My capri overheated yesterday, and it turns out it was really low on coolant (near a half gallon). It was full when i bought it and i have only been driving it two weeks, so this points to a bad leak. Funny thing is there is no coolant on the ground. Not a headgasket, as there is no smoke. i had a car do this once before, and it was a bad radiator cap, it would dump the coolant out only at highway speeds, so i never saw it leave. i replaced that, and it seemed fine driving to work today, but i have heard that the heater cores in these cars have a habit of going bad, so i would like to rule that out if possible as I have to make a 300 mile trip tomorrow. I checked and the floor is dry, any other telltale signs? Also, if the core is bad, how do I get it out, and where can i get a new one that will fit with little or no modification? I know that roo-sport has used ones, but i don't want to put a used core in and have to do it again in a year.
