Hi,
iv been having some problems with my t reg (1999) volkswagen polo 1.4cl over heating, and i hope someone can help me out.

basically about 5 months ago my car over heated for no reason, so i took it into a garage, they fixed it, saying it was an electrical problem (not to sure cos as far as im aware the only electrical thing in a coolant sytem on my car is the fan, and that was working (dodgy garage?)), i also noticed tho that my heater no longer blew hot air after they fixed it, was working fine before i took it in, or before it overheated.

couple of weeks down the line, my car over heated again, this time i called out recovery and as a temporary fix the mechanic took the thermostat out, as long as i drove it slowly it would remain at working tTemperature and i fitted a new thermostat within the next couple of days and the car ran fine for 4 months or so

yesterday for no apparent reason my car over heated again, i stopped soon as i noticed and found there was no coolant left, i only checked it 2 or so days ago and the level was fine.

so today i took the thermostat out, and tested the thermostat in a pot of water, it opened up, but now remains stuck open ., i connected the hhousingback together and checked to see if the car over heated without the thermostat, which it did, if rrev edfor any amount of time the car over hhe atesand continues to over heat even if stopped rreeving the most worrying thing for me is that when you do rev, there is a lot of liquid ccomingfrom the exhaust, i cant tell wwhetherthis is just water or coolant, as i only filled my system with water 2day bbecausei was believing it was a leak and ddidn’twwannawaste coolant.

things you should know
the fan does kick in at working temp, but ddoesn’tseem to bring the temp down
the hoses leading to and from the radiator are very hot (hotter than normal) and feel like there under pressure (hard to squeeze)
the oil is still clean, not wwaiteddown or milky.
no white smoke is eemittedfrom exhaust.
no leaks appearing from aany were even after car has been running for a while.
and iv bleed the coolant system eevery timeiv topped it/ refilled it replaced the thermostat eetc

so if u have any ideas, i would much appreciate them, im thinking its along the lines a moving airlock?, or head gasket?
much thanks in advance
Rob