Question about 1999 Cadillac DeVille

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Coolant leaks, oil pan gaskets leak started

Coolant leaks, put a new radiator/water tank on and runs hot when coolant is added runs ok with water??? oil pan gasket leak started recently. Runs hot when air is on while driving.

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  • Anonymous Mar 20, 2014

    2000 cadi is losing water and I can't see where the water is being lost form. there is no water o my car port but I have to keep adding water to keep car from running hot

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  • Master
  • 396 Answers

Check temp control sending unit and thermostat.

Posted on Jul 17, 2009

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My 2003 regal is running hot and slowly leaking all the coolant out. Can anybody tell me what the problem is?


Yes, you are running hot from leaking all your coolant out. No one can tell you where it is leaking without looking at it. Could be a hose leaking, the radiator, a bad head gasket or intake gasket, the water pump...if coolant is leaking from the front of the engine, that could be the water pump or radiator hose or a water pump gasket. Pretty common for the water pump to leak when it is worn out, that's how you know when to change it.

When you fill the radiator and overflow tank back up to full, does the engine still run hot? If it does, I would not advise running it-have a shop diagnose it before more serious damage occurs. Head gasket repairs can get very expensive-that is the danger you are facing, and if the head gasket has already gone bad from overheating, continued running of the engine can cause you to have to replace the engine. Overheating is a major cause of early engine failure.

Try to determine where the leak is, from where it drips off the engine. The coolant constantly circulates from the engine to the radiator and back into the engine. The heater hoses circulate coolant from the engine to the heater core in the heater case and back into the engine. Besides the overflow tank, these are the only places coolant would be on the car. The engine can leak coolant from a lot of places, but if leaking to the outside, you should be able to spot where it is coming from. Good luck.

Sep 18, 2013 | 2003 Buick Regal

1 Answer

What is a intake manifold gasket


Lets review what you said - - you were probably adding coolant since freon goes into the air cond unit.
If there is oil in the coolant tank, something is leaking to allow engine oil into the cooling system such as the intake or head gasket. If it is trans fluid it could be the trans cooler inside the radiator.

Dec 10, 2012 | Cars & Trucks

1 Answer

Blown Head gasket


A leaking head gasket would cause oil to leak into the coolant or coolant into the oil pan, also coolant into the cylinders and compression into the cooling system.
Lack of coolant would not keep the engine from starting but coolant in the cylinders could foul the spark plugs.
If you take the radiator cap off and can see bubbles in the coolant when the engine is running, or the radiator builds up an excessive amount of pressure, it could be the head gasket.
You could remove the thermostat to make sure it is not stuck closed.
The only way to know for sure if the head gasket is leaking is to take the cyl head off and inspect it.

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1 Answer

I have a 2006 chevy aveo and it runs hot when I run the air conditioner and the radiator tank is empty, when I put water in it, it makes a crackling noise and then when I try to give it gas to make it go...


Does the empty radiator have anything to do with the AC? OR is it always empty? You should fill the radiator and the tank when the engine is cool. Never take the radiator cap off a HOT engine. It can shoot hot steam and water all over you and cause serious burns. With the engine cool, take the radiator cap off and fill it with the proper coolant, not just water. The coolant instruction label should be on or near the radiator. Fill the radiator completely, You may have to finish it slowly because of air trapped in the system. You can run the engine a short time to assist in filling the radiator. When the engine is running, if a lot of air bubbles out it could have a blown head gasket. DO NOT ALLOW THE ENGINE RUN UNTIL IT GETS HOT. If there is air in the system the coolant will go down and you can continue to fill it. When it is completely full, shut off the engine, top off the radiator if necessary and put the cap on completely and tightly. Fill the coolant tank to the full mark with the same coolant as the radiator. Drive the car and see if it overheats. If it smokes and has water coming out the exhaust, it probably has a blown head gasket. After it cools, check the radiator again. If it is low or out of coolant, again - blown head gasket. A blown gasket can **** coolant into the combustion cylinder OR can blow exhaust back into the cooling system. It can also allow motor oil into the radiator. Look for oil when you are filling the radiator. Also check the engine oil, if it has coolant in it, it will be a thick gooey mixture. In either case you should have the car towed to a qualified mechanic for testing and repair. If none of these things are occurring, look for a leak in the coolant system. A bad hose, or a leaking water pump. A defective radiator cap or the cap is not on tight. Look for the easy things first. Good luck.

Thanks for using FixYa.
Gaker

Jul 08, 2011 | 2006 Chevrolet Aveo

1 Answer

Radiator boiling into recovery and boiing out


Does the vehicle overheat on the road? If it does and pushes big burps of coolant into the reserve tank then you could have a head gasket leak. Usually what happens with a head gasket leak is that the engine will often start and run normally but will soon start to push coolant out in a kind of foamy burp as the combustion gasses that accumulate in the engine block force their way out. You can have a small head gasket leak that allows combustion gasses to escape into the cooling system without getting coolant back into the engine and often the first symptoms of this kind of a leak is a motor that suddenly overheats, the heater quits blowing hot air and after a short while everything returns to normal for a day or so. As the leak worsens however it may keep pushing coolant out of the reserve tank with a cool or cold engine as the pressure builds to quickly for the reserve tank to handle it fully. Having said that if you have a perfectly good cooling system that is hot and take off the radiator cap it will spray blistering coolant coolant all over so never remove the cap from a warm or hot cooling system! Most additives won't stop a head gasket leak as there is just too much pressure for them to "stick" in the leak and they just get forced out of source of the leak. It's rare but you could have a water pump that's not circulating enough coolant around but usually you have different symptoms than this.

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Overheating 94 tercel


Overheating can be the result of several things including: No coolant, stuck thermostat, cracked head, blown head gasket, bad water pump, cracked radiator side tanks, and poin holes in one or more hoses.

Start with the easiest things first. Check coolant level, if it's low you need to find out why. If it's at a normal level you know the coolant is not circulating through the motor. To test this run the car to temperature then feel the upper radiator hose, it should be hot and firm to the touch. Next feel the lower radiator hose it to should be hot and firm to the touch. If it's not the coolant isn't flowing through the motor which is the result of a stuck thermostat.

If the thermostat checks out ok crawl under the car and check all the connections between hoses/motor/radiator. Look at the side tanks of the radiator. If there's a carack in one they will only leak while the system is under pressure. Next check to make sure the water pump is circulating the coolant and not leaking. A siezed water pump will usually stop the pulley from turning resulting in a broken belt.

NExt look around the area of the head gaskets for signs of leakage, again this will only leak while the system is under pressure. Check the oil, if it looks milky there's coolant in it which is a sure sign of a gasket failure or cracked head. Good luck.

Nov 01, 2009 | 1994 Toyota Tercel

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Where can i release old coolant from the tank and replace it with new coolant? More than a few months back i added a "stop leak" solution to the coolant tank bc i was putting coolant in my car almost...


buy a drain pan,drain the liquid and take it to your local steets and roads department,they have a recycle center there for free in domestic amounts.

Aug 13, 2009 | 1996 Ford Contour

2 Answers

1999 olds alero leaking coolant


problem could be heads bolts . i put new bolts in put a little sealer on them . make sure your bolt holes is clean free from debris. put a lillte sealer on intake gasket on top and bottom where coolants travel. if all was done . drain engine oil in clean container .set it aside. take radiator cap off .you a coolant pressure rise kit .put a pan under oil pan with drain plug still off .pressure your radiator about 10 psi. make sure you have antifreeze in radiator and engine . when you pressure up to 10 psi look under the car if coolant comes out oil pan. you got leaking head gasket. if not .put oil pan plug back on . put oil back in car . check your freeze plugs also.

Jan 07, 2009 | 1999 Oldsmobile Alero

1 Answer

1989 toyota 3.0v6


Did you check the thermostat? brand new thermostat sometimes went bad too; happen too me once on my 1989 toyota supra....; Check the water pump and hoses. Flush the radiator really good then get 50/50 mix water & coolant;

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1 Answer

88 Bronco ii Coolant not circulating


Good Day,

Sounds like the thermostat is working properly, the only other cause for the valve/lifter noise could be the oil pump is not pumping enough oil up to the top of the motor. I suggest doing an oil change(if you haven'y aleready), be sure to flush several quarts through, after sitting for 5 years I'm sure the old oil is pretty sludgy, this well help rule out this possibilty. As far as the water pump goes, It either works or doesn't typically when they are on there way out the will leak from the gaskets. A bad head gasket would cause white smoke form the exhaust as coolant get's into the oil and is burned off, so I don;t hink this is the problem.

Here's a start for you, hope this helps and good luck

Jul 01, 2008 | 1988 Ford Bronco II

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