Question about 1994 Cadillac DeVille

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Heater core leaking car get hot fast. - 1994 Cadillac DeVille

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Two solutions

1.) replace the heater core
about a 2.5 hour job

2.) disconnect the heater core hoses under the hood and tee them together
about 5 minutes
down side is you wont have heat inside the car anymore

Posted on May 07, 2010

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Replace Heater Core for Volvo S70 (1999)

It is your heater core. I fixed mine for $144. Ordered the new part on Ebay and followed these instructions http://www.volvospeed.com/vs_forum/index.php?showtopic=9717 It was very simple, I'm a middle age grandmother! The hardest part was cleaning up all the antifreeze. You will need a shopvac, a small one is $20 at WalMart.

Posted on Feb 12, 2009

cj2176
  • 520 Answers

SOURCE: Prizm overheats, heater core leaks, no heat

You can bypass the core or fix it that's up to you but I would change or remove the thermostat first. If it still overheats then start looking at the water pump and radiator. Hope this helps. Good luck.

Posted on Jun 09, 2009

  • 98 Answers

SOURCE: How to remove the heater core from a VW GolfMK3

there are alot of hidden screws holding the dash in. there are some up across the top of the dash by the windshield and defrost vents. also when you open the doors there are some in there. it is quit a difficult job I really dont recomend doing it yourself but if your not afraid to try and feel confident enough to tackle it good luck. it would be best to have an experienced mechanic do the job but it will cost over three hundred for labor. if you do it yourself go to a parts store that sells haynes repair manuals they cost about twelve dollars and are pretty helpfull.

Posted on Oct 31, 2009

Testimonial: "Thanks for the advice, I will find a manual and if gives some form of help I will do it myself. If not I will pay for it to be done. Thanks."

  • 1146 Answers

SOURCE: rear heater not getting hot

Hi:
Your vehicle only has one set of connections to the heating system, and you disconnected them when you bypassed the heater core. There is not a seperate heater core for the rear heat, just ducts off of the front heat.

Posted on Dec 11, 2009

  • 1114 Answers

SOURCE: heater not heating hot enough. heater core not

Good place to start is a cooling system flush and thermostat replaced.

Posted on Dec 28, 2009

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1 Answer

Heater not getting hot


Could possibly be the thermostat. also could be the heater core. keep track of it though, cause if it is anything like mine, it will start to go down hill fast. Mine started that way, and then started using anti-freeze without it leaking. Makes for a fast blown head gasket and or blown motor

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My 1998 Crown Victoria had steamed the passenger side windshield, digital thermostat never indicated that the engine was hot, i smell antifreeze, water leaking inside passenger side by glove box and a


It sure sounds like the heater core, especially if you have water leaking inside the cabin. The two heater hoses only go from the engine to the firewall, and do not go into or through the firewall. They connect to the heater core right at the firewall.
Check carefully around the back side of the engine and the heater hoses, though. If a freeze plug is leaking, water will be dripping off the bottom of the engine. If it is leaking before the firewall, that would not be the heater core.

Nov 20, 2013 | 1998 Ford Crown Victoria

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Water leaking from the housing were the heater eliment is located


the heater core is bad in summer u just route your heater hose's togther where they go thru the fire-wall.put a splice between both hoseses so water wont go into heater-core in winter u need heater u must if u have to use vehicle slow-speed only remove rariator cap pressure then leak wont leak as fast u can use heater until fluid is all leaked out or u can just move heater slide to blue area then water wont be going to heater core it wont leak out as fast or replace heater core

Dec 27, 2011 | Cars & Trucks

1 Answer

1994 Caprice LS. Little to NO heat.


It will be the heater core. If you can smell it inside the car and it's steaming up the windows the core will need to be replaced. Remove the heater core housing and check to make sure its leaking from the core itself. You might get lucky and have a leak from the hoses running to core instead. Hope that helped.

Nov 17, 2011 | 1994 Chevrolet Caprice Classic

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Leaking antifreeze between firewall and motor on passenger side. just started when i tried to use the heater. could it be the heater core and where is it located


Could be the heater core, or where your heater hoses connect at the firewall. Heater core leak would more than likely put steam in the vents of you car when heater is on and hot and fan on. If the leak is just in the engine compartment, it`s a hose or a loose connection.

Apr 18, 2011 | 2002 Pontiac Montana

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Defrosting vent is steaming out and smells like anti freeze. would it be heater core


It sounds like it, feel the rug on the passenger side if its wet then that will confirm a heater core problem.

I hope this helps you out, if it does any positive feedback would be appreciated. Thank you.

Apr 09, 2011 | 2004 Ford Freestar

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We just bought a 1999 GMC Jimmy and the heater doesn't work. The fan blows but there is no heat. The air conditioner works fine.


Could be that the heater core is disconnected, there are two hoses that attach to the heather core that come out of the engine, this provides hot water to the core thus making the heater work, when the heater core starts leaking water the quick and fast fix would be to bypass the heater core and connect the two hoses together, check under the hood on the left passenger side there should be two hoses about 1" thick see if there are connected together or of they seem to be connected to 2 outlets that come out of the inside of the vehicle. people do that specially if selling vehicle.

Sep 06, 2010 | 1999 GMC Jimmy

1 Answer

My 1996 Cadillac Sedan Deville heater blows cool air and engine is running at normal temps. It never seems to get up to temperature.


If you are not the original owner, the previous owner may have bypassed the heater core. The heater core is like a small radiator that has hot water running through it from your motor. It is inside of your dash board, near your a/c and heater controls. That is how yur car gets hot air. The air runs through the heater core making it hot. Bypassing it is a cheap and quick fix for a leaking heater core. When they get a leak, they leak all inside the car down to the floor board. Check under the hood along the fire wall. If it is bypassed, you will see two hoses spliced together. One will be bigger that the other slightly. If this is your problem, you are more thatn likely need to replace your heater core

Dec 12, 2009 | 1996 Cadillac DeVille

2 Answers

Prizm overheats, heater core leaks, no heat


You can bypass the core or fix it that's up to you but I would change or remove the thermostat first. If it still overheats then start looking at the water pump and radiator. Hope this helps. Good luck.

Jun 09, 2009 | 1993 Geo Prizm

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