Can someone help me!<br>My supra just wants to keep overheating. I already replaced the head gasket. I even tightened up the fan clutch to run at high speeds. It just doesn't want to run right. <br><br>any ideas?<br><br>jt.

Cooling systems generally have two problems, leaks and boil overs.<br><br>If it is a leak, it can be from a lot of places. Simple detecive work on your part is all that is needed in most cases to make a diagnosis. Look for the leaking water or shooting steam and you'll find your problem. Remember to include the heater core in your search for leaks, if the inside of your car smells like antifreeze or the windows are steaming up when you use the heater, thats the problem. One thing a lot of guys forget for some reason is that water flows, where you find it might not be the source of origin. You've got to track it back to the source. <br><br>Be sure and check to see if the water pump shaft is leaking, that's one place people overlook. Water coming out the hole on a pump means the shaft seal has worn out. Time for a new pump.<br><br>If it is simply boiling over without any other noticable problems, consider the following. Bad thermostat, bad pressure cap, bent fins on the radiator, clogged up radiator, pinched hose.<br><br>If it is neither leaking or boiling over, you might not really have a problem. It is summer now it might be running just a little hotter.