Question about 2000 Chevrolet Impala

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Car overheats, have bubbles going back into the reserve tank while running and after shut off, have put on new thermastat, water pump 1 yr old, flushed radiator, seams ok

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I would check the head gasket

Posted on Sep 30, 2009

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1990 BMW 525i 2.5L engine overheats after rplaceing water pump, stermostat,fan clucth,radiator


There's trapped air in the cooling system.
  • You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
  • With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
  • Just keep adding water until no more air bubbles come out then just put the screw back in place.
  • Then fill the expansion tank to it's normal level/line.

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May 07, 2014 | 1990 BMW 525i

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Which hose goes where on my 2000 pontiac sunfire heater core...


are you installing the correct thermostat the right in the head or block
3 thermostats indicate incorrect fitment method
heater hoses run either way as the water is pushed through the heater core by the pump

Apr 21, 2017 | Cars & Trucks

1 Answer

I have got the head skimmed and have put in a new head gasket, timing belt and water pump. engine is running ok when its cold but when it gets hot it starts bubbling water out of the expansion tank. Have u...


Did you replace the thermostat? Does it overheat? You could have just over filled it. Just run it a couple of days and watch the heat gauge. If it keeps bubbling out of the expansion tank I would recheck the torque on the head bolts. You will have to loosen them up and retorque them in sequence, from the center back and forth out to the sides.

Nov 18, 2010 | Audi A4 Cars & Trucks

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What causes a 2002 volkswagen to overheat


start with checking coolant while the engine is cold.if up to proper level check the thermastat.waterpump?if none of those possible internal problem.headgasket

Nov 04, 2009 | 2002 Volkswagen Golf

2 Answers

Overheats when idiling and overheats , cools down , overheats when driving. Have replaced the thermostat but is still doing the same thing. There are no apparent waterleaks. No water in the oil and runs...


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!

Sep 26, 2009 | 2002 Pontiac Grand Am

3 Answers

Please Help!


YEP A BAD BELT TENSIONER CAUSES DRIVE BELT TO SLIP.CAUSING WATER PUMP TO TURN TO SLOW.CAUSING ENGINE TO OVER HEAT.

Sep 04, 2009 | 1996 Oldsmobile Aurora

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Overheating ,replaced water pump radiator


I'am not shure from your post if you changed the radiator and water pump as an attempt to fix the problem or if it started to overheat after the work was done? Either way, try a new thermostat.

Aug 27, 2009 | 1995 Chrysler Concorde

2 Answers

1995 beretta overheats


check the intake gasket they were common to go bad and start leaking make sure the water pump is good

Aug 15, 2009 | 1995 Chevrolet Beretta

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