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1990 toyota corolla wagon 1.6 liter 5 spd. overheating
1990 toyota corolla wagon 1.6 liter 5 spd. radio, heater, crank up windows 179k mi. overheated, hole in radiator, replaced overheated,bottom hose cold, temp gauge normal..replaced thermostat. overheated, bottom hose cold temp normal. took out thermostat..did not see water flowing replaced waterpump..(not fun) water was flowing, put in thermostat. test drove and it started to stumble and overheat, temp normal, bottom hose cold ,rad hot, fan runs if jumped. what the heck is keeping the water from circulating ? john
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I would next look at the coolant temperature sensor, on which the car's computer depends for a signal to tell it when the engine is too hot. There might also be a suspicion that combustion gases are getting into the coolant, via a leaky head gasket. There is a test for that the mechanic can do.
Check the timing belt or what ever you have on that engine Also have the coolant tested for exhaust gases,you may have a head gasket issue 1990 or 2008 ? big different there as to wether you make a major repair if nec
For many of the 90's and 2000's Toyota various models - Camry, Tacoma, 4 Runners, Corolla, and some other models it is usually caused by temperature sensitive fan switch on the radiator not operating. Electric fan on the radiator should operate when temp above 200 degrees. Less often the control relay 90987-03003 is defective. Check if bubbling in the radiator smells like exhaust. That would indicate a blown head gasket. A jumper wire from your marker light positive to the lower contact in the fan control relay socket will operate your fan when parking lights are on. The larger vehicles with more powerful radiator fans will need a hefty jumper from a headlight positive to avoid overheating the lighting wiring.
I would replace the thermostat. Its a cheap fix and most likely the issue. If you replace the thermostat and are still overheating then you may have a more serious issue. But going 3 miles and overheating sound like the thermostat is not opening up at operating temperature.
Check the autozone website and register the car information. This will give you access to an online repair manual. It's a very handy resource that you should find useful. Sure hope so anyway and best wishes.
Hi.
A number of possibilities...
1/ lack of coolant in system,
2/ coolant supply to interior heater blocked / controls jammed,
3/ failing thermostat switch to engine fan
4/ failing water pump
#2 may be separate problem and I would check out #3 - after #1, of course!
Hope this helps - if not hold the rating and add a comment below. Cheers, D.
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