Question about 1989 Jeep Cherokee

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Still Over heating after many trys!!!

Kay so the deal is i had fix the thermostat back in march and just yesterday i changed my water pump but its still over heating. the coolant leaks out of resevior tank as its on then once you shut it off the resivor eptys back out either back into the radiator or the blck wat shud i do next? shoud i rechange the thermostat?

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  • ayla_shea06 Jun 21, 2009

    the car will start smoking after being on a period of time wit air on

  • ayla_shea06 Jun 21, 2009

    i did the big sealant flush thur the car i have ran the car many times to the point of overheating could that have be the reason the thermostat is not working

  • Ned C Cook
    Ned C Cook May 11, 2010

    ok, heres the deal. the coolant recovery is working fine. What gives rise to suspect overheating?

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Try overhaul radiator... maybe thick scales are already forming on it... check it oit...

Posted on Jun 29, 2009

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If that dosent work pull your plugs and see which one is soaked with water

Posted on Jun 27, 2009

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Iss the fan coming on?.If it heats up moving or ifling, Yes, The thermostatis in question. Speeds under 35, the fan is in question. Over 35 mph, the fan is negated by the ram air effect through the raddiator, so if it heats up above 35, thermostat issues. The thermostat should be removed when flushing cooling system. If your radiator cap vents below 12 lbs, The cooling system will perge . The pressure in the radiator maintained by the cap raises the boiling point. One lb. of pressure raises boiliing point by 2 degrees, so a good cap is a must. Let the engine cool and when you start it immediately look in the recovery bottle. the overflow hose tip submerged, look for bubbles.. If you see smokey little bubbles you have a combustion leak into the cooling system. If I confused you, let me know

Posted on Jun 21, 2009

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I would flush out the whole system. sounds like something is building back-pressure. If you do re-chande the thermostat, get a 'fail-safe' one that remains open if it fails. If this does not solve the problem, it may be a blown head gasket...this would also cause back pressure in the cooling system by allowing the the fireing pressure to escape through to the cooling system.

Posted on Jun 21, 2009

  • bkauffman1 Jun 21, 2009

    yes, the thermastat could have failed due to severe heat and then re-cooling several times

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