Self-test of cooling system tester - V.A.G 1274 B-
– Operate cooling system tester - V.A.G 1274 B- several times.
– Build up a pressure of 3.0 bar on cooling system tester .
– Observe pressure on pressure gauge of cooling system tester
for 30 seconds.
If no pressure builds up or if the pressure drops again:
The cooling system tester - V.A.G 1274 B- is leaking and should
not be used.
Checking cooling system for leaks
• Engine at operating temperature.
WARNING
The cooling system is under pressure when the engine is hot!
Danger of scalding due to steam and hot coolant.
Cover filler cap on expansion tank with a cloth and open care‐
fully to release pressure.
– Open cap -1- on coolant expansion tank.
CC 2012 ➤ , Passat 2011 ➤ , Passat Variant 2011 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 06.2019
1. Cooling system/coolant
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