1.4 8v thermostat leaks

[ClarkBoyjr]

hi there i have a 1.4 8v corsa thats runs fine at he start and then after a while of driving it overheats alot i have changed the thermostat and waterpump and radiator at the same time and it seemed to work for a bit but my thermostat keeps leaking i have read the manual too many times to check if i have been missing something when putting it back together there is nothing saying about a gasket for the thermostat housing so i have just left is there anyway of fixing this maybe i could use instant gasket for it ????

[Lincs Robert6]

I've just replaced the thermostat on my 1.0 12v and it was pointed out to me that there is a rubber seal needed also. Maybe its the same with yours?

[ClarkBoyjr]

it has got the rubber seal on it i have replaced that i didn't no wether there was a paper gasket aswell as no of them fit ???? i have just used some instant gasket for it to make sue but still leaks at times though ??? i dont know wether to take it to vauxhall and ask them about it ?

[Tribal-Wolf]

If the surfaces where the seal sits are clean and not pitted or corroded then it's possible that the thermostat housing has become porous due to overheating. I would double check the surfaces first though, and make sure it's not something else leaking and the coolant is just running down to that point, something like a hose maybe?