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– Fit cooling system tester - V.A.G 1274 B- with adapter -
V.A.G 1274/8- to coolant expansion tank.
– Build up pressure of approx. 1.0 bar using hand pump of cool‐
ing system tester.
– Observe coolant level in expansion tank.
Caution
If there are no leaks in the cooling system, it is only permissible
for the coolant level to fall by a maximum of 25 mm. A consid‐
erably larger drop in the coolant level or evaporation of the
coolant from the expansion tank suggests that there is an air
bubble in the cooling system.
Coolant level OK:
– Perform road test until operating temperature of engine is
reached.
– Check coolant level again.
Coolant level drops considerably:
– Drain cooling system ⇒ page 155 .
– Repeat cooling system filling process ⇒ page 158
– Check coolant for air bubbles ⇒ page 161
4.6 Checking cooling system for leaks
Special tools and workshop equipment required
♦ Cooling system tester - V.A.G 1274 B-
♦ Adapter for cooling system tester - V.A.G 1274/8-
Touareg 2010 ➤ , Touareg 2015 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 12.2019
162 Rep. gr.19 - Cooling
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