Hi again. I have a 93 notch. It was originally a 4 cylinder car someone put a 5.0 in. I was letting the car run in the driveway for about 25 minutes and then all of a sudden a pop sound and smoke everywhere. I opened the hood after I didnt hear anymore hissing and saw a big hole in the coolant reservoir and coolant everywhere. There was pressure in the radiator hose as smoke was still coming out of the reservoir, dont know if that means anything. Someone put a cheapo Ebay radiator and fans in the car that I realize now I should have changed. When I put the car back into the on position i saw the temp read high, but i dont know if that was before or after the incident now. And also the fans didnt kick on even with the temp reading high. What do I do now? Buy a new reservoir + radiator + fans? And what could have caused this?