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Got a 2001 buick lesbre running hot brand new thermostat what could it be

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Make sure your thermostat is not installed the wrong way like up side down. I did this once.
Is your radiator plugged or is the water pump working properly? Is the anti freeze up where it should be? What about an air lock in the system?
Just a couple of ideas.

Posted on Nov 08, 2014

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  • 17 Answers

Could be any of the following:
Low coolant level
Air in cooling system
Bad water pump

Posted on Nov 08, 2014

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Posted on Jan 02, 2017

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SOURCE: 1996 gmc sierra its running hot....and i just put a brand new

When you put New Thermostat in and refilled Radiator 1.Did you have the car running and 2. Did you have the heater turned on high. If not drain and try redoing it this way.

Posted on Jan 04, 2010

  • 11 Answers

SOURCE: what causes a 96 honda accord to run hot if the th...

Check for a small leak in your radiator. Mine was leaking on top near the cap. Had a small crack which caused my temp to run hot.

Posted on Jun 23, 2010

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SOURCE: My 2001 Buick Lesabre keeps running hot and there

maybe you have an air lock in the cooling system that would cause it to run hot

Posted on Feb 12, 2011

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SOURCE: 2001 buick lesabre is running

replacing the thermostat is exactly what i would have suggested for your vehicle for the overheating issue. try this,with the engine running at operating temperature,check to insure that the cooling fans coming on when the engines gaining temperature. your cooling fan may be going bad and not coming on when needed,in this case it may be a bad cooling fan sensor,or just a bad cooling fan altogether.with the engine running after you've driven the car until it gets warm,open the hood and look visually at the cooling fan to insure it's running{the engine fan} in front of your radiator. if it's not running {fan} check in the main fuse box under the hood for a bad engine fan relay 1st if no bad relay,then check for a bad engine fan motor.with the key switch in "off"position try to spin the engine fan manually by hand. if it does spin by hand it still may be a bad fan motor. or bad fan sensor.do you have a check engine light on? if so you can have it code read at any auto zone or advance auto for free.this may be of great assistance to you if the check engine light is on. hope this helps and thank you for choosing fixya.com

Posted on Mar 24, 2011

djkoda
  • 55 Answers

SOURCE: My 98 subaru is not

Well the gauge issue could be your Coolant temp switch is bad.But if the car is blowing hot air out when the ac is on,that can be a faulty thermostat new in the box(it does happen) or you have a airpocket in your cooling system which just needs bled out.Usually there is a small valve located near the water inlet to the engine just open it and run the engine until water starts coming out then close off.Or if the car is not running hot,then you may just have a blend door or the heater control valve under the dash stuck on heat so it is just letting in hot air all the time.Narrow down what it is not then you will find out what is doing it.Check the switch,check your bleed valve,then check your heater valve and hoses.All are fairly cheap to replace.

Posted on Aug 17, 2011

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