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Fuel rail with injection valves - Summary of components > < Removing and installing intake manifold

Octavia Mk2

Check vacuum reservoir in the intake manifold for tightness
Check vacuum reservoir in the intake manifold for tightness
Special tools and workshop equipment required
t  Hand vacuum pump, e.g. -VAS 6213- or -V.A.G 1390-
Test condition
l  Intake manifold undamaged and vacuum hoses correctly fitted on.
Test sequence
–  Remove engine cover with air filter → Chapter.
   
–  Detach the vacuum hose -arrow- from the intake manifold flap valve -N316- to intake manifold at intake manifold.
  N24-10141
–  Connect the hand vacuum pump -VAS 6213 - to the intake manifold.
–  Position the sliding ring -1- of the hand vacuum pump -VAS 6213- in the -direction of arrow- for “vacuum”.
–  Operate the hand vacuum pump, until an overpressure of 0.03 MPa (0.3 bar) is achieved on the gauge.
  Note
As a result of the large volume in the vacuum reservoir up to 20 strokes are necessary, in order to generate a negative pressure of 0.03 MPa (0.3 bar).
–  Observe the pressure approx. 3 ... 5 minutes.
If the negative pressure remains at 0.03 MPa (0.3 bar):
   The vacuum reservoir in the intake manifold is O.K.
If the vacuum drops:
–  Replace intake manifold → Chapter.
  S24-0725

Fuel rail with injection valves - Summary of components > < Removing and installing intake manifold