I picked up a 1995 EXP Limited with 200K miles on it and have been driving it a few weeks now. When I was hauling some furniture around the temp gauge went to hot/overheating. Rested the car and it went away. Drove back and it never went hot again for about 2 weeks. Then it came back and red lined. We changed the thermostat and sensor but it is still redlining. The hoses read 150 degrees so it is not overheating. Coolant is fine and there is no air in the system. So it must be the gauge itself. Had a mechanic check it out and he agrees. Wants $250+ to fix it! Right. I prefer to replace the gauge in the dash myself but do not know how to do it. I hear it is hard on blogs but is it? Is worth it. I prefer to not put in an external gauge but will if I must. Can anyone help me with instructions?