My \"new\" 1990 350 is overheating any suggestions? First, thanks everyone in for all the help with my other problems. Well everything was going well until today, It was a 70 degree day but I used the ac. I accelerated hard and I overheated to the point where coolant was going into my overflow. The temp gage went to around 215. The past owner said he just replaced the water pump. I have a serpentine belt, is there any way he used the wrong one? It is hooked up correctly it seems, I realy dont feel much water flowing thru the top hose (should I)? What direction does the water flow? (top to bottom? or bottom to top?) What temp should the gage read under normal to hard driving conditions? I'm thinking themostat. Could the cap cause any probs? Should I have the radiator serviced? Thanks again. 1990 sub w/350 tbi stock.