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Removing and installing air mass meterG70 > < Removing and installing air filter element

A4 Mk3

Removing and installing air cleaner (bottom section)
Removing and installing air cleaner (bottom section)
   
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-.
–  Remove air duct -3-.
  A24-10827
–  Detach vacuum hose -arrow- (if fitted).
  A24-10830
–  Release retainer -4- for bottom section of air cleaner (press in rubber on left and right side and pull upwards).
  Note
t  The air filter bypass flap valve -N275--item 1- is not installed on all equipment versions / country-specific versions.
t  Do not use lubricant when installing retainer.
–  Unplug electrical connector at air filter bypass flap valve -N275- (if fitted).
–  Carefully take out complete air cleaner housing.
Installing
To ensure the proper function of the air mass meter -G70- it is important to observe the following instructions.
  Note
t  The air cleaner housing MUST be clean.
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  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.
  A24-10827
–  If warm air intake hose is fitted (for countries with cold climates only), make sure that air intake connection has engaged properly -arrows- (pay attention to markings).
–  Check water drain hose -1- in air cleaner (bottom section) for dirt and other obstructions (clean if necessary).
–  Clean salt residue, dirt and leaves out of air cleaner housing (top and bottom sections); use a vacuum cleaner if necessary.
–  Check for salt residue, dirt and leaves in air hose (engine intake side).
–  Check for dirt and leaves in air duct going from lock carrier to air cleaner housing.
–  Plug electrical connector at air filter bypass flap valve -N275- in again (if fitted).
–  Re-install air cleaner (bottom section).
  Note
The water drain hose must be routed straight downwards and must not be kinked.
  A24-10506
–  Slide vacuum hose -3- (if fitted) back onto connection of air filter bypass flap valve -N275--item 1-.
–  Ensure secure fit of air hose at air mass meter -G70-.
The remaining installation steps are carried out in the reverse sequence.
  A24-10596

Removing and installing air mass meterG70 > < Removing and installing air filter element