threaded connections face each other