audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Exhaust turbocharger, G-charger > < Removing and installing radiator
4-cyl. Diesel Direct Injection Engine (TDI), Mech. Components
Removing and installing parts of the cooling system
Checking cooling system for leaks
 
G19-0002

Special tools and workshop equipment required

  • ◆ V.A.G 1274
  • ◆ V.A.G 1274/8
  • ◆ V.A.G 1274/9

Test requirements:

  • ● Engine at operating temperature.

Test sequence

Important
Hot steam or hot coolant can escape when opening expansion tank. Cover cap with a cloth and open carefully.
  • ‒ Open the cover of the coolant expansion tank
 
A19-0036
  • ‒ → Fit tester V.A.G 1274 with adapter V.A.G 1274/8 onto expansion tank.
  • ‒ Using hand pump on tester, build up a pressure of approx. 1.0 bar.
  • ‒ If this pressure is not maintained, locate and rectify leaks.
 
A19-0055

Testing pressure relief valve in filler cap.

  • ‒ → Fit tester V.A.G 1274 with adapter V.A.G 1274/9 onto sealing cap.
  • ‒ Operate hand pump.
    • ‒ The pressure relief valve should open at a pressure of 1.2 ... 1.5 bar.

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