Audi A6 - Upper Intake Manifold

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– Disconnect vacuum line -1-.
– Remove pin from spreader clips -3-.
– Remove lower part of air filter housing and, on backside, dis‐
connect electrical connection -2- at intake air switch-over
valve -N335- .
Installing
Note
♦ Always use an original equipment air filter element.
♦ Hose connections and hoses in intake area must be free of oil
and grease before installing. When installing, do not use any
lubricants containing silicone.
♦ Air filter housing must always be clean.
♦ Secure all hose connections using hose clamps appropriate
for model type ⇒ Parts catalog .
♦ Note the following when blowing out air filter housing with
compressed air: To prevent malfunctions, cover critical air flow
engine components such as air duct pipes, etc. with a clean
cloth.
♦ Observe disposal regulations!
– Check water drain hose in lower part of air filter for dirt and
contamination (clean if necessary).
– Clean air filter housing (upper and lower sections) of salt res‐
idue, dirt or leaves (use vacuum cleaner if necessary).
– Check air duct hose (clean air side) for salt residue, dirt and
leaves.
– Check intake ducting up to air filter element for dirt.
– Make sure that air filter element is properly centered when
placed into mounting of lower part of air filter housing.
– Set upper part of air filter housing onto lower part of air filter
housing, without using much force. When doing this, make
sure that the upper part of air filter housing is not placed
crooked onto air filter element. Pay attention to sealing lip of
air filter element (false air).
– Then attach upper part of air filter housing to lower part.
– Further installation is in reverse order of removal.
5.2 Upper Intake Manifold
Removing
Note
All cable ties which are opened or cut open when removing, must
be replaced in the same position when installing.
Audi A6 2005 ➤
Fuel Injection and Ignition - Edition 03.2008
5. Removal and Installation 29