Audi Workshop Service and Repair Manuals > A4 Mk3 > Power unit | 6-cylinder direct petrol injection engine with supercharger (3.0 ltr. 4-valve), mechanics | Exhaust system | Secondary air system | Removing and installing combination valve for secondary air system (right-side)

Removing and installing combination valve for secondary air system (right-side)

Removing

Note

Fit all cable ties in the original positions when installing.

–	Remove front silencer (right-side) → Chapter.

–	Remove plenum chamber partition panel → Rep. gr.50.

–	Take electrical connector -1- for Lambda probe after catalytic converter -G130- out of bracket, unplug and move wiring clear.

Note

Disregard items marked -2, 3-.

–	Remove bolt -1- and nuts -arrows-, detach catalytic converter (right-side) from exhaust manifold and move to rear.

–	Remove bolts -arrows- and detach heat shield -1-.

–	Detach vacuum hose -2- from combination valve for secondary air system.

–	Remove bolts -3- and detach combination valve (right-side) for secondary air system and bolts -1- for secondary air hose.

Installing

Installation is carried out in the reverse order; note the following:

Tightening torques

l	→ Chapter „Secondary air system - exploded view“.

l	→ Fig. „„Heat shield for combination valve for secondary air system - tightening torque““.

Note

t	Renew gasket.

t	Hose connections and air pipes and hoses must be free of oil and grease before assembly.

t	Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue.

t	To secure the air hoses at their connections, spray rust remover onto the worm thread of the used hose clips before installing.

–	Install catalytic converter (right-side) → Chapter.

–	Install plenum chamber partition panel → Rep. gr.50.

–	Install front silencer → Chapter.

Audi Workshop Service and Repair Manuals