Over Heating Northstar Engine
#1
05-31-2008, 01:38 PM
Over Heating Northstar Engine
I have a 1996 Eldorado which is in mint condition...however it is over heating!! I have taken it to 4 different shops 2 said it was a head gasket or craked block. 2 said it was computer failure. The cooling fans do not work when it gets hot but when I turn on the AC or Heater the fans come on. The fans should come on when the engine is hot...right? Anyone have the same problem? Please help...the dealership said it will cost me 4100.00 to fix it 
. Thanks for your help.
. Thanks for your help.
#2
06-03-2008, 02:20 PM
RE: Over Heating Northstar Engine
It sounds like you might have two problems.
If it IS a head gasket, check your oil and radiator for discolorations, oil will be turning yellow and foamy, radiator will have what looks like sludge.
Could be the temp switch for the fans, that you should be able to do yourself, the switch is usually about $20-$50 at Autozone.
It could also be the computer. Does your check engine light come on? If it does, Autozone can check it for you and tell you what troublecodes your car is throwing.
If it IS a head gasket, check your oil and radiator for discolorations, oil will be turning yellow and foamy, radiator will have what looks like sludge.
Could be the temp switch for the fans, that you should be able to do yourself, the switch is usually about $20-$50 at Autozone.
It could also be the computer. Does your check engine light come on? If it does, Autozone can check it for you and tell you what troublecodes your car is throwing.
#4
06-03-2008, 06:30 PM
RE: Over Heating Northstar Engine
good advice above ..
below is a list of threads that may also help, with special attention to the "coolant threads".
below is a list of threads that may also help, with special attention to the "coolant threads".
ORIGINAL: stomper
The BEST car Cadillac ever made is the .. you get to pick.
https://www.cadillacforum.com/m_9438/tm.htm
MY Cadillac has more miles than yours thread .. Lets get the 400,000 mile cars.
https://www.cadillacforum.com/m_12353/tm.htm
CODES .. Pulling & understanding CODES .. we need CODES to help you.
https://www.cadillacforum.com/m_18197/tm.htm
https://www.cadillacforum.com/m_17425/tm.htm
https://www.cadillacforum.com/m_11904/tm.htm
Community Services: Auto parts, Vehicle Taxes, highways cams, picture capture,
Corp 800 #’s, unique shipping services .. etc ... take a look.
https://www.cadillacforum.com/m_9880/tm.htm
Average age of our Cadillac owners .. where everyone says they are 23.
https://www.cadillacforum.com/m_931/tm.htm
Why you should change to coolant the day you buy the Cadillac.
https://www.cadillacforum.com/m_7193/tm.htm
https://www.cadillacforum.com/m_7388/tm.htm
Transmissions or Engines - why you do NOT FLUSH the 4100 & 4500 drive trains.
https://www.cadillacforum.com/m_6036/tm.htm
Cadillac GM e-ghosts electric problems, intermittent codes, etc.
https://www.cadillacforum.com/m_6068/tm.htm
Help from our TECHs ? You really want to read this.
https://www.cadillacforum.com/m_9792/tm.htm
Cadillac TECH FAQ MENU .. pull up all the FAQ topics
https://www.cadillacforum.com/m_6733/tm.htm
Cadillac Technical FAQ section .. everything Cadillac
https://www.cadillacforum.com/forumid_64/tt.htm
Cadillac Allante TECH FAQ .. things that the car needs often, owner’s manual, etc.
https://www.cadillacforum.com/forumid_83/tt.htm
The Cadillac Allante Pub - discuss, argue, and laugh .. Allante not needed to jump in.
https://www.cadillacforum.com/m_21055/tm.htm
Allantesource.com Allante PROCEDURES MENU .. issues that few know how to handle
https://www.cadillacforum.com/m_18287/tm.htm
Hobby Corner .. Hot wheels, trains, whatever ..
https://www.cadillacforum.com/forumid_60/tt.htm
Cadillac History .. The real McCoy, from day one.
https://www.cadillacforum.com/m_6356/tm.htm
Welcome to CadillacForuM.com
The BEST car Cadillac ever made is the .. you get to pick.
https://www.cadillacforum.com/m_9438/tm.htm
MY Cadillac has more miles than yours thread .. Lets get the 400,000 mile cars.
https://www.cadillacforum.com/m_12353/tm.htm
CODES .. Pulling & understanding CODES .. we need CODES to help you.
https://www.cadillacforum.com/m_18197/tm.htm
https://www.cadillacforum.com/m_17425/tm.htm
https://www.cadillacforum.com/m_11904/tm.htm
Community Services: Auto parts, Vehicle Taxes, highways cams, picture capture,
Corp 800 #’s, unique shipping services .. etc ... take a look.
https://www.cadillacforum.com/m_9880/tm.htm
Average age of our Cadillac owners .. where everyone says they are 23.
https://www.cadillacforum.com/m_931/tm.htm
Why you should change to coolant the day you buy the Cadillac.
https://www.cadillacforum.com/m_7193/tm.htm
https://www.cadillacforum.com/m_7388/tm.htm
Transmissions or Engines - why you do NOT FLUSH the 4100 & 4500 drive trains.
https://www.cadillacforum.com/m_6036/tm.htm
Cadillac GM e-ghosts electric problems, intermittent codes, etc.
https://www.cadillacforum.com/m_6068/tm.htm
Help from our TECHs ? You really want to read this.
https://www.cadillacforum.com/m_9792/tm.htm
Cadillac TECH FAQ MENU .. pull up all the FAQ topics
https://www.cadillacforum.com/m_6733/tm.htm
Cadillac Technical FAQ section .. everything Cadillac
https://www.cadillacforum.com/forumid_64/tt.htm
Cadillac Allante TECH FAQ .. things that the car needs often, owner’s manual, etc.
https://www.cadillacforum.com/forumid_83/tt.htm
The Cadillac Allante Pub - discuss, argue, and laugh .. Allante not needed to jump in.
https://www.cadillacforum.com/m_21055/tm.htm
Allantesource.com Allante PROCEDURES MENU .. issues that few know how to handle
https://www.cadillacforum.com/m_18287/tm.htm
Hobby Corner .. Hot wheels, trains, whatever ..
https://www.cadillacforum.com/forumid_60/tt.htm
Cadillac History .. The real McCoy, from day one.
https://www.cadillacforum.com/m_6356/tm.htm
Welcome to CadillacForuM.com
#5
06-04-2008, 06:38 PM
RE: Over Heating Northstar Engine
My guess on this one would be, a coolant temperature sensor, bad fan, or, wiring issue. How many fans does it have? On a lot of cars one or more fans come on when the AC is turned on but the AC doesn't always control the same fan as the temperature sensor. Find out if the fan comes on if you unplug the coolant temperature sensor. If it does, then there's a good test to see if the fan works.
Also, some cars have the ablity to run a KOEO test through a tester. The ones I've used test the fans and some also test the sensors.
Good luck.
Also, some cars have the ablity to run a KOEO test through a tester. The ones I've used test the fans and some also test the sensors.
Good luck.
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z24cruiser
Cadillac Seville
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1996, cadillac, engine, fan, fans, heats, mortor, northstar, overheating, problems, sencer, sensor, temperature, temperture, turn
