I had to replace my overflow tank a few months ago. It has a sloooow leak around the neck (where the cap fastens to).
Once you pressurize it, you ought to hear it fairly quickly (unless there's a guy with a jackhammer next to you)

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D