Thanks for this.scirocco_ne wrote: ↑Fri Feb 08, 2019 3:08 pmI would say start with the cheapest possibility and work through based on peoples advice. The o ring sounds a good shout.
My old 205 gti used to use water but run fine. I was convinced it had issues but my Dad strongly. disagreed as it ran ok.
On frosty/real cold days i always noticed more of a steam cloud out the rear (maybe twice the size but not obvious) on idle than other cars but that was the only thing to notice and i assumed it was the full stainless system causing more condensation.
One day it finally starting powering through water and i limped it home with 10l i was carrying incase.
Carry emergency water, make sure your low coolant warning is working and just plod through all the possible avenues bud. Good luck and i hope it isnt the head like mine was. Sometimes your lucky and its not the big issue :)
Had the coolant system pressure tested today and there was no leaks, mechanic was quite quick to suggest the filler cap was crap and needed an upgrade which I just picked up and fitted. Going to run it over the weekend and have another look at it next week.
If the cap was to fault then the air should work its way out and leave the coolant in?