I've had to top up the coolant level in the radiator expansion tank on
my Audi A2 today. The manual says it's important to maintain a 40% mix
of anti-freeze to water but that you can top up with plain water in a
emergency (which is what I did). How important is this ratio, and how
much liquid does the tank hold? I probably put about a litre into it,
and I don't want it to freeze with the cold weather coming up.
Initially it was a lot less than that. Then, in my haste, I drove off without
putting the cap back on. That's when it needed the 2nd top up. Obviously if it
goes down again I'll get it checked out.
Jonathan Morton wrote:
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