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Charge-air system with exhaust gas turbocharger - Part 2 > < Connection diagram for vacuum hoses for engine with identification characters BLS

Octavia Mk2

Inspecting vacuum setting element and tension rods for charge pressure control (Superb II, Octavia II)
Inspecting vacuum setting element and tension rods for charge pressure control (Superb II, Octavia II)
Special tools and workshop equipment required
t  Hand vacuum pump with accessories e.g. -V.A.G 1390- or Hand vacuum pump, e.g. -VAS 6213-
t  Turbocharger tester , e.g. -V.A.G 1397 A-
Faults at tension rods or at vacuum setting element of charge pressure control lead to the following faults:
t  Specified values for charge pressure are not reached.
t  Poor performance.
t  Irregular performance in the partial load region.
t  Engine jerk in change-over.
–  Check vacuum piping for tightness and completeness Superb II → Chapter, Octavia II → Chapter.
Test sequence
   
–  Lift the engine cover at the sides -arrows 1- and pull out towards the front -arrow 2-.
  S10-0209
–  Connect hand vacuum pump and turbocharger tester with auxiliary hoses as shown. Fit test hose onto the connection fitting -I- and put the band switch of the unit into the position -I- (absolute pressure).
–  Generate vacuum with the hand vacuum pump.
  A21-0195
–  Read off vacuum value at turbocharger tester -V.A.G 1397 A- and at the same time observe tension rod of exhaust turbocharger:
  Note
For the inspection use a mirror.
l  Specified value: 50 ...120 mbar (0.005…0.012 MPa): the tension rod must move up.
l  Specified value: 550...620 mbar (0.055…0.062 MPa): the tension rod must be positioned at the top up to the stop.
  Note
The absolute pressure indicated on the turbocharger tester -V.A.G 1397 A- must decrease to the stated specified values.
–  Ventilate hand vacuum pump.
l  The tension rod must move down.
  Note
Check tension rod movement over the entire adjustment range: The tension rod must move without jolting.
If the specified values are not achieved or the tension rod moves in jolts:
–  Replace exhaust gas turbocharger → Chapter, Octavia II → Chapter.
  A23-0150

Charge-air system with exhaust gas turbocharger - Part 2 > < Connection diagram for vacuum hoses for engine with identification characters BLS