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Exhaust turbocharger, G-charger > < Removing and installing radiator

A3 Mk1

Checking cooling system for leaks
   
Checking cooling system for leaks
Special tools and workshop equipment required
t  Cooling system tester -V.A.G 1274-
t  Adapter for cooling system tester -V.A.G 1274/8-
t  Adapter for cooling system tester -V.A.G 1274/9-

Procedure
l  Engine must be warm.
  WARNING
Hot steam or hot coolant can escape when expansion tank is opened; cover filler cap with cloth and open carefully.
–  Open filler cap on coolant expansion tank.
   
–  Attach cooling system tester -V.A.G 1274- with adapter -V.A.G 1274/8- to expansion tank.
–  Use hand pump on cooling system tester to create a pressure of approx. 1.0 bar.
If the pressure drops:
–  Locate leak and eliminate fault.
  A19-0036
Checking pressure relief valve in filler cap
–  Attach cooling system tester -V.A.G 1274- with adapter -V.A.G 1274/9- to filler cap.
–  Use hand pump on cooling system tester to create pressure.
l  The pressure relief valve should open at a pressure of 1.4 ... 1.6 bar.
If the pressure relief valve does not open as described:
–  Renew filler cap.
  A19-0055

Exhaust turbocharger, G-charger > < Removing and installing radiator