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Fuel supply, gas operation > < Inspecting coolant system with cooling system testing device V.A.G 1274 for tightness

Octavia Mk2

Inspecting coolant system with cooling system testing deviceV.A.G 1274 B for tightness
Inspecting coolant system with cooling system testing device -V.A.G 1274 B- for tightness
Special tools and workshop equipment required
t  Cooling system testing device, e.g. -V.A.G 1274 B-
t  Adapter for cooling system testing device, e.g. -V.A.G 1274/8-
t  Adapter for cooling system testing device, e.g. -V.A.G 1274/9-
Test condition
l  The engine is at operating temperature.
Test sequence
  WARNING
Hot steam may escape when the compensation bottle is opened.
t  Wear safety goggles and safety clothing, in order to avoid eye injuries and scalding.
t  Cover the cap with a cloth and open carefully.
–  Open compensation bottle.
–  Screw the adapter for cooling system testing device -V.A.G 1274/8- into the coolant expansion bottle.
–  Clamp the connecting piece -V.A.G 1274 B/1- in the adapter for cooling system testing device -V.A.G 1274/8-.
   
–  Connect the connecting piece -V.A.G 1274 B/1- via the delivered connecting hose to the cooling system testing device -V.A.G 1274 B-.
–  Using the hand pump of the testing device generate an overpressure of approx. 0.1 MPa (1.0 bar).
  WARNING
Risk of burning!
t  Before the cooling system testing device -V.A.G 1274 B- is separated from the connecting hose or the connecting piece -V.A.G 1274 B/1-, the existing pressure must absolutely be released.
t  For this step, press the pressure relief valve on the cooling system testing device -V.A.G 1274 B- and hold it pressed until the pressure gauge indicates the value “0”.
If the pressure drops:
–  Determine position of the leak and repair fault.
Testing the pressure relief valve in the cap
–  Screw the screw cap into the adapter for cooling system testing device -V.A.G 1274/9-.
–  Clamp the connecting piece -V.A.G 1274 B/1- in the adapter for cooling system testing device -V.A.G 1274/9-.
  A19-10645
–  Connect the connecting piece -V.A.G 1274 B/1- via the delivered connecting hose to the cooling system testing device -V.A.G 1274 B-.
–  Operate the handpump.
l  The pressure relief valve should open at a pressure of 0.14...0.16 MPa (1.4...1.6 bar).
The pressure relief valve opens too early or too late.
–  Replace cap.
  A19-10748

Fuel supply, gas operation > < Inspecting coolant system with cooling system testing device V.A.G 1274 for tightness