Overheating 1991 Mazda Protege

Tiny
BHALE7904
  • MEMBER
  • 1991 MAZDA PROTEGE
The car is a 4 cyl 1991 Mazda Protege. This car has about 96,000 miles on it. It is overheating when at an idle or very slow traffic but does great on the highway. So far the radiator has been flushed and thermostat changed. The temp gauge was checked to see if it was faulty but it isn't. It appears to be circulating water ok but can't say for sure. There's no water on the outside of the engine or in the oil. What do we check for next? Any help is greatly appreciated. Myson bought it to take back to college and he is very mechanically challenged but it seems to have our local mechanic stumped.
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Saturday, August 18th, 2007 AT 1:52 PM

3 Replies

Tiny
RASMATAZ
  • MEMBER
Was it bleed properly and fans coming On.
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Wednesday, August 22nd, 2007 AT 4:40 PM
Tiny
BHALE7904
  • MEMBER
Yes it was bled properly and the fan on the back side of the radiator is coming on. The temperature sensor was replaced, the radiator cap was replaced as well and when I had it out today it is still going up to the H on the gauge and staying there after just a few minutes of idling and being in city traffic but it isn't boiling over. There is no leakage to the outside that can be seen at all and absolutely no water/antifreeze whatsoever in the oil. Also it has no problem whasoever accelerating up to 65-70 on the open highway nor any problem pulling a hill so there is no loss of power.
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Wednesday, August 22nd, 2007 AT 6:56 PM
Tiny
RASMATAZ
  • MEMBER
Pull the thermostat out run it w/o it-is it still happening if so. Remove the Rad. Cap start it up run it for 5mins. Do you see the coolant swirling around in the radiator-

Also you can squeeze the upper hose, thermostat has to open-do you feel a strong flow going thru when you let go.
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Wednesday, August 22nd, 2007 AT 7:06 PM

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