90 Spirit

[nefertmu]

ok I have a problem
I just bought this 90 Spirit 2.5 non turbo and had a problem with no heat. so I replaced the thermostat. then the temp gage started to swing hi and then come down to around 1/4 still poor heat the car ran fine for over a week.
today I was driving the car to work and the gauge said it was over heating so I drove it home the "check gauges" light came on then the
temp dropped back down to 1/4 and stayed there I still went home
I didnt drive that far from the house before returning

tonight I took the car to the store .. about 2 miles same thing the gauge said it was overheating this time I checked the top radiator hose and it was cold so I sat for a bit for it too cool down and started home NOW I had some heat but it was short lived . I had to pull over and let it cool down then came home and here I am

coolant seemd ok it was pressurized I havent checked the level yet but there was some in the reserve
It needed 1 qt of oil so I added some at the store
Also I get a bad squel from the belts and My lights dim Im thinking I need to check the alt. belt

ok thats it can anyone help me out

[Polygon]

Well, the serpentine belt on the alternator drives your water pump. I would tighten that or replace it ASAP. Also I would pick up a new coolant temp sensor. If that does not fix your problem it could be your heater core which you can find on eBay cheap.

[nefertmu]

thanks Ill try that

[greatsamu]

coolant temp sensor i had same problem, i changed 3 thermostats 2 raid caps, a waterpump, raidiator, all for the sensor, good luck with it