16v overheating?

[turbodub]

Is the header tank original VAG? I only ask because I got a replacement from GSF and it is total crap. The coolant light flashes, constantly at times, there is nothing wrong with my coolant level it is just the sensor in the aftermarket tank is rubbish. 

[Gambit]

by VAG sensor they aint that dear

[turbodub]

Don't think you can replace the sensor on the 90 spec round tanks, you have the replace the entire thing 

[Uruk Hai]

Mutant, I think the reason that the buzzer didn't go is because as far as I know its a warning for the oil and not the water level or temp. The best thing you can do is keep a few pints of water/antifreeze mix in the car and check the water level every morning and keep a close eye on that temp gauge 

[Uku]

try just disconnecting the water lvl sensor wiring and see if it still comes on then , if it doesnt theres ya answer

[mutant]

Sorted (i think).  Turns out i'm an idiot, and the header tank was damn near empty this morning (when i checked yesterday it was fizzing over so i just assumed it was ok).  Filled it this morning.  Still doesnt explain where all the coolant has gone, where should I be checking for leaks??

[Daz...]

ive only ever topped this up with water, not with coolant (root of the problem?).

I'd agree with that ^^

If you have only been topping it up with water then that would explain the diasappearing coolant, the water is just evaporating as it gets hot and slowly theres getting less in there...this would also why its bubbling up when it gets hot.

[mutant]

Well hopefully its sorted now, but where are common leaking points?  As i had a minor accident at the weekend i'd like to check it over to make sure nothing is leaking

[Daz...]

I'd start by checking all the clips on the hoses to make sure nothing's seaping out of them. If there is then put a new jubilee clip on there, better to use a new one than keep having an old one work its way loose.

I've always thought the most common place to get a water leak is in the expansion tank as they can split.

[mutant]

Ok nice one, cheers.  Think i'll have to keep more of an eye on my levels from now on