> If You have air in the expansion tank, the tank cap doesn't work. > If the water volume extends, the air on the top of the expansion > tank will be pressed through the cap and the small hose into the > refill tank. While cooling down, water is sucked in reverse > direction. In this way, the expansion tank must always be total filled. > If not, cap must be replaced and/or the cooling system has a > leak, where air is sucked while cooling down. > > I had these problems to and VW wasn't able to fix it. The > description of the tank caps function is wrong in Bentley. But I don't have air in my tank now. It's all been replaced with coolant. There was less air after each filling/driving session. Now my cooling system is working fine. Bryan |
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