I have a 96 DeVille and it had the same problem. What turned out to be wrong was that my car has 2 fans, 1 should come on when start the car and the second comes on when the engine is under a heavy load (ex. stop & go traffic, a/c running on a very hot day). My primary fan wasn't working properly and I had to take to the shop to correct the problem.
that sounds definitely like a water pump,without a doubt. Ck electric cooling fan operation Could be a defective thermostat. Simply have it replaced (cheap to replace, and it may be your only problem). Good luck. The other answers are all possible, but my suggestion is the most basic, and the usual first item to check. Unfortunately the two previous answers will not cause the coolant to spew out when you shut the engine off. The only thing that will cause that is excess pressure in the cooling system. Just about the only thing that will cause that is a head gasket. Most Cadillacs from the early 80s on have aluminum heads. It is very common for an aluminum head to become warped when the engine overheats. When this happens a crack can form between the head gasket and the top of the cylinder block allowing pressure to get into the coolant. This in turn may cause a coolant hose to expand and allow coolant to spew out, it can also cause the radiator cap to release coolant, a good radiator cap is designed to release pressure when the pressure goes above the designated psi. The fact that it is not boiling over while running indicates that most if not all the rest of the cooling system is allowing the water to flow. The most common cause of overheating in engines is that the thermostat gets old and sticks. It only has to stick one time to cause the engine to over heat enough to either damage the head gasket or even cause a crack in the cylinder head. Take the vehicle to a garage and have them do a pressure check on the cooling system. After they have applied pressure to the system they will allow the engine to cool for a short while. If the pressure drops very much they should then remove each spark plug in turn and check the cylinders to see if coolant is in in them. If so that is the evidence that the head gasket is bad. If there is coolant in the crank case oil pan also, that indicates that either the head gasket is completely gone or that the cylinder head is cracked. Depending on your eographical location it could cost around $1000.00 or more per head to have the heads milled and the head gasket replaced. If the car is over 8 years old or has more than 100k miles on it you will be better off to have the water pump, timing chain, camshaft and crankshaft timing gears replaced at the same time. Depending on the cost of such you may wish to check with someplace such as Dr. Motorworx to have the entire engine replaced. It can sometimes cost less to do that. And these shops usually not only guarantee their work, but usually give anywhere from 1 to 3 years or 36k warranty on the engine.
I had the same problem on my 95 Deville and you will not believe how simple the solution was. I discovered it by accident. The battery died and I swapped it out. After removing the battery, I noticed the hose that leads from the reservoir to the radiator had been pinched by the battery. I straightened it out and made sure it was not pinched by the new battery. The car never overheated again, problem solved.
I had the same problem my car would spill antifreeze but it appeared my radiator was full of gunk so they clean it up and i have not had a problem yet i was glad it was not a head gasket
ANSWER after a car stops moving and you turn it off the temperature will increase as much as 15 degrees causing more pressure to develop in the cooling system could be a loose hose clamp but more than likely its the water pump they leak more when not pumping in my case it was both on my 98 deville
if fans are working and thermostat is good welcome to the world of northstar famous headgasket/faulty headbolt and stripped block crap engine problem
Sounds like a blown head gasket
It sounds like the antifreeze / distilled water mixture is freezing because the antifreeze mixture is too weak for the outside temperature Usually the antifreeze and preferably distilled water mixture is 50 / 50 ( Ford states to not exceed 60 % antifreeze )
Soundsw like heater core is going bad. You will smell antifreeze prior to actually noticing water/steam leak
AnswerIs the system overfull?, Is your gauge working?I had the same problem and I had to replace the head gaskets.
Bring to a shop and have system pressure tested to find where problem is originating
Dont use barsleak use a chemical called therma weld it work perfect for me its about 300$ and worth it!!!!
when overheating occurs at highway speeds the cause is usually. a radiator or coolant circulation problem, Check for a restricted or clogged radiator.
The most common cause of overheating is a thermostat stuck in the closed position. However, other causes are: faulty water pump, clogged radiator, clogged hose(s), coolant leak or a broken drive belt. I had a 1987 legend with around 160K that was overheating. Antifreeze would boil out of the overflow. I changed my radiator and it fixed the problem.
Cadillacs are notorious for blowing head gaskets. You may want to look into that.
Dirty or plugged radiator Water pump Defective radiator cap Thermostat Cooling fan not operating hoses collapsing
The most common reason for The Lincoln LS over-heating problem: if it is warmer outside compared to what you have you temperature in your car set at the antifreeze fluids have no where to go so it floods your dagos bottle which in terms have a switch that tells your car it is overheating. you can take it to a mechanic so that if you have your car in the cooling mode they can put another reservoir on the engine to catch the excess antifreeze. it may be expensive but this will fix it.
hardware problem hardware problem
Your truck is overheating because it needs a new radiator. I had the same problem, after I installed the new radiator and flushed out my remaining cooling system I never had a overheating problem since.
Could be a problem with the engine cooling fan , water pump , restricted radiator , any body else have any ideas ?
If it gets cold enough the coolant will freeze and crack the block if there is no antifreeze.
Valves will clatter if the engine is overheating.Valves will clatter if the engine is overheating.
Sounds like a head gasket problem to me in the least. If the overheating caused the leak then you may have to check the radiator, thermostat and water pump as well. Good luck.
could possibly be a overheating problem
Load & oil Same Problem.....
The engine could possibly seize.
my 1991 b2200was overheating until i removed the radiator and sent it to be cleaned, problem solved.
First thing you should check is the antifreeze level. If that is fine, replace the thermostat. If it still over heats after the thermostat, then most likely you need to replace the waterpump. If your antifreeze is low, check for leaks, the radiator, hoses, heater core, and water pump. If the water pump is leaking, that is your problem, replace that and thermostat all in one.
You may have a head gasket problem or a cracked head, engine oil is mixing with the antifreeze.