Question about 1996 Pontiac Sunfire

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Car is overheating still after I replaced waterpump & thermostat.

How can you tell whether you have a blown head gasket, without taking motor apart.

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Do you have a air lock perhaps this will cause grief! you must bleed it out patients is a must for this.

Posted on Jan 04, 2009

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My 1990 ford ranger 4 speed w overdrive keeps overheating. thermostat good waterpump good. when overheating overflow is boiling and bubbling


maybe bad head gasket causing bubbling in over flow tank
if level is going down you might see white smoke from tail pipe,
wet spark plugs or engine oil looking like coffee.
hope this helps

Apr 17, 2016 | Ford Cars & Trucks

1 Answer

Leaking antifreeze from around top of motor behind the thermostat


Many thermostats have a gasket installed between the thermostat housing and the engine block / waterpump. If the the thermostat is bolted securely - you may need to remove the thermostat and replace the gasket. While you're there - swap out the thermostat too. It's one of those "Two birds / one stone" kind of thing. See the "..Blown Head Gasket..." link below.

How to Avoid Blown Head Gasket GM 3 1L 3 4L

Feb 25, 2014 | Pontiac Grand Am Cars & Trucks

1 Answer

96' Mazda 626 LX-our car is overheating and our


The thermostat probably seized. Check the oil for water or large amount of water coming out of the exhaust for a blown head gasket.

Oct 15, 2012 | Cars & Trucks

1 Answer

We put antifreeze on it, and it went right out. I put more and I drove it home. driving slowly, it started to make noise in the front, and eventually stop. is this a symptom of a blown gasket?


This car is hard to blow a head gasket but sounds like you overheated it too the point the motor stopped running, you will need to find out first what the leak was and repair it and also replace the thermostat due to overheating it, then fill with coolant and run the motor, if you have an overheating problem then have a block test done to see if the gasket let go.i ve worked on many that were overheated and they were ok, they just needed a thermostat and a waterpump that leaked or the impeller was rotted away, hope this helps.

Jan 10, 2011 | 1992 Toyota Camry V6

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My 98 ford contour keeps overheating i just replaced the radiator and the water pump. And there is no water in the oil. The fans work but it still overheats . What else could be causing it to overheat?


I can't believe anyone would replace the waterpump without also replacing the thermostat. Once overheated, a thermostat is no good anymore. It must be replaced.

But that is not the only possibility. You could have a bad head gasket, without having oil in the water. Only a pressure check can tell. You could also have a collapsing lower hose, as water pump suction causes it to pinch off. You could also have an air bubble from not bleeding it properly when refilling. You could also have a loose waterpump belt. You could have put in the wrong waterpump, as the type for normal V-belts runs the opposite direction of the type for serpentine belts.
There are many more, but that is all I could immediately think of.

Jun 27, 2010 | Cars & Trucks

2 Answers

Engine is overheating ,radiator is bubbling, and white smoke from my rear head. blown gasket? or cracked head. and what is the best stuff to use to fix blown gaskets


Blown head gaskets for sure, no way of knowing if heads are cracked without taking it apart, there no quick fix for this, only fix is to take it apart and repair as needed.

Jul 08, 2010 | 1997 Buick.5 Regal

1 Answer

My Oldsmobile is leaking the fluid that keeps the car from over heating


u mite have a hole in a hose or maybe you have a blown head gasket. is your car overheating when started? if ya it could be need a waterpump. or a thermostat. its probly waterpump

Feb 17, 2010 | 1992 Oldsmobile Achieva

3 Answers

Overheating....changed waterpump/thermostat!


Take the overflow tube out of recovery tank and immerse in container of water. Run engine and watch for bubbles. (head gasket) Is your fan coming on? (fan or relay)

Oct 17, 2009 | 1986 Toyota Tercel

2 Answers

Northstar engine overheating


Have you checked the head gasket? Common overheating problem.

Aug 14, 2009 | 1997 Cadillac DeVille

2 Answers

1995 legacy 250t wagon - overheating


Two possiblities; a blown head gasket, or a freeze plug leaking. If possible take it to a trusted shop and have the pressure checked on the radiator, they can tell you if your radiator is stopped up, or the freeze plug is leaking, and if it's blowing back in the radiator when you remove the cap then it's a blown head gasket.

Sep 28, 2008 | 1993 Subaru Legacy

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