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My car is overheating. Tried a few things but nothing is working

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    #1

    My car is overheating. Tried a few things but nothing is working

    I just bought a 93 accord ex this morning and its temp gauge is already saying it's running hot. I parked my car at home and took my moms to get a jug of 50/50 pre diluted coolant when I noticed it. Came back home waited a little longer for my car to cool off and I filled the resovoir up. Then I took it out around my neighbor hood and it was all good so I decided to hop on the street but before I made it out the neighborhood the hand started rising again so I turned around and took it back home. Let it cool off again then poured the rest of the coolant in the resovoir. The coolant in the upper radiator hose was boiling as well idk if that helps but that's what I know. Right now I'm waiting til it cools all the way down so I can take the hose off to see if I can test the thermostat. I don't see an visible leaks so idk where the hell my coolant is going so fast. If someone could help out that'd be great. Thanks
    Tags: None
    #2
    If you were actually filling the overflow reservoir, it wasn't doing you any good. The radiator (when cool) should be filled essentially to the top.

    How do you know that the coolant in the upper hose was "boiling"? If you're going to take the thermostat out, might as well put a new one in while you're at it. I suggest getting one from Honda.


    Check your oil to make it is not a milky brown, which would indicate that coolant is getting into it (likely head gasket leak). Same thing with the coolant, if it looks like it has oil in it; likely head gasket again. If there are a lot of bubbles continuously going into the overflow tank; that can also indicate a head gasket leak from the combustion chamber(s) to the coolant passages.
    90 LX 4dr 5 spd 396,014 (sold 1/1/2022) - MRT: http://www.cb7tuner.com/vbb/showthread.php?t=201450
    08 Element LX FWD AT 229,000 - MRT: fleetw00d : 2008 Honda Element LX - CB7Tuner Forums

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      #3
      when it boils its not a 50/50 mix, id drain some out and add water. like a gallon.

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        #4
        Originally posted by illinois_erik View Post
        when it boils its not a 50/50 mix, id drain some out and add water. like a gallon.
        If it was boiling, it may also have been mostly water.
        90 LX 4dr 5 spd 396,014 (sold 1/1/2022) - MRT: http://www.cb7tuner.com/vbb/showthread.php?t=201450
        08 Element LX FWD AT 229,000 - MRT: fleetw00d : 2008 Honda Element LX - CB7Tuner Forums

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          #5
          The "boiling" could very well be a head gasket as bubbles in radiator is a sign
          sold! But here's my build thread for those interested.

          http://www.cb7tuner.com/vbb/showthread.php?t=206864

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            #6
            Originally posted by fleetw00d View Post
            If it was boiling, it may also have been mostly water.
            no. then theres a pressure leak.

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              #7
              Pure water boils at 212 F, so in normal driving it still shouldn't boil (stock thermostat is 180 F).

              At normal coolant pressure with a good radiator cap (approx. 1 atm, or 15 psig) the boiling point is about 250 F.

              Make sure the radiator is filled to the top but it sounds like you may have a head gasket leak.
              1992 EX, 306,000 miles - Track toy - M2S4, H23A1, ST rear swaybar, Wagon brakes, GC coil sleeves, KYB AGX dampers, Stoptech pads, Toyo Proxes R1R, 2.25" exhaust



              Stock F22A6
              VIR, 5/22/2016: https://youtu.be/eR5-ylSPsxk

              H23A1 powered
              NCCAR, 9/4/2016: https://www.youtube.com/watch?v=TI5WpxGrEpE
              CMP, 10/16/2016: https://youtu.be/DOqoe5f-GLY

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