Question about 1994 Pontiac Grand Prix

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The car over heated and the radiator cap blew off but it had plenty of coolant. That caused the radiator to crack on the seem. What happened and how can i fix it?

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  • Pontiac Master
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Check to see if the fan was working, check to see if the thermostat was stuck closed.

Posted on Jul 03, 2010

Testimonial: "that honestly is what i was thinking and i even got a radiator and a thermostat. hopefully that will fix it otherwise i need to learn how to fix the fans. thank you"

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My 93toyota camery overheated cause of split n radiator replaced with new radiator but still blows water out of overflow think could b waterpump n sounds like missing could that b because of the water blew...


Possibly blew a head gasket allowing combustion gases to enter the cooling system and force coolant out of the overflow tank. This can be verified by doing a compression check on each cylinder.

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get a pressure test on radiator via a radiator cap that has a pressure gauge with the engine running . The head gasket is probably blown on the engine and this can cause exhaust pressure to go into the cooling system and create this symptom you are experiencing.
you may also have more expensive problems like a warped head or cracked head . $$$$$ - remachining or welding and remachining of engine head and a blown gasket .

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Does a blown head gasket cause pressure build up in a surge tank


could be a air pockets in the coolant system that have top bled out
it is a simple exercise to have a compression test done to check for head gasket or cracked head

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What wud cause my 300m 3.5 to burn antifreeze


A couple scenarios- none of them exactly cheap.
1- Head gasket blew or corroded; did it overheat at all recently? It may show a cylinder or two as mis-firing.
2- manifold leak. Are you also getting a lean error code?
3- porous casting or crack developed.

If you open the cap on the radiator hose with engine cold, or if you happen to have a radiator with a conventional cap, is there any oil film or sludge? Is there any on the dipstick/crankcase? If so, there "might be" a crack i nthe engine block. If you leave the cap off the hose or the radiator and start it cold- if you suddenly get a geyser of coolant- the problem is likely a cracked head or the head gasket is the issue.

"Some" white smoke may be visible when the engine is cold right after startup- this is a small amount and is reasonably normal if slight.

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Water or coolent is going over to resovor and not returing into radiator what is the problem


you need a radiator cap. what's happening is the cap has a pressure rating ( likely 16 psi) so when the car is warmed up and the cap is hot, the metal is prolly getting more pliable with heat and pushing the coolant into the reservoir. but when it's cold, the cap is too stiff and not allowing the coolant to syphon back into the radiator. If you're radiator is cracked it could cause this problem too but you'd see a leak.
Good luck!

Jul 19, 2011 | Toyota Pickup Cars & Trucks

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What would cause a 2004 Dodge Caravan to leak engine coolant from both sides of the radiator and causes smoke on the driver side near the coolant reservoir?


Hi,
Seems the smoke is the hot steam from the coolant. That escapes from your radiator. The culprit would be the radiator cap. The coolant when your engine is hot, goes to your coolant reservoir, and it( coolant ) should go back to the radiator when your engine cools down.
The coolant failed to go back to the radiator because the radiator rubber seal is already broken and suppose to **** the coolant from the reservoir. Coolant also escapes from the radiator, thats why you see some coolant from both sides of your radiator. The heat inside the radiator expands the coolant and the only course is through some crack seals.
Radiator cap have pressure rating that opens its valve in a certain pressure.
Hope that helps you out!
Thanks for seeking help from FixYa!

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CAR CONTINUES TOO RUN HOT AFTER REPLACING WATER PUMP, THERMOSTAT, AND RADIATOR, BEEN TOLD IT MAY HAVE AIR BLOCKAGE, DON'T THINK IT HAS A CRACKED HEAD OR BLOCK, DOES NOT LEAK WATER, NO WATER IN OIL, OR...


Try this.

With the engine cool remove the radiator cap. Now start the engine and let it warm up to the point where the thermostat opens. You can usually tell when this happens by checking the temperature of the upper radiator hose, and the coolant level in the radiator. It will start getting a lot hotter quickly when it does and the coolant level should drop.

While the engine is warming up, watch the coolant in the radiator for air bubbles. Fill up the radiator as needed while continuing to watch the coolant level. Having the radiator cap off while doing this allows the trapped air to escape more easily. If you do have a large air blockage then when the thermostat opens you should see a large drop in the coolant level. You want to keep the Radiator full. Once the air bubbles seem to have stopped you can replace the radiator cap.

You may have to repeat the process a couple times if there is a large amount of air trapped in multiple pockets.

A cracked head or block you can usually diagnose as there will be a lot of small bubbles coming out constantly while the engine is warming up, and even more bubbles if you rev the engine higher as the compressed air/fuel will be forced into the cooling system.

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1995 Volvo 850 Overheating


head gasket is blown

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Overheating and change engine oil ... oil was changed one week ?


it seems like the radiator of your car needs attention. check for coolant level in it, when its cold. if les add some coolant and then see if the problem persists.
--than there are chances of chocking in the coolant pipes, may be they not reached to engine..  
--Check the chock,, that it is not turned on. 
--May be sum loosing nut in engine.

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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

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