Question about 1999 Cadillac DeVille

1 Answer

Overheating a lot of new parts ,waterpump,themostat, heater hoses,fresh antifreeze, and every other day i have to put a gal or more in dur to it low , what is going on?

Posted by Anonymous on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 130 Answers

Unfortunately, with all you have done, it appears you may have a blown head gasket or cracked head if you cannot locate any other place that the water is leaking from. First of all I would check the car for leaks after you have been driving it and turned it off. The pressure builds up in the system right after the car is turned off and you may see leaks then that you never see. If you still dont see where the water is leaking from by doing this, then pull the oil dipstick up out of the tube and check your oil. If there is a white milky substance on the oil then there is water getting into you oil which indicates a bad head gasket or cracked head. If you still dont find water in your oil by doing that then your water/coolant is probably escaping through your exhaust by water vapor. Check your exhaust while the car is running (after it has warmed up) and see if there is any water vapor coming out. Put your hand in front of the exhaust and you should feel the moistness if there is water vapor, but you should see it as well. If so, again, it is a head gasket or a cracked head. Make sure you look for all leaks in hoses, etc, (including inside passenger floorboard from heater core leaking) before you totally conclude that this is the head gasket or a cracked head. If you cannot locate any other source for the leaks then the only thing left is the head gasket or head.

Posted on Mar 31, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Not Overheating, Smells like really hot antifreeze after I drive, a/c ok heater heats but when stopped air gets cold...stummped..thermostat?, Leak?

check your hoses and make sure its not getting low because when it gets low the hoses can get hot enough to expand and spit out antifreeze without overheating

May 18, 2013 | 2008 Chevrolet Impala

2 Answers

2000 Chevy Blazer 4.3 / heater cold - using to much antifreeze

have the system pressure tested --and check exhaust for excess smoke / steam

Aug 15, 2017 | Cars & Trucks

1 Answer

2000 Chevy Blazer 4.3 / heater cold - using to much antifreeze

How would you be lost or why in the world would
you keep adding coolant

It is going out the exhaust,obviously

Lets for a head or intake gasket

Jan 03, 2013 | Cars & Trucks

1 Answer

Heater not putting out hot air like it should

Put in a low temp themostat and see if this helps. Also check your mix on your antifreeze. Make sure it is 50/50 or what ever the dealer recommends.

Dec 01, 2011 | Cars & Trucks

1 Answer

Overheating, changed waterpump new themostat put anti-freeze, leaks out don't know where it goes. It's not on the ground. Help!

chances are you blew your headgasket, an when the antifreeze flows through the internals of the engine it leaks into the cylinders an burns up on the combustion stroke, unfortunatly this is most the time a costly fix

Feb 12, 2011 | 2004 Chevrolet Cavalier

2 Answers

Is it difficult to change the antifreeze in a 2005 Ford Escape V6? Do you need to change any hoses in the process?

Most places can flush out you system for you. But you can do it your self. and only way you need to change hoses if they are cracked and leaking. you can go to you local auto part store and ask how to do it the safe way cus i may do it the wrong way. also pick up the antifreeze you will need while your i just stick a house in the radiator and take the return house off the radiator and let it flush that way and when i think its all flushed i slow it down and put in the antifreeze and when i start to see green i stop every thing and put the hose back on. but the car needs to be running the whole time to cycle it through the whole motor. but you may need to ask the right way to do not the redneck way i do it.

Apr 18, 2010 | 2005 Ford Escape

1 Answer

1999 pontiac grand am gt is overheating i replaced the thermostat, waterpump, and the upper hose gave it a full flushing and still leaking antifreeze and now it started to overheat on me. at first it would...

First check that the thermostat was installed correctly. It will not work properly if it was installed upside down. If this is the original radiator, it most likely is plugged up with deposits and corrosion. It needs to be replaced with a new one.

Jan 03, 2010 | 1999 Pontiac Grand Am GT

Not finding what you are looking for?
1999 Cadillac DeVille Logo

166 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

80263 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides