Cooling System, Checking For Coolant Leaks: Notes

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Cooling System Tester V.A.G 1274
Adapter V.A.G 1274/8
Adapter V.A.G 1274/9

Pressure relief valve in cap, checking. Refer to PRESSURE RELIEF VALVE IN CAP, CHECKING .

Engine is at operating temperature.

Test Sequence:

WARNING:

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

-- Open the cap on the coolant expansion tank.

-- Install the cooling system tester V.A.G 1274 with the adapter V.A.G 1274/8 onto the 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 UNITED STATES, INC.

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

If the pressure drops:

-- Search for leaking areas and repair the malfunction.