Question about 2000 Pontiac Sunfire

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I have a 2000 pontiac sunfire. We just put a new thermostat on and my car is running hot. We have had to cut the core out of the thermostat to keep it from running hot. This has happened everytime we put a new thermostat on

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Replace the radiator overflow cap $8-10). Its pressurized and if the seal is worn it will cause it to loose the cooalnt

Posted on Sep 06, 2013

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Make sure your not putting the thermostat in backwards

Posted on Dec 07, 2008

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Which hose goes where on my 2000 pontiac sunfire heater core...


are you installing the correct thermostat the right in the head or block
3 thermostats indicate incorrect fitment method
heater hoses run either way as the water is pushed through the heater core by the pump

Apr 21, 2017 | Cars & Trucks

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Pontiac sunfire overheating


hello! I had the same problem with my 2000 Pontiac Sunfire... there might be one of these 2 problems with it.... maybe the Heater Core is jammed and the coolant dosen't flow thru the engine to cool it off, or the water pump is defective.... does the heating works or not? if yes, the water pump is defect, if not, the heater core is jammed, try a ''radiator hose cleaner'' (sold in Napa's or Carquest..) it will act as a kind of ''decloaker''.. if works, good! 15$ solution... if not, replace Heater Core... ~150$

Jan 09, 2012 | 2000 Pontiac Sunfire

1 Answer

Heat stopped working in 2000 pontiac sunfire


With blower on high and tempature to max heat check to see if you have good air flow in all mode selections (defrost, vent, floor etc.). If so and you still have no heat then check heater core hose going from engine to inside car to heater core with vehicle running and coolant tempature about half on guage. If both hoses are hot and coolant in radiator/overflow bottle is full then hot cold blend door is stuck in cold position. If coolant level is low you will get no heat, check coolant level first.

Dec 18, 2011 | 2000 Pontiac Sunfire

1 Answer

My car running hot in blows cold air out of blower already replace thermostat and radiator relay switch for the fan


You may not be getting enough coolant to flow through you heater core. I worked on a car once where the core was badly calcified due to the owned using tap water as opposed to distilled water.

Nov 18, 2011 | 2000 Pontiac Grand Prix

2 Answers

New thermostat,water pump,alternator.battery,head gasket i can drive the car ror 15 miles i hear water sounds like in dash then sounds like it releases. it will run hot for a while . i cut it off for 10...


the car will run fine with a heater core bypassed..though if the h-core was leaking there should be water on the pass side floor...you may want to check out your fan switch

Mar 21, 2011 | 2000 Pontiac Sunfire

1 Answer

1998 Pontiac Sunfire Symptoms: -Overheating


What are you going by to say it's overheating , temp gauge ? Have you test to see what the actual temp. is > Hook - up a scan tool ,what's the PCM - engine computer seeing for engine temp. ? 223 degress the PCM should turn on the cooling fan . You could buy a Non-Contact Infrared Thermometer With Laser Targeting at harbor freight ! Radiator very hot ????? What is the right temp .
Non Contact Infrared Thermometer With Laser Targeting

Could be a bad temp gauge . Is the coolant surging inside the cooling system ? Does it have a radiator cap ? Have you replaced it ?

May 06, 2017 | 1998 Pontiac Sunfire

2 Answers

2000 pontiac sunfire keep over heating and shuting off


if your not losing coolant then id try replacing the thermostat.

May 21, 2010 | 2000 Pontiac Sunfire

1 Answer

Were is the thermostat located in a Pontiac Sunfire 2000?


Hi:
Your thermostat is located under the thermostat housing, which is what the upper radiator hose clamps to on the top of your engine. Basically, you need to start with a cold engine, drain your radiator, then unclamp the upper radiator hose from the engine. Remove the bolts from the thermostat housing, and gently tap on it to remove it. clean up the mounting surfaces on both the engine and the housing, and install a new thermostat, and new gasket. tighten to proper torque, reconnect the radiator hose, then refill up the radiator and cooling system.

Nov 24, 2009 | 2000 Pontiac Sunfire

1 Answer

I have a 2000 Pontiac Sunfire. It keeps overheating. I have replaced the radiator, water pump, a couple hoses, and the thermostat. I ariated it. It still overheats only runs cool if I run it without the...


i'm not being smart, but do you know for sure you are installing the thermostat correctly? the thermostat is there to slow the water flow down long enough for the water to obsorb the heat .also is the cooling fans operating ?do the fans come on at around 210 degrees?is the radiator grill clean? lower spoiler intact? does the engine over heat at highway speeds or while idling? are there any codes?is the engine running lean? possible fuel filter stopped up.fuel injectors dirty. let me know

Oct 14, 2009 | 2000 Pontiac Sunfire

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