Question about 1991 Toyota MR2

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Cooling system bubbling

Hi, i have a 1991 mr2 , i do everything to bleed my cooling system and teh car still bubbling and the coolant comes out when i shut off the car.
my car does not have heater (is eliminate in puerto rico).I think that is make it easy to bleed.i rebuild the engine complete and i presurized the head cylinder.if you have any solution to my problem please send me back.
thanks ,
Renny

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  • a1motionfork Jan 24, 2009

    the filler neck and the radiator cap is new ,oem.

  • a1motionfork Jan 24, 2009

    13 psi ,but first, the coolant was bubbling before comes out from the coolant reservoir tank.

  • a1motionfork Jan 24, 2009

    yes it has a thermostat and runs like 160f -170f.

  • a1motionfork Jan 24, 2009

    I WILL TRY IT !

  • a1motionfork Feb 06, 2009

    HI TROY I STILL HAVE THE PROBLEM WITH THE COOLING SYSTEM,WHAT MOR CAN I DO?

    ARE THE SOLUTIONS FINISHED?

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Radiator cap needs to be replaced. If the cap is weak it will not hold the pressure and it will bubble back into the reservoir.

Posted on Jan 24, 2009

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  • Troy Bennett Jan 24, 2009

    how many pounds of pressure does the new cap hold? If it does not hold enough pressure it will still do this even if it is a new cap. 18lbs is the biggest you can get.

  • Troy Bennett Jan 24, 2009

    How hot does the motor run? Does it have a thermostat?

  • Troy Bennett Jan 24, 2009

    it may have an air lock in it (when you install a new thermostat, take an aspirin and lodge it in the thermostat and when you fill it with water, the aspirin will dissolve and you won't have air in the engine. This will work.)

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