I recently used some stop leak in the radiator to temporarily fix the radiator till i could buy a new aluminum one. Worked fine for a week or so then i noticed it started overheating. When i pulled over to check it it was leaking again or dry, i noticed it did not loose any fluids. I also saw that the hose from the top of the radiator to the block seemed to be under pressure. Also i was wondering when buying a aftermarket radiator like a Mishimoto Aluminum Radiator, are they able to fit on a 90-93 and 94-01? Or is there a difference?