Question about 2003 Pontiac Sunfire

1 Answer

Overheating radiator I have a 2003 pontiac sunfire 2.2 eco tech son hit a stump and broke my radiator fan. This happened several months ago. i was unaware that the radiator fan wasnt working, because it hasnt been running hot until this past weekend. i had the fan replaced, but, it is still running hot. Do I need to bleed the water line? I lost my owners manual, and I'm not sure why its still running hot, or if I'm bleeding it right.

Posted by marni_2 on


1 Answer

Chris Lang

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 2 Answers

I'd make sure you have fluid in your radiator. Does you AC blow cold? If it doesn't there is a chance you are low or out of fluid. This would lead to a crack in the radiator. Is it a crank shaft driven fan of electric?

Posted on Jul 12, 2017


4 Related Answers



  • 85239 Answers

SOURCE: 96 pontiac sunfire


Posted on Oct 06, 2008


Jonathan Wolf

  • 46 Answers

SOURCE: have a 97 sunfire put

I would replace the driver's side brake hose, they're usually under $20 at an auto parts store. (Buy a bottle of brake fluid)

As the hoses get older, they can collapse, or build up debris inside that blocks the flow of brake fluid.

Posted on Jan 16, 2009


  • 1 Answer

SOURCE: 1999 pontiac sunfire bleeding clutch

my 1999 pontiac sunfire drivers door latch is broke can not close the door. i have it pulled shut? how much will a used latch cost, or even 3 bolts for it? all the auto stores/ jumk yards are closed for me to call

Posted on Aug 01, 2009

Scott MacLeod

  • 3 Answers

SOURCE: How do you bleed the brakes on a 1996 pontiac

This is to completely refresh your brakes.
What you will need. Wrench to loosen bleeder valves Bleed Kit, or some clear tubing and a jar. Small board 1x4 Helper, as not easy to do yourself. BV = bleeder valve MC = master cylinder
1- Remove Master Cylinder Cover 2-**** out old fluid and wipe clean 3- Refill MC with new fluid. (always replace cover after doing this) and pump brakes 10-015 times, then top off MC with fluid. 4. Place board under brake peddle to stop it from going down to floor 5-Starting from furthest point (right rear, left rear, right front, left front) loosen bleeder valve but keep closed. 6-Attach tubing to bleeder valve, and put other end in jar half full of new brake fluid 7-Have helper push brake slowly and evenly until at board, and they should let you know they have stopped. 8-Open BV 1/4 turn. Old fluid and any air will go in jar. When it stops, close BV and have helper release brake. 9-Repeat several times until fluid is clear. ( MC will need topping up, otherwise air will get in) 10-Retighten BV, and repeat at all brake locations
Note Make sure MC is always topped up and BV closed when done. Always use recommended manufacturer fluids.

Posted on Jan 19, 2011

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I have a 2003 pontiac sunfire that runs hot and then is fine for a couple weeks . have put it in the shop several time .Any ideas?


Running hot would come down to a blocked radiator, a collapsed hose, a faulty temperature sensor or a cylinder head/gasket problem.

it could also be the gauge or even a bad earth on a temperature sensor.

Does your car exhibit any signs of overheating .. steam .. boiling radiator ... rough running?

It's strange that it runs fine for a couple of weeks and then runs hot. To me that suggests a temperature sensor/thermostat problem coupled with the outside air temperature.

What did the workshop suggest?

Mar 21, 2016 | 2003 Pontiac Sunfire

3 Answers

2003 sunfire using oil - oil in air box by throttle body - where is pcv valve located

Check and or replace your PCV valve. also make sure the oil level is not overfilled.and your airfilter is not dirty/plugged

Aug 26, 2012 | Pontiac Sunfire Cars & Trucks

1 Answer

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

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

1 Answer

I have 2001 pontiac sunfire keeps overheating. I replaced thermostat and antifreeze still overheats?

did you check the radiator fan? if fan doesn't works. Check the radiator fan relay.

Aug 16, 2010 | 2001 Pontiac Sunfire

1 Answer

02 sunfire overheating

make sure you have radiator full of coolant
run the car to operating temperature
check the operation of the cooling fan
feel the upper radiator hose and the lower radiator hose. they both should be hot.
if one is cold then you may have a bad thermostat or restricted flow
if cooling fan does not come on when engine is hot then you have bad cooling fan switch, relay or motor.
good luck

Mar 07, 2010 | 2002 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

2 Answers

Pontiac Montana overheating

How do you know the thermostat is ok? If in doubt replace it. Water pumps are a even bigger what if. Did he do a radiator flush? Cooling system flush of the engine? Cooling fans come on at what temp and go off when? Replace the engine temperature sensor? 6 years old is bound to have sensors and such go bad.

Jun 16, 2009 | 2001 Pontiac Montana

1 Answer

Rad fan makes car shake 2003 sunfire

I would check the radiator fan in the car for looseness. If the fan wobbles or moves , Then change out the radiator fan. The radiator fan and motor come as one piece. There is a fan relay also should be replaced.
When turning the key only half way to make the dash fan work, indicates that the dash fan is okay.
The dash fan may make a whining or high pitch noise when engage. Then I would change it out because an internal bearing to the fan is going out.

Good luck

Mar 18, 2009 | 2003 Pontiac Sunfire

Not finding what you are looking for?
2003 Pontiac Sunfire Logo

Related Topics:

107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides