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Turbocharger > < Removing and installing charge pressure senderG31

A5

Checking charge air system for leaks
Checking charge air system for leaks
Special tools and workshop equipment required
   
t  Charge air system tester -V.A.G 1687-
–  Remove noise insulation → Rep. gr.66.
  W00-10327
–  Open hose clip -arrow-, detach air hose and swivel to side.
  A10-10995
–  Depending on hose diameter, insert adapter -1687/10-, -1687/11- or -1687/12- into air hose -1- and secure with hose clip.
–  Connect charge air system tester -V.A.G 1687- as shown on illustration.
  A21-10178
Prepare charge air system tester -V.A.G 1687- as follows:
–  Unscrew pressure control valve -2- completely and close valves -3- and -4-.
  Note
Make sure knob is pulled out before turning pressure control valve -2-.
  V21-0168
–  Using a commercially available connection piece, connect charge air system tester -V.A.G 1687- to compressed air -1-.
  Note
If there is water in sight glass, remove drain plug -6- and drain water.
–  Open valve -3-.
  Caution
Risk of damage if pressure is set too high.
The pressure must not exceed 0.5 bar.
–  Adjust pressure to 0.5 bar via pressure control valve -2-.
–  Open valve -4- and wait until test system is pressurised. If necessary, adjust pressure to 0.5 bar again.
–  Check charge air system for audible leaks or leaks that can be felt with the hand; apply commercially available leak detecting spray or use ultrasonic tester -V.A.G 1842-.
  Note
t  A small amount of air escapes through the valves and enters the engine. Therefore it is not possible to perform a pressure retention test.
t  Operation of ultrasonic tester -V.A.G 1842- → Operating instructions.
t  Release pressure in test circuit by detaching coupling from adapter before removing adapter.
t  Hose connections and air pipes and hoses must be free of oil and grease before assembly.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue.
t  To secure the air hoses properly at their connections, spray rust remover onto the worm thread of the used hose clips before installing.
  V21-0168

Turbocharger > < Removing and installing charge pressure senderG31