Question about 1998 Pontiac Sunfire

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I have a standard 1998 pontiac sunfire gt, 2.4L. It wants to overheat constantly. Im always filling the overflow tank, but when u drive it and then park, all the coolant runs out like its overheating. What do i do to fix this problem?

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I would flush the radiator and replace the thermostat, this should fix your problem

Posted on Aug 28, 2010

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The car is overheating but ck eng light not coming on. The transmission catches hard intermittently. The rpms seem to be running higher than normal.


check for low coolant level.check coolant overflow jug if it is empty, more likely air is in the coolant system.add more coolant to overflow jug until coolant level stay at cold full mark,dont over fill coolant overflow jug.if all is good, to be on the safe side, replace radiator cap,replace thermostat,if your engine overheat at a long slow driving traffic.or long stop idling, if cooling fan dont turn on more likely engine coolant temperature sensor could be faulty.

Jul 28, 2012 | 1999 Pontiac Sunfire

2 Answers

What is the tire size for a 1998 Pontiac Sunfire SE


Hello Amy
The standard tire size for a 1998 Pontiac Sunfire is P195/70R14 but it was also available with upgraded 15 inch wheels/tires in size P195/65R15

Nov 12, 2010 | 1998 Pontiac Sunfire

1 Answer

How do I add antifreeze


wait untill engine is cold,lift the hood and turn the radiator cap off and fill to the top,put the cap back on and fill the radiator overflow tank to the full mark on the side of the tank.

Jan 11, 2010 | 2004 Pontiac Sunfire

1 Answer

1997 Sunfire overheating


Did hubby put the thermostat in the right way round? Is the car driving ok no excessive smoke or steam as these cars are famous for the cylinder head gasket going south this would explain no coolant and the overheating? Does the electric fan come on? Look into the dipstick and see if there is any white mixture around it looks like mayo that’s an indication of water in the oil. Fill the radiator up again and let the car idle with the overflow tank cap of this will allow any trapped air to bleed of and help with any vapor lock. Did hubby make sure he scrapped all the old water pump gasket of the block before he put the new gasket and water pump on? If the surface was uneven e.g. old gasket still stuck on the block it would not seal correctly and leak hope this helps

Oct 12, 2009 | 1997 Pontiac Sunfire

1 Answer

2001 Pontiac Sunfire is dumping antifreeze out the overflow. Could it be something other than thermostat?


Common causes include: leak from engine, hoses, etc. causing overheat due to low coolant, electric fan not coming on, internally obstructed radiator, external obstruction to radiator (leaves paper. plastic bag on front of radiator of stuck between radiator and A/C condenser), bad thermostat and last, blown head gasket. Proper testing for any and all these conditions will give you the answer you are looking for. If the antifreeze is overflowing without any overheat, it can either be over-full, or in some cases, a head gasket can do this by filling the cooling system with exhaust and driving the coolant out.

Aug 15, 2009 | 2001 Pontiac Sunfire

2 Answers

I don't know what the symbol means on my 1999 Pontiac Sunfire


does it look like a radiator? Low coolant sensor, may be in the overflow tank. Check your coolant levels when cold.

Jul 19, 2009 | 1999 Pontiac Sunfire

2 Answers

1998 Pontiac Sunfire GT brake squil


You should Absolutely change the Brake Pads. That is what your Noise is. When the Pads get low, There is a Small Piece of Metal that Hits the Rotors to let you know that it is Time to Change Them. Please Rate My Response! Thanks!

Feb 05, 2009 | 1998 Pontiac Sunfire

1 Answer

Where is the thermostat on a 1998 Pontiac Sunfire??


Follow the hose that runs down from the fill tank and you will see it turn and run it a medal peace and that is where it is located. 2 bolts and removing a clamp is all it takes to remove it

Jan 01, 2009 | 1998 Pontiac Sunfire

2 Answers

How do you know when the radiator is full


leave the overflow tank cap off and start engine. turn your heater setting to max heat and fan on highpour 50/50 mixture of coolant till you see the coolant at the proper level on the tank. wait for the vehicle to reach optimum temp about 180 degrees. you should feel; the upper radiator hose it should be hot. then check level of coolant in overflow tank fill to proper level if neccessary. A quick note if you continue to lose coolant and can;t find a leak chances are it's being burned in the cylinder and this would mean you have a blown head gasket. to check this just start the vehicle the next day if there is white smoke yo have a seeping gasket if it's a constant white smoke then it's a severe problem and needs to be repaired immediately or you will warp or crack the intake manifold , the head or the block.. please rate this........thanks

Sep 24, 2008 | 2000 Pontiac Sunfire

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