I have a 94 saturn (manual tranny)with 110000 miles on it. It over heats when in 5th gear between 45 and 60 miles an hour. Above this it cools down to the middle peg on th e gauge. The car has a 97 engine (~70000 miles)put in it that I put in so I had to tap into the coolant temp sensor that goes to the computer for my gauge in my cluster since the 97 engine didnt have a spot for it. I flushed the radiator, put in a new water pump, still same problem. It doesnt over heat to the red, just a few millimeters past the middle notch while at any low rpms.
Whats confusing is it will actually cool down at idle or rpms greater than 2750 so it doesnt seem like its a thermostat. It also has a rough idle when itwarms up as well and doesnt want to crank up when its warm. Please help!
oh yeah its a dohc engine 1.9 litre sc1 I believe
Wednesday, May 17th, 2006 AT 9:50 AM