Question about 2005 Chevrolet TrailBlazer

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I changed the thermostat... now appears to have air... ran for over hour... thermostat still wont open

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In backwards?

Posted on Mar 18, 2011

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Refilling antifreeze


After changing the coolant, the engine will need to be ran to open the thermostat to get trapped air out of the system. The heater will get hot after this is accomplished. May even take a couple of tries to get all of the air out but, be sure NOT to let the engine overheat.

Feb 19, 2015 | 2004 Kia Sorento EX

1 Answer

2004 Kia low heat at idle hiway speeds ok


1) Coolant tank may show full but radiator is low in coolant...Cold engine...remove cap...inspect coolant level in radiator...fill if necessary,,,
2) If #1 is OK, the coolant system has an air blockage...With cold engine remove cap...Start engine...Heat control on high... when thermostat opens coolant AND air will escape from radiator...there will be coolant loss...Wait until all air escapes then carefully replace cap...When engine cools remove cap and top off coolant if required.....saailer

Jan 11, 2015 | 2004 Kia Sorento

1 Answer

I have daewoo nubira 2001 i change the water pump, cylinderhead, thermostad, coolant sensor and the car when i driving and 60 miles per hour and 5 minutes the car go over the hot ant go lower like 45 miles...


-Sounds like you did not bleed air from the coolant. So the water can't go through to the thermostat .That's why it so hot to a boiling point. After that the thermostat open and now the water can go through.
-You're Okay.
-Remember. The thermostat can't open with out hot water.

Mai

Oct 10, 2013 | Cars & Trucks

1 Answer

1997 a4 se overheating.i have changed the thermostat and car is still overheating.cold air is coming from the blower.car drives perfectly otherwise.fan is not coming on.how would i diagnose the problem


Alot of time you have to bleed the cooling system after changing a thermostat it gets an air pocket in it look for a bleeder valve near or on the thermastat housing if so bleed it to get the air out.check the radiator and make sure its full because if you filled it up after changing the thermastat once the thermastat opened after the engine ran awhile well the cooling system needs refilled.

Mar 30, 2010 | 1998 Audi A4

2 Answers

Temp gauage rises and no sign of car running hot not leaking water no check engine light


are the cooling fans working????????????they should work with the a/c on. they wont come on with the a/c off until the engine is approx 220f

Sep 17, 2009 | 2005 Pontiac Grand Prix

2 Answers

2003 Hyuandai Elantra after driving for about an hour is it common for you engine to feel very hot? Please advise


After 5-10 of driving the engine temp. should be at 195-210 F.

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When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

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Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

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MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

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A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

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Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Aug 14, 2009 | Hyundai Motor 2003 Elantra

1 Answer

Car wont start or if started runs poorly 98 ford taurus 3.0


check the fuel pressure or sounds like mass airflow metter itself

Feb 28, 2009 | 1998 Ford Taurus

1 Answer

Heater not hot


thermostat is stuck open, needs to be changed 10-20 dollar part plus gasket 2 dollars half hour labour

Dec 14, 2008 | 1986 Volkswagen Jetta

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