Audi Workshop Service and Repair Manuals

Removing and installing exhaust manifold

Removing –  Lift off engine cover -arrows-.

–  If fitted, detach cover -1- on right of engine compartment.

–  Disengage activated charcoal filter solenoid valve 1 -N80--item 1- at air duct. –  Remove bolts -arrows-. –  Remove air duct -2-.

–  Disconnect air pipes -1- and -2-.

–  Unplug electrical connector -1- at air mass meter -G70-. –  Disconnect hose -2-, if fitted. –  Remove fastener -3- and detach air cleaner housing.

–  Unscrew bolt connections at catalytic converter/exhaust manifold -arrows-.   Note Unscrew nuts from catalytic converter side.

–  Vehicles with auxiliary heater: remove bolts -arrows- securing exhaust pipe for auxiliary/additional heater to noise insulation.

–  Release quick-release fasteners -1- and -2- and take off front noise insulation. –  If fitted, open quick-release fasteners -3- and remove rear noise insulation.

–  Unscrew nut -arrow- at bracket for front exhaust pipe.   Note

To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°. –  Separate exhaust system at clamp -arrows-. –  Detach catalytic converter from exhaust manifold.

–  Unscrew all nuts -arrows- on exhaust manifold. –  Detach exhaust manifold. Installing Installation is carried out in the reverse order; note the following:   Note Renew gaskets and self-locking nuts. –  Install front exhaust pipe together with catalytic converter → Chapter. –  Align exhaust system so it is free of stress → Chapter. Tightening torques

Component	Nm
Exhaust manifold to cylinder head	25 → Remark → Remark

1)  Renew self-locking nuts. 2)  Coat thread and contact surface of bolt head with high-temperature paste; → Parts catalogue