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Octavia Mk2

Checking the charge-air system for leaktightness
Checking the charge-air system for leaktightness
Special tools and workshop equipment required
t  Charge-air system testing device, e. g. -V.A.G 1687-
t  Adapter, e.g. -V.A.G 1687/5-
t  Ultrasonic measuring device e. g. -V.A.G 1842-
–  Remove the sound dampening system → Body Work; Rep. Gr.50.
   
–  Release the clasp -A- and pull off the hose -B- from the charge air pipe.
  N21-10041
–  Mount the adapter -V.A.G 1687/5- onto the charge air hose -A- and turn it to approx. 90° -B-.
Prepare tester for charge air system -V.A.G 1687- as follows:
  N21-10039
–  Unscrew pressure control valve -2- fully and close the valves -3- and -4-.
  Note
The rotary knob must be pulled to the top in order to rotate the pressure control valve -2-.
  V21-0168
–  Connect tester for charge air system -V.A.G 1687-, as shown.
  N21-10040
–  Connect the pneumatic hose -1- (pneumatic support) at tester for charge air system -V.A.G 1687-.
  Note
If there is water in the inspection glass, drain water via the drain plug -6-.
–  Open valve -3-.
–  Set the pressure to 0.05 MPa (0.5 bar) with the pressure control valve -2-.
  Caution
The pressure must not be greater than 0.05 MPa (0.5 bar)! A too high pressure can damage the engine.
–  Open valve -4- and wait until the test circuit is filled. If necessary regulate the pressure to 0.05 MPa (0.5 bar).
–  Listen to, touch or use commercially available leak search spray or the ultrasonic measuring device -V.A.G 1842- to check the charge-air system for leak points.
  Note
t  A small amount of air escapes via the valves into the engine. For this reason no pressure test is possible.
t  Use of ultrasonic measuring device -V.A.G 1842- → operating instructions.
t  Before removing the adapter, depressurize the test circuit by detaching the coupling from the adapter -V.A.G 1687/5-.
t  Hose connections and hoses of the charge air system must be free of oil and grease before being installed.
  V21-0168

Mixture preparation system, electronic inj.,Gas > < Overview plan for the exhaust turbocharging