skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

ABOUT US
Charge air system with exhaust gas turbocharger > < Removing and installing pressure box for exhaust turbocharger

Octavia Mk2

Setting the pressure box for exhaust turbocharger (for engines with identification characters BZB, CDAA, CDAB)
Setting the pressure box for exhaust turbocharger (for engines with identification characters BZB, CDAA, CDAB)
Special tools and workshop equipment required
t  Universal dial gauge holder -MP 3-447 (VW 387)-
t  Hand vacuum pump, e.g. -VAS 6213-
t  Pressure control valve, e.g. -VAS 6342-
t  Turbocharger tester , e.g. -V.A.G 1397 A-
t  Dial gauge, e.g. -VAS 6341/1-
t  30 mm extension, e.g. -VAS 6341/3 -
t  Flat button, e.g. -VAS 6341/4-
  Note
t  This work sequence is only intended to set the pressure box. When checking already set pressure boxes, the values may differ.
t  The pressure unit must only be set if the linkage was detached.
t  The setting is performed on a removed exhaust turbocharger.
–  Remove exhaust turbocharger → Chapter.
   
–  Detach the hose -arrow- from the pressure unit at the exhaust turbocharger.
  A21-10121
–  Remove lock washer -1- above the linkage of the pressure box at turbocharger.
  A21-10204
–  Release counternut -2 -.
  A21-10124
–  Pre-set the bypass flap -1- above the linkage of the pressure unit -arrow- in such a way that the bypass flap can still be turned manually in its position.
–  Tighten the counternut by hand.
  A21-10122
–  Fit together the hand vacuum pump -VAS 6213-, the turbocharger tester -V.A.G 1397 A- with connection II and the pressure control valve -VAS 6342- as shown in the figure.
–  Connect the pressure control valve -VAS 6342- at lever -1-.
  A21-10120
–  Put sliding ring -1- of hand vacuum pump -VAS 6213- in position -B- for “pressure”.
–  Switch on the turbocharger tester -V.A.G 1397A- and position the sliding switch to position II.
  N24-10282
–  Attach universal dial gauge holder -MP 3-447- to exhaust turbocharger -arrow-.
–  Attach the dial gauge -VAS 6341/1- with 30 mm extension -VAS 6341/3- and flat button -VAS 6341/4- at universal dial gauge holder -MP 3-447-.
–  At 0°MPa (0°bar) set the dial gauge -VAS 6341/1- to 1 mm preload.
–  Turn the readout of the dial gauge -VAS 6341/1- to 0 (zero).
–  Test the smooth operation of the dial gauge.
–  Operate the hand vacuum pump -VAS 6213- until the turbocharger tester -V.A.G 1397 A- displays 0.046 MPa ± 0.0005 MPa (460 mbar ± 5 mbar).
–  The dial gauge must indicate 4.1...4.3 mm, otherwise turn the linkage of the pressure unit until the value is indicated.
  Note
The mm details relate to the read off value (containing 1 mm preload).
–  Tighten the counternut by hand.
–  Repeat measurement.
–  Release the pressure via the pressure control valve -VAS 6342- to 0 MPa (0 bar).
–  Position dial gauge -VAS 6341/1- to 0 (zero).
  Note
t  Observe the sequence of the following measurements.
t  In-between the pressure must not be released to 0 MPa (0 bar).
–  Operate the hand vacuum pump -VAS 6213- until the turbocharger tester -V.A.G 1397 A- displays 0.046 MPa ± 0.0005 MPa (460 mbar ± 5 mbar).
–  Read off value on the dial gauge -VAS 6341/1- (value 1) and note.
–  Operate the hand vacuum pump -VAS 6213- until the turbocharger tester -V.A.G 1397 A- displays 0.065 MPa to 0.070 MPa (650 mbar to 700 mbar).
–  Release the pressure via the pressure control valve -VAS 6342- to 0.046 MPa ± 0.0005 MPa (460 mbar ± 5 mbar).
–  Read off value on the dial gauge -VAS 6341/1- (value 2) and note.
–  Add value 1 and 2 together and divide by 2.
l  The result (mean value) must be 5 ± 0.25 mm.
If the result (mean value) is not 5 ± 0.25 mm:
–  Adjust the setting, tighten the counternut by hand and repeat measurement.
If the result (mean value) is 5 ± 0.25 mm:
–  Tighten counternut to 9 Nm and secure with seal paint → electronic catalogue of original parts.
  S21-0089
–  Attach lock washer -1- above the linkage of the pressure box to turbocharger.
  A21-10204

Charge air system with exhaust gas turbocharger > < Removing and installing pressure box for exhaust turbocharger