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Fesser Coolant Evaporate?

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Mar 6, 2009
I haven't checked my coolant level in probably 3-4 months....

Noticed a slight higher temps when at idle (2-3 Degrees)

Went to blow it out and noticed that my coolant lines had air in them and my coolant was low on my Fill Port?

I have Fesser UV Blue coolant, does this stuff evaporate over time or something?

I have checked 1000 times and I have no leaks so this is the only thing I could come up with.

Thanks for the info!


Jan 29, 2009
yep wet stuff evaporates... funny ive just checked mine due to probe issues and something in my loops drunk an inch too :sly:

you loose it through the pipework.... no point sitting looking for it though ;)

(its late here and im feeling low on science high on stupidity :) )


Jun 13, 2007
top it up with distilled water.

when it comes time to clean your system (i go every 6 months) check to see what the feser crap has done to your loop. it may be clean but likely it's slightly stained the tubing and may have clogged the blocks.