Ok so car finally over heated last night. I realized that the only thing hot and boiling was the coolant in the little plastic bottle. Coolant was exiting off that small tubing on the side as it dripped down it created the smoke. Engine was cool, radiator calm. Though I have had both boil in past times. Seems like a hose be out or the radiator cap is crap. Just asking what are your opinions on this? Its a 7mgte engine on an automatic 88. (I know I know conversions coming). I was planning on switching out the radiator to a Koyo radiator. Should I do that now and replace all the hosing to see how it goes? I'm just a bit confused as to why it overheated and the only thing hot is that little reservoir tank