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2001 Cadillac Deville Overheating

Tiny
LAURETTA ALEGRIA
  • MEMBER
  • 2001 CADILLAC DEVILLE
  • 4.6L
  • V8
  • AUTOMATIC
  • 120 MILES
My car started overheating in traffic about a month ago.
I checked all fluids and changed the thermostat saw no faulty belts or hoses
Now it overheats going a mile down the road and the message says stop engine
I have tried turning on the heat when this happens
I have tried letting it cool and rinsing off the radiator and engine compartment
It is impossible to drive I don't want to seize the motor help what else canii do
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Tuesday, September 2nd, 2014 AT 6:21 AM

8 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Are your fans working properly? They are 2 speed. If you got the car real hot you could already have serious internal damage. That engine has a lot of issues due to all the aluminum used in it. Head gasket problems are common.
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Tuesday, September 2nd, 2014 AT 7:03 AM
Tiny
LAURETTA ALEGRIA
  • MEMBER
  • 5 POSTS
Yes the fans are working
It almost seems like there is no fluid in the large radiator hose
I checked the overflow and it is full
I opened the purge hose and no fluid came out side near overflow tank

So then I reconnected it and opened the other side nothing came out this end either so then
I purged the valve and cleaned it a bit a lot of gunk in end of it
Then I reconnected itself ran car again for a bit then
I disconnected the first side near tank again and fluid came out
I then added about 90 ounces of fluid to the overflow tank since it had gone down that much
And ran it with ac on for about 15minutes and that is where I a. At
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Tuesday, September 2nd, 2014 AT 2:52 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You probably have some air pockets in the system. We use a vacuum fill tool to avoid that.
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Tuesday, September 2nd, 2014 AT 3:39 PM
Tiny
LAURETTA ALEGRIA
  • MEMBER
  • 5 POSTS
How do you use a vac fill to get rid of the air pockets
I did use a brake bleeder gadget on the purge line
And I undid the radiator hose and poured fluid in it then reattached iti ran it for about 20minutes with the ax on and it did not overheat
The next test is getting the kids to school in the morning hopefully it will stay cool
If it does not what can I try next?
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Tuesday, September 2nd, 2014 AT 4:54 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You need a special tool to do that.

https://www.2carpros.com/images/external/UVU550500.jpg
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Tuesday, September 2nd, 2014 AT 5:00 PM
Tiny
LAURETTA ALEGRIA
  • MEMBER
  • 5 POSTS
Where does the special tool attach to
Are they expensive
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Tuesday, September 2nd, 2014 AT 5:04 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
They attach to the radiator filler neck.
That one is about $80. They make a number of different ones, mostly more expensive.
They call them "Airlifts"
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Tuesday, September 2nd, 2014 AT 5:08 PM
Tiny
LAURETTA ALEGRIA
  • MEMBER
  • 5 POSTS
Thanks for the info you really helped
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Tuesday, September 2nd, 2014 AT 5:36 PM

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