Overheated had coolant replaced thermostat flushed the system.overheated again changed the fuel filter and flushed the system again. overheated again. when on the highway I have heat but in the city driving slower no heat. also once in the city it started to overheat(there was no heat at this time) but then I got a little heat and the temp gauge went back to normal. I parked it after that.
From how youExplain your problem I would suggest a bad thermostat Or a clogged radiator or heater core and if the heater core is clogged you will not get hardly any heat and you can remove the thermostat and do a double concentration radiator flush with heater on full blast run the car four to five minutes let it set for 20 start it up let it run for another 5 to 10 minutes and repeat for as long as you Like for a 24 hourPeriod of time to break up any hard water or rust spots And replace thermostatAnd use distilled bottled water to prevent hard water buildup in the future and thoroughly flush out the radiator flush and if that don't fix it it's a bad or week water pump or airStill trapped in the system
Air in the system , bad water pump , cooling fans not working ! Maybe you should take to a shop ?
SOURCE: overheating
That leaves radiator or radiator fan problem or wrong thermostat. Did you or a mechanically inclined friend do the repairs ?
SOURCE: overheating 2001 pontiac aztek
remove coolant.remove thermostat remove bottom radiator hose to water pump.put a empty container under the radiator.take a water hose put it where thermostat goes flush out the rust in block.watch the water as it come out the water pump .if stream water is small keep flushing until you get a study sream of clear water. also flush out radiator. lower water pressure dont flush radiator it with high water pressure you could burst it. make clean the over flow jug .make sure it not stopped up.put in a new thermostat and radiator pressure cap. fill radiator with half antifreeze and half water.bleed the coolant system.
SOURCE: 2001 Pontiac Aztek is overheating. I put in a new
it could be the radiator isn't working properly, I had that problem with my Dodge truck and even though my radiator had been replaced two years earlier when I took it to a radiator shop I discovered it was bad and that was the problem the whole time.
SOURCE: 2003 Pontiac Montana overheating Temperature is
hi maybe you have a temp sensor problem or need do you check the fan is working could be electric problem
SOURCE: overheating
When the car is completely cool,check the electric fan(s) for smooth rotation.
Clean/check/change the thermo sensor,contact and wire.
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Excavate air pocket in coolant system / check for head gasket leak
This test will kill two birds with one stone.
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MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!
RAN THIS TEST IN A WELL VENTILATED AREA ONLY!
You will spill some coolant during this air pocket purge test.......BE
KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!
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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .
Top of the coolant reserve tank
Let it ran for 10-15 minutes.
Monitor for air pockets escaping from coolant reserve tank.
Small amount of bubbles is OK at 1-5 minute mark
After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.
If you do not see any in rush of bubbles then your thermostat may be
partially stuck or rusted badly inside the thermostat hosing.
Give the thermostat host few gentle taps.
If you see larger bubbles surfacing after 15 minutes then should do a
hydrocarbon (HC) dye test to test for potential head gasket leak.
Let engine cold down and top off coolant reserve tank.
Start monitor for coolant lost
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A coolant flush is require every 2 years or 24,000 miles.
I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.
Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.
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