Sorry if hav confused you about the over heating the temp gage goes the middle of the gage witch is 90 it goes upto 120 i didn't think that was it overheating wen i opened the bonnet i seen that the reservoir was empty so i losen the cap just a little an then the pressure built up in it an started filing up an starts spraying out the over flow i dont no much about cars i would like a decent thermostat so this problem doesn't ruin my car thank you so much for all ur help it is much appreciated