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Old 25th February 2021, 19:43   #17
T-Cut
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Rover75 and Mreg Corsa.

Join Date: Nov 2006
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Quote:
Originally Posted by Ravinder View Post
I’ve just poured another two 750ml bottles of water into the bottle just enough to cover the fins inside the bottle.
If you literally submerged the fins, that's generally regarded as way over full. The official 'Full' mark is the floor level at the base of the fins. A millimetre or ten above that makes little difference, but a coolant level above the fins leaves little space for expansion during warm up to running temperature. I guess it's useful for the checking leakage rate when standing unused. However, it may be lower after driving simply because thermal expansion may force some coolant out via the pressure cap. That would be a false positive leak detection.



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