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How to replace heater core , 1997 cadillac deville

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Send your email address to, and i will send you detailed instructions in Abode PDF format,

Posted on Feb 14, 2010


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Heater core leaking

When that happens,it's time for a new one.Here's a guide on how to replace.Here's the heater core.

Jan 04, 2013 | 1997 Cadillac DeVille

2 Answers

98 caddy deville nothstar v8 how to replace heater coil have no heat and I'm loosing water somewhere

the heater core in a 1998 Cadillac is very tricky to replace.
start with getting a pressure test to determine where the exact location of the leak is, it may not be the heater core.
if you do decide to pull the dash apart to change the core make sure the battery is disconnected for at least an hour to allow the airbag system to discharge.

Oct 11, 2012 | 1998 Cadillac DeVille

1 Answer

If you smell antifreeze and heat doesnt work but blows air

you need to replace the heater core but it could be a heater hose leading to it only way to tell is to remove the entire dash and find the leak

Mar 09, 2012 | 1997 Cadillac DeVille

1 Answer

Remove heather core

Disconnect battery cable.
Partially drain engine coolant
Remove glove box
Remove A/C-heater programmer
Remove heater core cover
Remove inlet and outlet hoses from heater core
Remove 2 heater cor retaining screws.
Remove heater core
Reverse procedure to install
Fill cooling system
Perform air-mix valve adjustment procedure

Nov 27, 2011 | 1997 Cadillac DeVille

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How do i replace a heater core in a 1999 cadillac deville


Here is detailed solution on how to replace the heater core in the 1999 cadillac deville;

STEP 1 Disconnect the negative battery cable.

STEP 2. Drain and recycle the engine coolant.

STEP 3. Disconnect the heater core hoses using tool J-37097 or an equivalent.

STEP 4. Remove the right side sound insulator and the glove box module.

STEP 5 Remove the programmer shield, if equipped, and disconnect the air mix valve link.

STEP 6 Disconnect the programmer vacuum and electrical connectors.

STEP 7 Remove the heater core cover, leaving the programmer attached.

STEP 8 Remove the heater core retaining screws and the heater core.

have a nice day..

Aug 27, 2010 | 1999 Cadillac DeVille

1 Answer

How difficult is it to replace the connections to the heater hoses? They broke off trying to disconnect the hoses from the firewall.

Do you mean the pipes that come through the fire wall broke off? Those are part of the heating core. You must replace the heating core.

Jun 30, 2010 | 1997 Cadillac DeVille

1 Answer

I just replaced the pulley on my 1997 cadilic deville and now my car is overheating and i have no heat/

Sounds very much like like a water pump or pump belt problem. If there is no coolant circulating (indicated by the overheating), you will have none passing through the heater core of the car.

Dec 12, 2009 | 1997 Cadillac DeVille

4 Answers

Coolant is leaking into the passenger side of car interior 1997 DeVille happens when AC is turned on,it is not overheating it is not leaking from anywhere visible under the hood

i bet it is your heater coil located under the dash of the car. when it gets cold if its not fixed it will fog up your windows.

Aug 19, 2009 | 1997 Cadillac DeVille

1 Answer

I need step by step directions on how to change a heater core in a 97 Cadillac deville

Man you are talking one big job. Most of the dash has to come out, you need to break down and buy a manuel.

Apr 11, 2009 | 1997 Cadillac DeVille

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