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Removing and installing air cleaner (bottom section) > < Removing and installing engine cover panel

A4 Mk3

Removing and installing air filter element
Removing and installing air filter element
   
Removing
–  Unplug electrical connector -1- at air mass meter -G70-.
–  Release hose clip -2- securing air hose (going to turbocharger) and disconnect hose from air mass meter -G70-.
–  Unscrew bolts -arrows- and detach air cleaner (top section).
–  Take out old filter element.
Installing
l  Tightening torque → Chapter „Air cleaner - exploded view“
To ensure that the air mass meter -G70- functions properly, it is important to observe the following notes and instructions.
  Note
t  If the air filter element is very dirty or wet, dirt or water could reach the air mass meter and affect the air mass value. This would lead to loss of power, since a smaller injection quantity is calculated.
t  Always use genuine part for air filter element.
t  The air cleaner housing MUST be clean.
t  Hose connections and air pipes and hoses must be free of oil and grease before assembly.
t  Use a silicone-free lubricant when installing the air hoses.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue.
t  To prevent malfunctions, cover critical parts of the engine air intake (air mass meter, air pipes, etc.) with a clean cloth when blowing out the air cleaner housing with compressed air.
t  Observe environmental requirements for disposal.
  A24-10827
–  Clean salt residue, dirt and leaves out of air cleaner housing (top and bottom sections) using a vacuum cleaner.
–  Blow out water drain -arrow- with compressed air.
–  Check for salt residue, dirt and leaves in air mass meter and air intake hose (engine intake side).
–  Check for dirt and leaves in air duct going from lock carrier to air cleaner housing.
–  When installing air filter element, check that it is properly centred in retainer in air cleaner (bottom section).
–  Fit the top section of the air cleaner carefully on the bottom section, without using force. Make sure the top section of the air cleaner is fitted straight on the air filter element (note position of sealing lip on air filter element).
–  Ensure secure fit of intake hose at air mass meter -G70-.
The remaining installation steps are carried out in the reverse sequence.
  A24-10596

Removing and installing air cleaner (bottom section) > < Removing and installing engine cover panel