Question about 1997 Chevrolet Cavalier

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Overheating fast take thermostat out takes 40 minites to oberheat blows air bubbles back through the coolant reservoir

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You have a cracked head or a blown head gasket

Posted on May 28, 2010

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Blown head gasket or head warped

Posted on May 31, 2010


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2006 infiniti m35 over heating.. had a crack radiator change the thermostat fill the coolant the cooling was empty still overheating where to fluctuate from regular normal temperature too high back to...

heater core does not have anything with overheating!! water pump and possibly blown head gasket will however is the overflow tank blowing water out . when cool remove rad cap and watch water as the motor gets hot if you see bubbles the head is gone

Mar 26, 2015 | 2006 Infiniti M35

2 Answers

2001 f250 overheating

Check for cracks in the system. It sounds like you have too much air in it. If you are driving, does the temperature gage fluctuate? The cap is designed not to leak, but hot compressed air will blow by it. When it does, it easily confused as coolant "purging" out of the system, but really it is steam and air. By removing the thermostat, you are fully opening the coolant cycle and the water is free to circulate. Also, with the thermostat removed, the system can't build up enough pressure because it is open to the collector bottle, which in turn is open to the atmosphere. The system is designed to work under pressure so you should keep the thermostat in. That said, try to purge the system. Remove the thermostat, plug the overflow tubes, and pull a low vacuum on the reservoir (collector bottle). You want to make sure the reservoir is about half full. My personal experience is using about 5 to 6 inches of vacuum pressure for about 30 minutes. If there's lots of air, you will see bubbles in the reservoir. And as long as you have enough coolant in it, when you remove the vacuum, it will not draw air into the system, so make sure there's enough coolant in the reservoir. I am not sure about this truck, but some vehicles actually have a purge valve on the main coolant line close to the thermostat, and usually at the highest point in the system. It looks like a Schrader valve. So, if you have this, let the car cool down, put some rags around the purge valve, remove the valve cap and purge away (like letting air out of a tire). You'll have to do this a few time after driving to completely vent the system. Finally, if you do overheat again and start spewing coolant, before the car has a chance to cool down, fill the reservoir with coolant at least up to the hot level mark. That way, when the engine (and coolant) cools down, it will draw the fluid into the radiator. Otherwise, you just end up pulling more air into the system making the problem worse. Hope this helps.

Feb 12, 2014 | Ford F-250 Cars & Trucks

1 Answer

Bleeding cooling system

sounds like air in system ...
Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.
Keep an eye on the temperature gauge throughout this process

  • Refill the radiator to the top and coolant reservoir as needed. Put the radiator cap back on. Note that if the engine runs hot after this procedure there may have been another pocket of air that "burped." Let the engine cool down and then add more coolant to both the radiator and the coolant reservoir.
  • Apr 18, 2013 | 1998 Chevrolet Cavalier

    1 Answer

    2003 Lincoln LS V8 3.9. It was overheating. I replaced thermostat housing kit with thermostat and coolant reservoir. the coolant temperature gauge stops straight horizontal, at this time the car diagnostic...

    I dont think the coolant is boiling, I think you have an air bubble in your system wich is causing a air lock and youll need it flushed out. Your reservior cap should be tight always.. never loose this is an air tight system and your allowing it to get air in it. I have a 2002 linc ls and just had to pay 1000.00 to replace the system because I let an air lock go for too long and had so much back pressure I blew up my reservior.

    Aug 31, 2010 | 2000 Lincoln LS

    3 Answers

    My 98 windstar is randomly overheating and no heat

    try changing the thermostat for starters.

    Dec 20, 2009 | 1999 Ford Windstar

    1 Answer

    Mechanic went to change out the thermostat on the 03 Cruiser...drove it back to me..overheated when he got it back...removed the thermostat to see if that would at suppress the overheat problem until the...

    Removal of the thermostat from the cooling system is not a good idea. This upsets the coolant flow rate in the system, and that can cause the engine to overheat, even when no other problem with the cooling system exists.

    Try to identify the cause of the overheating.

    Ensure that engine tune, or other engine mechanical fault condition is not the cause of the overheating, then go through the checklist following:-

    1) Check engine cooling fan/s are operating as required when engine temp rises above cut-in threshold - check fan control relay is ok,
    2) Check for collapsing radiator hose on suction side of water-pump when motor revs raised above idle.
    3) Check coolant reservoir pressure cap is serviceable,
    4) Check coolant system is properly filled - carry out any bleed off procedure specified to clear any air locks- (ensure heater core coolant flow is turned on).
    5) Check for combustion gas bubbles in the coolant reservoir while the motor is running - this indicates a blown head gasket. If in doubt, take it to a radiator shop and ask for a combustion gas check on your radiator.
    6) Check condition of radiator core:-
    i) for blockage of air flow to (bugs/grass etc),
    ii) for core internal blockage to coolant flow,

    If all above ok, replace the thermostat again (also ensure it is not installed upside down) - faulty new thermostats are not unheard of.

    Oct 20, 2009 | 2003 Chrysler PT Cruiser

    2 Answers

    Bubbling during idling or low speed

    you mean 70-80 kph? because in mph that is very fast! check your thermostat, and if its not a problem with the thermostat sticking , it may be a problem with your water pump

    Apr 16, 2009 | 1999 Ford Crown Victoria

    2 Answers

    Overheating in 2002 sedona

    To check if it is the thermostat run the car and when the temp starts going up turn the heat on full blast in the car. If the temp goes down after you turn the heat on than it is your thermostat.

    Jan 06, 2009 | 2002 Kia Sedona

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