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2002 Chrysler PT Cruiser Question: overheating

 

Question

triump 68, 2.4L 4 Cylinder, Williamston, SC, July 16, 2010, 23:49
 Enthusiast

the car ran hot spit some water out I replaced themostat and coolant.Drove it for about 4 weeks the temp went up above nomal I changed the themostat again flush rad out added new coolant.now it will run nomal sitting still but when I start driving temp starts going up.Iam lost any sugestions would be great thank you.

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  • Answer #1

    July 19, 2010, 12:54
     Master

    There are many potential caused for this condition. Is coolant being lost from the system with no signs of external leaks? If yes, Head gasket is likely cause. If no coolant loss if evident, cooling fan operation should be checked. Fans are designed to come on at approx 220 degrees and go off at approx 190 degrees. Fan should run continously with A/C on. If fans do not come on, further diagnosis is required. Check radiator fins. If debris is evident obstructing air flow, clean as necessary. Other possible causes are clogged or partially clogged radiator, defective radiator cap or defective water pump, a loose impeller will cause inadaquate coolant flow.

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    triump 68, July 20, 2010, 00:49
     Enthusiast

    thanks johnny mopar I have checked most of all the things.It dont seem like head gasket Its not losen any coolant or steaming out the tail pipe.ALL fans are working low and high speeds.Ive replaced thermostat and coolant also flused the rad the water flowed good.iam thinking water pump.Ive been told the impeller could be sliping due to the car ran hot.what do you think about that.the car is running perfect other than the rising at speed.thank you very much

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  • Medium-star Best Answer
    Visitor, August 08, 2010, 20:27

    I have an 02 cruiser with 115k miles that we bought new...we were having overheating problems and when you parked it you could hear the radiator overflow bottle gurgling and boiling...i also was noticing a few wet spots under the passenger front side....
    after reading tons of posts on several websites like this one, this is what i did....an extremely thorough cooling system flush, AND we bought and installed the following new parts.....
    aftermarket radiator (only $81), thermostat, rad cap, and the metal tube from the back of the water pump that the rad hose connects to.......and 2 gallons of the special chrysler antifreeze....
    turns out the main culprit was that over the years when i did routine checks on fluid levels, i would put in the green antifreeze and when mixed with the original factory chrysler yellow/ orange coolant will turn your cooling fluid into pudding and clog the radiator and create blockages in alot of the cooling system.....it also corroded that metal tube leading from the backside of the water pump to the radiator hose...thats where my water leak was coming from.....my old radiator actually weighed about 4 pounds more than the brand new one due to all the blockage and corrosion build up.................it has been running just fine all summer thru the 95-100 degree St Louis weather.........

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    triump 68, December 24, 2010, 21:14
     Enthusiast

    hi this triump68 Ive got same problem I have took everything apart the water pump is not the problem although iam replacing it and all the belts and the radiator but can you tell me what the rad weighes both new and old one. thanks triump68

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  • Answer #3

    February 02, 2011, 19:17
    Profile_thumbnail
     Technician

    seen this time an dtime again and every time the same thing dont know why but just like all chrysler products pull both heads and hav e them surfacced be sure to replace all head bolts and dip each one in oil for atrue possitive torqe .

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