Audi Workshop Service and Repair Manuals

Removing and installing particulate filter Special tools and workshop equipment required

t  Engine support -3300 A-

Removing –  Lift off engine cover panel (outside -1- and inside -2-) by pulling up evenly.

–  Unclip change-over valve for exhaust gas recirculation cooler -N345--item 2- from bracket. –  Unplug electrical connector -1- and move wiring clear. –  Remove bolts -arrows-.   Note Disregard -items 3, 4, 5 and 6-.

–  Unplug electrical connector -4- for Lambda probe -G39- and move Lambda probe wiring clear.   Note Disregard -items 1, 2, 3 and 5-.

–  Unscrew Lambda probe -3- → Rep. Gr.23. –  Remove temperature sender before particulate filter -G506--item 5-. –  Unbolt bracket -2- for pressure pipes. –  Detach pressure pipe -4- at particulate filter. –  Slacken and remove retaining clamp -1- for particulate filter.

–  Remove centre noise insulation -fasteners 1 ... 3-.

–  Unscrew temperature sender after particulate filter -G527--item 1- from exhaust pipe behind particulate filter. –  Unscrew pressure pipe -2- going to exhaust gas pressure sensor 1 -G450-. –  Remove exhaust gas pressure sensor 1 -G450- together with pressure pipes.

–  Unbolt heat shield for drive shaft (right-side) -arrows-. –  Unbolt drive shaft (right-side) from gearbox flange. –  Push drive shaft (right-side) towards front of vehicle.

–  Unscrew bolts -2- and -3- for pendulum support.   Note Disregard -item 1-.

–  Remove nuts -1- and -3- and bolt -2- and detach bracket for particulate filter.

–  Using engine support -3300 A-, push engine/gearbox assembly forwards by distance -a-. l  Dimension -a- = 35 mm.

–  Remove front cross-piece for underbody -arrows-.   Note To avoid damage, the flexible joints in the front exhaust pipe must not be bent more than 10°. –  Loosen nuts on clamp -1-.

–  Unbolt bracket for exhaust system -arrows-.

–  Remove particulate filter by rotating through 180° and about its own axis. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew gaskets and self-locking nuts. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. t  Fit all cable ties in the original positions when installing. –  Install temperature sender after particulate filter -G527- → Chapter. –  Install Lambda probe -G39- → Rep. Gr.23. –  Install temperature sender before particulate filter -G506- → Chapter. –  Install exhaust gas pressure sensor 1 -G450- → Rep. Gr.23. –  Install drive shaft → Rep. Gr.40. –  Align exhaust system so it is free of stress → Chapter. –  After renewing particulate filter, perform adaption in “Guided Functions” → Vehicle diagnosis, testing and information system VAS 5051 Tightening torques

Component	Nm
Bracket for exhaust system to subframe	23
Front exhaust pipe to turbocharger	7
Bracket for particulate filter to particulate filter	23
Pendulum support to gearbox	Manual gearbox → Rep. Gr.34, automatic gearbox → Rep. Gr.37
Heat shield to cylinder block	35
Underbody cross member (front) to body	23
Pressure pipe to particulate filter	40
l  1) Renew bolts. l  2) 90° = one quarter turn.