Question about 1996 Cadillac DeVille

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96 Deville Overheating....TroubleShooting

Ok, I need help, im stumped. I have a 96 Cadillac Devillle 4.6L and I've been having problems with overheating. I've done alot of work within the last week and nothing seems to work, I've replaced the following:
Radiator
Water Pump
Water Pump Belt
Heater Core
Temperature Sensor
Thermostat
Radiator Cap

*Fans come on around 222 degrees. There's white smoke coming out of my expansion tank when I remove my radiator cap. Checked my oil, and there's no coolant in it. Also, my air conditioner doesn't blow through the vents, don't know if that would affect anything.

Please help, I'm going crazy.

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  • 2 more comments 
  • hustla_365 Feb 26, 2009

    OK, will do that.......what's a head gasket leak??? The same as them being blown or an easier fix?

  • cadi_96 Apr 13, 2009

    I have a 1996 cadillac deville with the same problem it keeps overheating however my fans don't kick on at all....

  • gregston II Apr 25, 2009

    96 deville sedan, the 4.7 liter. it has two fans behind the radiator and i have yet to see them turn on, the car will stall and overheat when the coolant temp reaches 200 F, but normal running temp is 197 F . so if i stop for a few minutes at a red light it overheats and stalls.

  • Barbara Allen Sep 05, 2013

    My fans are coming on. Tested off the car and on. Where is the temp sensor located?

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Did you run a compression check? if so and its good then you have a blockage in the water jacket
if not then you have a head gasket leaking

Posted on Feb 26, 2009

  • Christopher scroggins
    Christopher scroggins Jan 10, 2014

    would that be the mounting behind the waterpump

  • Christopher scroggins
    Christopher scroggins Jan 10, 2014

    when you mentioned a blockage inthe water jacket or am i burnt and it needs a head gasket

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Hi.. all I have a 96 deville that just recently been giving me problems my caddy has a light oil leak from the oil pan.beside that wen I start my car it shakes relly bad for the first couples of minutes and as I drive the car it throws white smoke out the tailpipe relly bad can any one please help me going crazy trying to figer out what can it be

Posted on Jul 27, 2013

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Posted on Jan 02, 2017

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Hello rankflynn1 and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1998 Cadillac DeVille, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose an overheating Cadillac engine

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

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My 96 cadillac is overheating. It idles fine. I get on the road and thats when it starts running hot. I replaced the water pump housing and hoses also the thermostat. Its losing a little coolant but dont...


Hello rileystephan

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1996 Cadillac DeVille, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose an overheating Cadillac engine

Anyways, if that helps you, then you can even follow me on Twitter, for more great tips and tricks that will help you save a ton of money on car repairs. That one is at: twitter.com/acoates23234

Thanks for asking, and good luck!

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