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Checking with the cooling system testing deviceV.A.G 1274 B > < Checking the coolant system for leaktightness

Octavia Mk2

Checking with the cooling system testing deviceV.A.G 1274
Checking with the cooling system testing device -V.A.G 1274-
Special tools and workshop equipment required
t  Cooling system testing device, e.g. -V.A.G 1274-
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  Engine is at operating temperature.
Test sequence
  WARNING
Hot steam may escape when the coolant expansion reservoir is opened. Wear safety goggles and safety clothing, in order to avoid eye injuries and scalding. Cover the cap with a cloth and open carefully.
–  Open compensation bottle.
   
–  Position the cooling system testing device -V.A.G 1274- with adapter -V.A.G 1274/8 - on the coolant expansion reservoir.
–  Using the hand pump of the testing device generate an overpressure of approx. 0.1 MPa (1.0 bar).
If the pressure drops:
–  Search position of the leak and repair fault.
Testing the pressure relief valve in the cap
  S19-0236
–  Position the cooling system testing device -V.A.G 1274- with adapter -V.A.G 1274/9 - on the cap.
–  Operate the handpump.
l  The pressure relief valve should open at a pressure of 0.14...0.16 MPa (1.4...1.6 bar).
If the pressure relief valve does not open:
–  Replace cap.
  S19-0237

Checking with the cooling system testing deviceV.A.G 1274 B > < Checking the coolant system for leaktightness