Question about 1999 Pontiac Sunfire

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1999 pontiac sunfire, constantly overheating, could it be the head gasket? the anti-free will not stay in the resevior, keeps leaking.

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Check your Fan Cluch.This will make it over Heat.OK.Good Luck...

Posted on Aug 01, 2010

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Is it an external leak or is it disappearing with no signs of where? If you don't see the leak then it could very well be internal.

Posted on May 09, 2017

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98 CAVALIER 2.2 4 VIN, OVERHEATING PROBLEMS NEED SOLUTIONS,


BLOWN head gasket might be your problem . and we ain't you brotha

Dec 26, 2016 | Cars & Trucks

1 Answer

No heat in 1999 sunfire


This can be a few things, for starters most common in my experience is when you have air bubbles in the coolant system (Mostly when its been recently drained or flushed) You will have no heat. Also, if your heater core has failed (in most cases water will leak from under your dash) you will loose heat and your vehicle will most likely overheat. Last but certainly not least, a failing head gasket could cause combustion to leak into your coolant system causing air bubbles which could make your heater not work which could also cause overheating in further along failing head gaskets. Things to check would be a leaking heater core under the dash, overheating, check engine lights and bleeding the coolant system.

Feb 22, 2014 | Pontiac Sunfire Cars & Trucks

2 Answers

1997 pontiac sunfire dosent warm up


check you coolant level. thos car are known for head gasket. if its a 2.2 liter check the fron right of the engine between cylinder head and engine block. if its a 3.1 the cylinder head crack behind the alternator mount. could also be you coolant thermostat. hope it help

Dec 21, 2012 | 2000 Pontiac Sunfire

1 Answer

My 2000 pontiac sunfire is running hotter than usual


You didnt fix the leak all the way apparently because those are sure signs of head gasket failure. Get a compression test done and check your oil and coolant to see if they have any milky white color and texture. More than likely thats going to be your problem. I hope that helps.

Dec 02, 2011 | 2000 Pontiac Sunfire

1 Answer

My coolant level light stays on even after I add coolant in my 1999 pontiac sunfire 2.2L. Also, The car occasionally releases anti-free to the ground near the driver's side front tire. Any...


The sensor in the tank is probably bad. If you overfill the tank it will come out the overflow when your car warms up. You may also have a leak in a hose or radiator tank.

Aug 08, 2011 | 1999 Pontiac Sunfire

1 Answer

Keeps overheating. Heat works great, replaced thermostat, fan doesn't kick on so I replaced the relay, fan still doesn't come one. Coolant light stays on but plenty of anti freeze. I'm at a loss...


Hello, pgen0315 and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your
1996 Pontiac Sunfire, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating
1996 Pontiac Sunfire

Get more great money saving tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

Dec 09, 2010 | 1996 Pontiac Sunfire

1 Answer

After spending 880 dollors on having a head gasket water pump and radiator replaced in my 1998 pontiac sunfire 2.2 liter it has no flow thru the brand new radiator engine runs supur hot 260 degrees in 2...


YOU COULD HAVE A DEFECTIVE WATER PUMP OR THERMOSTAT ALSO RADIATOR PRESSURE CAP.MAKE SURE YOUR WATER PUMP IS BEING TURNED BY DRIVE BELT.NOT SLIPPING.MAKE SURE COOLANT SYSTEM HAS BEEN BLED AND YOU HAVE HALF ANTIFREEZE HALF WATER.CHECK YOUR CRANKCASE WHEN CAR COOLS DOWN.IF OIL STILL LOOK LIKE MILK SHAKE.YOUR NEW HEAD GASKETS LEAKING.THE MECHANIC WHO REPLACED HEAD GASKET DIDNT DECK THE HEADS.THEY PROBABLY NEED SHAVED A LITTLE SO HEAD GASKET WILL SEAL.

Nov 11, 2009 | 1998 Pontiac Sunfire

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