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Running hot loseing antifreeze - 1999 Oldsmobile Alero

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Bad water pump,Would be first guess. will leak antifreeze out. Hole in hose will cause same problem. Check oil for antifreeze if found blown head gasket.

Posted on Sep 28, 2010

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Posted on Jan 02, 2017

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Dodge durango 2000 the antifrezze emptyes after we put it in


You're losing the antifreeze probably due to a leak. Look under it for a puddle. if no puddle, tighten all hose clamps and have the cap tested, if it's ok, you need to pressure test the cooling system to try to see the leak. If you still can't find it, it may be a head gasket or cracked head.

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2004 dodge durango keeps running hot..i keep adding coolant then it stop for couple of days then start running hot again


If yo keep adding then you're obviously losing antifreeze somewhere. If it's not dropping on the ground then I'd say you have a blown head gasket and it's going out the exhaust. If you keep running it hot and it is a blown head gasket, sooner or later you'll warp the head or crack it, then you'll really be outting out the money for a fix.

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Losing antifreeze.Co. will hot engine, and the engine is not mixed with oil


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I have a 2004 pacifica. I've changed the hoses and the thermastat and the car is still losing the antifreeze. the mechanic said that he does not see a leak. The radiator was also cheked and it'


drain the oil an see if it has water in it. if it does that you have a big problem. if not that make sure the freeze plugs are in other than that umm...idk if there is no leaks than it has to be draining into your oil

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Car overheats, losing antifreeze...the overflow coolant reservoir leaks out onto the ground when I try to put antifreeze in there - so could this cause my car to overheat? I have had the antifreeze drained...


Hello, if your car has a blown head gasket and exhaust is entering the coolant system, it will continue to run hot until it is repaired. Using pure antifreeze will make it worse. It should be at least 1/2 water. If the coolant reservoir didn't leak you could probably drive a few more miles, but not many, before it overheats again. All that is doing is giving you a little more capacity. If you continue to run the engine hot you are going to do more serious damage to it.
I suggest you have the head gasket replaced. That stuff you put in there seldom works, and if it does work, it's only temporary.

I hope this helps.

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It could be the water pump, the air switches from hot to cold because the heater core is the highest point in the cooling system so as you run low on water you lose heat, if the water pump has siezed you are in danger of losing the serpentine belt, so don't wait to get it fixed.

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yes, it most likely i think is running very hot
replace the thermostat and try again

gl G

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1 Answer

Antifreeze leak only when car cools down


There should be no anti-freeze under the valve covers, just valves, rockers, springs, and oil. If you are getting any antifreeze leaks at the valve cover then you have a cracked head. Since the engine has been pressure tested and has passed, my guess would be that the coolant reservoir is overfilled. Drain it down to the correct level and see if it does it again. If you are getting a strong sweet antifreeze odor when the car is running, you may be in need of a heat core. My PT Cruiser would leak sporadically, and after running a pressure test, it turned out that the 16 pound radiator cap I had on the car was losing pressure at around 8 pounds. so it would only lose antifreeze when it was really hot and/or I was running the AC.

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