Hello BMW enthusiast, I am a new member to this. Only reason i joined is because you guys are really helpful so i just wanted to thank you first off.................I have a 95 525i the coolent level to the radiator seems to evaporate in a short period of time and recently started overheating. It went nuts for a minute not wanting to take any coolant.....it would overheat every 3 miles or so. Luckily a guy helped me out said there was steem or something boiling it up. He told me to bleed the little screw next t the radiator cap. Is that the right thing to do.....someone told me it could be my thermostat or my water pump can someone help plz!