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maher kayyal Posted on Aug 22, 2013
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I have 2003 trailblazer I've just change the water

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scrap_it

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  • Expert 87 Answers
  • Posted on Aug 22, 2013
scrap_it
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Joined: Mar 06, 2010
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Most likely has a air lock... there sho0uld be a tube that runs from water pump to thermostat housing... with a little screw on it thats where you bleed the system...turn heat full...turn set screw 1 turn till u see fluid...repeat til not over heating... once u get hot air on inside of car...should be ok

5 Related Answers

Frank Chen

  • 330 Answers
  • Posted on Jul 07, 2008

SOURCE: overheating

1. start the engine and leave the radiator cap open.
2. put a cardboard cover or a rug in the front of you radiator.
3. let it runs 20 minutes or more, see if it is overheated and see the water or coolant in the radiator circulated or not. If not, as soon as you have already changed water pump. thermostate and check the hoses, no leak, I think your radiator was blocked.


Did you put stop leak before?

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Joel Friedenberg

  • 1114 Answers
  • Posted on Jul 08, 2009

SOURCE: How to change a water pump on 2003 trailblazer 4.2

  • Remove bolts that hold fan to clutch.
  • remove 4 bolts that hold clutch to pump.

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Sep 29, 2009

SOURCE: How much labor is involved in changing a water

about 3 hours at home.

Testimonial: "Thanks, I was told twice that. "

A

Anonymous

  • Posted on Jun 17, 2011

SOURCE: My 2002 Mazda 626 overheated and I've changed the

Think about what your asking & keep in
mind, we don't have the vehicle to check out

Have you done any testing at all, that
you would like to share with us
Like battery,starter solenoid,starter

Does the overheating issue play a role?

Is the timing belt broken?

Anonymous

  • 241 Answers
  • Posted on Nov 26, 2011

SOURCE: change water pump and thermostat and it's still overheating 2006 1500 dodge ram

overheating run the a/c on make sure the fan working .

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If you got a blown head gasket, water is getting mixed with your oil, pretty much ruining it, and your oil's viscosity will be affected, causing oil pressure to drop and your light turns on.

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If your gasket is blown you need to fix that asap, then identify where is your coolant leak/blockage that causes alleged overheating, doing a coolant flush might help. Good luck.
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My car keeps overheating..what keep causing this??

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I replaced water pump on my 2003 Trailblazer and now the fan will not run. What might the problem be?

is it overheating?? i would most likely say if it is overheating then you may have air in the system. after replacing a water pump you let alot of air into whats supposed to be a sealed air tight system. try bleeding the system real good because if there is air in it then the fan switch may not be getting a temp reading. hope it helps if not post back i got a few other ideas good luck
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Hello, My trailblazer was overheating to hottest few days ago! first I replaced the thermostat, the problem was going on so I replaced water pump, fan clutch, checked and cleaned radiator three times and...

check for a blown head gasket, do a compression test on all the cylinders, they should all check out to about the same , if 2 are off you have a bad gasket
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My trailblazer keeps overheating and I'm not sure why. I have already replaced the radiator, water pump, thermostat, and clutch fan. Is there anything else I can do?

There may be an obstruction in one of the hoses, there may be an air pocket in the system somewhere.
Are you sure there is actually an overheating going on? Maybe it's a bad temperature sensor or temperature gauge stepper motor.
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