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Introduction

'''Tutorial made on Audi A3 II - 2.0TDi 140ch (year 2005).

Often the cause of coolant loss.'''

  1. 
removing the air filter remove the screws with the star screwdriver
    • removing the air filter remove the screws with the star screwdriver

  2. 
removing the filter and cover

with the key unscrew the screw to unclip the block do not forget to unclip the air hose with a flat screwdriver

with the key unscrew the screw to unclip the block do not forget to unclip the air hose with a flat screwdriver
    • removing the filter and cover

    • with the key unscrew the screw to unclip the block do not forget to unclip the air hose with a flat screwdriver

  3. 
unscrew the nuts on the EGR valve to be able to lower the pipe after having of course unscrewed the screw on the temperature flange.

using the multiple pliers or a clamp pliers, detach the hoses from the flange and disconnect the temperature sensor plug. CAUTION: carry out this operation when the engine is cold and protect the ground with a tray to drain the coolant.

unscrew the first nut by 10 with an extended socket wrench to be able to lower the EGR valve pipe a little to access the second nut
    • unscrew the nuts on the EGR valve to be able to lower the pipe after having of course unscrewed the screw on the temperature flange.

    • using the multiple pliers or a clamp pliers, detach the hoses from the flange and disconnect the temperature sensor plug. CAUTION: carry out this operation when the engine is cold and protect the ground with a tray to drain the coolant.

    • unscrew the first nut by 10 with an extended socket wrench to be able to lower the EGR valve pipe a little to access the second nut

  4. 
removal of the flange we can clearly see the leak problem. flange broken at seal level

CLEANING before installing the new temperature probe flange which is in better condition in the image. Don't forget to put the O-ring with a little grease so that it stays in the housing in the event that your flange is not supplied with it.

CLEANING before installing the new temperature probe flange which is in better condition in the image. Don't forget to put the O-ring with a little grease so that it stays in the housing in the event that your flange is not supplied with it.
    • removal of the flange we can clearly see the leak problem. flange broken at seal level

    • CLEANING before installing the new temperature probe flange which is in better condition in the image. Don't forget to put the O-ring with a little grease so that it stays in the housing in the event that your flange is not supplied with it.

  5. 
install the new flange, tighten the nuts, reconnect the hoses before filling with coolant
    • install the new flange, tighten the nuts, reconnect the hoses before filling with coolant

    • for the purge it is automatic so fill halfway, start the vehicle and wait for the liquid to go down

    • put the heating on full blast hot air redo the level and check that the fan is working

Finish Line

2 other people completed this guide.

ross coach

Member since: 10/29/2017

28 Reputation

3 Guides authored

3 Comments

Attention au filletage de la culasse qui est fragile quand on revisse les deux écrous donc le couple de force de vissage est important à savoir

manupro34 - Reply

Hello, thank you for this tutorial, do you know what the tightening torque is for the two screws on the flange?

simondarse - Reply

Hello

for the tightening torque.

I do them with a socket wrench without forcing too much.

It is not necessary to tighten too much, especially since there is an O-ring.

so be careful not to break the bridle by forcing it too much.

ross coach -

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