Audi TT - Page 149

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Disconnect electrical connector -3- on Mass Air Flow (MAF)
Sensor -G70- .
– Open spring clips -1- and -2- and remove air guide hose from
mass airflow sensor.
– Remove the air intake from lock carrier -4-.
– Remove engine cover.
Components, that must be removed on 5 cylinder engines
– Remove the air guide pipe (from the air filter to the turbo‐
charger). Refer to ⇒ Fuel Injection and Ignition System; Rep.
Gr. 24 ; Removal and Installation .
Components, that must be removed on 6 cylinder vehicles
Note
The following describes removal and installation on a 3.2L MPI
vehicle. The procedure may be different on other 6 cylinder ve‐
hicles.
– Remove vacuum hose to brake booster -arrow-.
Procedure continued for all vehicles
– Remove components that block access to the coolant hoses
-A- and -B- in engine compartment. Refer to ⇒ Engine Me‐
chanical; Rep. Gr. 13 ; Removal and Installation .
Note
Depending on the engine and version of the vehicle, it may be
necessary to loosen or remove the following components: upper
engine cover, pressurized air pipe to throttle valve part, for coolant
hose and expansion valve connection area heat shield, etc.).
– Mark the arrangement of coolant hoses -A- (supply to cylinder
head) and -B- (return to coolant pump).
Note
♦ The heater core is designed for a specific coolant flow direc‐
tion. Therefore, coolant hoses must be connected on the
correct sides.
♦ Bleed the coolant circuit. Refer to ⇒ Engine Mechanical; Rep.
Gr. 13 ; General Information .
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
5. Removal and Installation 145