Question about 2000 Cadillac DeVille

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Car is overheating

Fans are working new thermostat will not hold water

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2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). car is overheating - grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed 6 Inspect Fan Blade Broken, missing, or defectivcar is overheating - grey_line.gif). grey_line.gif 8 Inspect Water Pump car is overheating - grey_line.gif or leaking water pump. grey_line.gif 9 Inspect Intacar is overheating - grey_line.giflenum - Perform Leaking water pump gasket. grey_line.gifcar is overheating - grey_line.gifct Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. car is overheating - grey_line.gif"http://i.fixya.net/uploads/images/grey_line.gif" alt="grey_line.gif" class="h_mi" /> 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. 15 Inspect Ported Vacuum Switch Damaged, leaking, or facar is overheating - grey_line.gifacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders here is a list of things to check Shaun

Posted on Nov 17, 2008

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  • 1214 Answers

SOURCE: 98 328IS OVERHEATING AFTER CHANGING THERMOSTAT

Are you putting the thermostat in correctly? It it will not work backwards.

And to confirm that there isn't a different problem, take the thermostat out all together and see if it overheats.

Engine not fully warming up is not usually caused by the thermostat. Stats usually fail closed, not open.

You will want to check the water temperature sending unit or gauge after verify the water temperature with an external calibrated thermometer. You can attach and insulate the external thermometer to the housing where thermostat is located.


Reply back what you figure out. I will be happy to help you further.

Posted on Feb 03, 2009

  • 123 Answers

SOURCE: Mercedes 300te, overheating

put alot of antifreeze on the radiator.this just happened to me last week and now it is fine
bet it cools a bit while driving NO? and than when you stop the gage goes up

Posted on Apr 21, 2009

wyatt1582
  • 453 Answers

SOURCE: Cooling fans will not kick in.

The fans won't kick on then you need to replace the coolant temp sensor this runs your fans.

Posted on Apr 22, 2009

  • 19 Answers

SOURCE: overheating

you might have a blown head casket try due a pressure test on each cylinder and sometimes you can take a spark plug out 1 by 1 and just tap the ket so it cranks and see if water comes out of the cylinder

Posted on May 21, 2009

  • 2309 Answers

SOURCE: my 1998 oldsmobile is overheating

that leaves the radiator or the head gasket, do a compression test, look at the plugs for a whitish deposit, sure sign of coolant, good luck

Posted on May 28, 2010

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1984 f150 straight 6 300 overheating problems


-Check water. If it's low add more.
-If water is full then the thermostat is not open when temperature reach above its setting.
-Test the thermostat . If it's not working then replace new one.
-If it's working (Start to open when temperature reach about 185 and up) Then now you need to check the cooling fan sensor. If the thermostat is open but the cooling fan sensor not work and kick the fan than it'll be over heat too.

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Clarify your question. If it is overheating with the new radiator, how badly?. bubbles in the overflow tank?
Jack up front and take cap off and burp radiator overnight.
One suspects air bubbles, or the wrong water thermostat not opening for whatever reason.ensure water thermostat has a hole drilled through it

If its the electronic 'fan' thermostat, you are addressing the symptom not the problem. If the car has 300kms/150K miles, could be a head gasket leak - exhaust to water. Check radiator fluid for traces of exhaust gas.

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A few questions first...are you sure its overheating and not just a bad temp sensor? is yes then how many miles on car? if over 90K than did you have the water pump replaced with your timing belt?Is your fan coming on at all? Is your radiator full?If your water pump has been changed and your radiator is full and your fan is working properly and you have a new thermostat then you should take your radiator off and have it flow tested to make sure its operating properly, and no you cant just pour water through it to tell if its working properly.

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New water pump' thermostat,purge line. not heads or gaskets and still running hot


You say "Water pump thermostat" do you mean Thermostat or water pump? If you replaced the thermostat and still have an overheating problem then look at the water pump itself as the problem if that is replaced and you still have the problem then you have another problem in the engine or a clogged radiator core. You may have a lubrication problem in the motor, if the oil pump went out or your low on oil then the engine may be overheating from lack of lubrication. Another thing that will cause overheating is if the Fan is Electric and not activating or if the radiator fan is mechanical the clutch is not allowing the fan to rotate free when you are driving.

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1 Answer

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Make sure the fans are coming on or it will over heat. If the fans come and the gauge is reading hot check the thermostat. Follow the top radiator hose to the engine block it probably has 2 bolts holding the thermostat housing on.

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1 Answer

My 1995 dakota is overheating, replaced water pump, thermostat, fan. What to do????


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2 Answers

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Sounds like you may need a new Thermostat.

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