Audi Workshop Service and Repair Manuals

Removing

Notes:

• ◆ Renew seals, gaskets and self-locking nuts.
• ◆ The flexible pipe connection (de-coupling element) in the front exhaust pipe must not be bent more than 10 °- otherwise it can be damaged.

• ‒ → Unplug connectors -2- and -3- at air mass meter and ACF valve.
• ‒ Pull ACF valve -1- off air cleaner housing.
• ‒ Loosen bolt -arrow- and remove air cleaner housing together with air duct -4-.

• ‒ → Unbolt coolant expansion tank -2- (-arrows-).
• ‒ Unplug wiring for coolant shortage indicator switch -F66 and move expansion tank clear to one side.

Note:

Coolant hoses -1- and -3- do not have to be disconnected.

• ‒ → Unplug connector -arrow- for lambda probe and move wiring clear.

• ‒ → Remove noise insulation -arrows-.
• ‒ Unscrew bolts accessible from below securing front exhaust pipe to exhaust manifold.

• ‒ → Unscrew lambda probe.
• ‒ Unbolt front exhaust pipe -7- from exhaust manifold -5- and push it a short distance towards rear of vehicle.
• ‒ Unbolt exhaust manifold from cylinder head.

Installing

Installation is carried out in the reverse order, when doing this note the following:

• ‒ → Renew exhaust manifold gaskets -2- and -6-.
• ‒ Renew self-locking nuts -4- and -8-.
• ‒ Fit washers -3- under nuts -4-.
• ‒ Grease only the threads of the lambda probe with high-temperature lubricant "G 052 112 A3"; the lubricant must not get into the slots on the probe body.
• ‒ Aligning exhaust system free of stress =>
  Page 26-12.

Tightening torques