Question about 1997 Cadillac DeVille

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Radiator fans will not come on

Car keeps over heating anti freez is being pushed right back out of reserve tank

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Your problem is likely one of two things 1 a blown fuse/bad relay 2 a bad temperature sensor

Posted on Dec 13, 2008

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If the reservoir tank filled with cooant, it is necessary to fill up the radiator with water?


Yes, the radiator should be checked first for anti-freeze level. If it is low, top it off and pour remaining fluid into the reserve tank to the proper level. Re-check after driving and then you may just fill the reservoir only if you like.

Jun 05, 2015 | Mitsubishi Montero Sport Cars & Trucks

1 Answer

Where is the Coolant Temperature Sensor


The sensor for electric fans were usually screwed directly into the radiator, At the bottom of the radiator tanks. Do yourself a favor and replace the thermostat first if you haven't already. If you plan on keeping it buy a mech. manual from your local parts store there cheap and can help you out a lot. Never run a car with out a thermostat. F.Y.I.

Jul 24, 2012 | 1994 Pontiac Grand Am

1 Answer

2003 Honda Civic LX 90k miles replaced parts: thermostat, radiator cap, radiator. major timing belt job including water pump. Car is overheating: When i am idle coming off the highway the gauge...


it is possible that when the water pressure rises in your radiator, and the radiator shoots the water into the reserve tank, that hose is not properly put on(happens alot when changing radiator) and the coolant leaks rapidly through there. another thing i suggest is observe your fan behavior. fans usually are only supposed to turn on for a couple of seconds, around 10 or 15. park your car, and let the car reach normal operating temperature. when the car starts to over heat, check to see if your fans turn off at all. if they do, then it is most likely the tw swith,or the water temperature switch. if you notice the fans stay running, then i suggest obesrving your hoses and replaing any that spill coolant because even a pressure test on your cooling system can miss a small pucture in a hose, which after a while will cause your coolant to leak, and your car to overheat. hope this helps. if still nothing, drop a comment and ill help you out somemore, but for now, this is the practical thing to do. hope this helps, goodluck.

Jun 05, 2011 | 2003 Honda Civic

1 Answer

The Auxilliary FANS keep on turning ON even if the engine is stop or no ignition please HELP


The fans will run even if the vehicle is off. This is to keep the engine from overheating
after it is shut off. (residual heat). Now if the fans run continuously after the
vehicle is shut off and do not shut off in say, 15 minutes then the fan relay may
be stuck or the temperature sensor has failed. The fans may also come on after
a long drive several minutes after the vehicle has stopped as heat builds up
because there is no air flowing across the radiator. They may even be controlled
by the engine computer in some vehicles. You can have a code check
run at many parts stores for free.
Also, check the coolant
level with the vehicle off and totally cold at the radiator itself to be sure that
it's not low (Even if the reserve tank is full you can still be low creating hot pockets in
the block). Make sure the overflow tubes are connected to the reserve tank
I have seen them fall off and drain the radiator slowly without being noticed.
Hope this helps.

Mar 30, 2011 | Mitsubishi Montero Cars & Trucks

1 Answer

Overheating and trying to locate the radiator and the reserve coolant tank. Don't know which is which?


The radiator is usually the black tank in front of the fan. It has a silver cap (DO NOT REMOVE WHEN HOT!!!) that you can take off when the car is cold to check if there's fluid in it. The reserve coolant tank is usually a white plastic and has a hose in to that connects to the radiator. It is used to catch the extra fluid that comes out of the radiator when it warms up becasue coolant expands when it's heated. The reservior should have two marks on the side of it. One for "max fill" and one for "add". Add coolant to it if it is below the "add" line. If it's extreamly low, you'll have to add coolant a coulpe times to level it off once air gets out of the system. Your best bet is to remove the radiator cap, top it off with the right antifreeze (you can get this pre mixed) and replace the cap. Then fill the reservoir with the right antifreeze to the max fill line and drive the car until it gets warm. About 10 minutes. Then top off as necessary. I do NOT recommend using plain water to do this. If you use water it can freeze and do extensive damage to your engine. Go to your local auto parts store and ask them for the correct antifreeze. Ask them how to mix it or purchase the pre mixed kind.

Dec 08, 2010 | Lincoln Continental Cars & Trucks

1 Answer

Over heating 1997 Kia Sportage


Does the radiator fan operate properly? The radiator fluid level (checked when the engine is cold) must be 'at the cap' with the reserve tank about half-full. Blow out the radiator core with compressed air (from the engine side) to clean it of bugs and other debris. Does the anti-freeze look green or rust brown? If rust colored, the entire cooling system needs to be drained, cleaned with system cleaner, and refilled again with a 50/50 fresh mixture of anti-freeze and water. If combustion gases are leaking into the cooling system through a bad gasket or warped cylinder head, that will cause overheating. Check the radiator cap for condition of it's seal. Occasionally, the water pump impeller will begin slipping on it's drive shaft causing limited water flow through the system. That is checked by reducing the level of fluid in the radiator to just above the core and temporarily removing the thermostat. You will observe water moving rapidly if the pump is working.

Sep 14, 2009 | 2001 Kia Sportage

2 Answers

It smells like anti freeze


if its inside the cab? your heater core is leaking most likely

Sep 14, 2009 | 1996 GMC Suburban

2 Answers

Overheating,reserve coolant tank boiling I have a 2000 Ford Taurus with the similar problem. I had my water pump replaced then this started.


Ford 2000 Taurus

To solve the problem you have the things to do in this order;

) When the engine is cold top off the radiator with fluid. (When the pump was replaced the fluid should have been also)
) Make sure the radiator fluid has anti-freeze in it. This is also anti boil also !
) Add fluid to the overflow reservoir.
) Make sure the drive belt was replaced on the water pump.
) With the engine running, you can add fluid to the radiator for the first minute or so. You want to get air pockets out.
) Replace radiator cap.
) Let car warm up. When it's hot you should get the radiator fan coming on.
) When it get hotter the air-conditioning fan may come on.
) If the fan does not come on, the heat sensor is probably bad.
) If all fans come on, and it overheats, you may have a bad thermostat. Trace the upper radiator hose to where it connects to the engine. That's where it located.

Do not operate the engine when it overheats, You will damage the head gaskets and cause radiator fluid to leak into the cylinders.
If you smell radiator fluid in the exhaust fumes, it may already be leaking.

May 07, 2009 | 2000 Ford Taurus

1 Answer

Dodge 99' Stratus Over Heating


Overheating going down the road is usually caused by a faulty/clogged radiator. There isn't enough flow/cooling effect. Check for debris in the fins, or replace the radiator.

Mar 05, 2009 | 1999 Dodge Stratus

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