Cooling System, Checking For Coolant Leaks: Notes

WARNING: This page is about a different car, the 2006 Volkswagen Jetta and 2005 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Cooling system tester V.A.G 1274
Adapter for cooling system tester V.A.G 1274/8
Adapter for cooling system tester V.A.G 1274/9

Test Conditions

Engine at operating temperature

Test Sequence

WARNING:

Hot steam may escape when opening expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a rag and open very carefully.

-- Open cap of coolant expansion tank.

-- Position cooling system tester V.A.G 1274 with adapter V.A.G 1274/8 on expansion tank.

Fig 1: Positioning Cooling System Tester V.A.G 1274 With Adapter V.A.G 1274/8 On Expansion Tank

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Generate a positive pressure of approximately 1.0 bar using hand pump of tester.

If the pressure drops:

-- Search for leaking areas and repair the malfunction.