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overheat engine problem solved 2001 civic civics

Discussion in '7th Generation Honda Civic (2001-2005)' started by erbilabuc, May 25, 2008.

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  1. erbilabuc

    erbilabuc New Member 5+ Year Member

    Jan 17, 2008
    White Sands, November Mike
    Ok so there are a few (more like a lot) of us 01 civic owners that have the misterious overheat problem. I have troubleshooting this problem on my 2001 civic ex with 80,000 miles since January of 2008 which was when the problem started. I went from big and obvious all the way into small and complex.

    I replaced the thermostat, water pump, coolant temperature sensor, radiator, radiator hoses, overflow bottle and then came to the conclusion that I was cursed and decided since none of these fixed the problem that I would just put the old stock parts back in and get my money back.

    I have figured out that the overheating is caused by too much water in the coolant mixture and a deteriorating radiator cap. The radiator cap will work good enough to keep liquid in but as soon as the system pressurizes and the water boils (due to too much water in the mixture), the steam will leak out causing your coolant level to go low and overheating your engine and also cooking the radiator cap gasket.

    REPLACE YOUR RADIATOR CAP AND mix your coolant 75% antifreeze/ 25% water
  2. Chris.

    Chris. Stickin' it to the man Registered VIP Registered OG 5+ Year Member 10+ Year Member

    Sep 12, 2005
    i never mixed 50/50 i usually fill the radiator with 50/50 then just add straight antifreeze after that. this is on a dry engine though. i havent touched my antifreeze in my 02 since i got it.
  3. av3fenix

    av3fenix New Member 5+ Year Member

    Jul 16, 2009

    Hi, thanks a lot for your input, I really appreciate it.

    Would you care to point some more tips about it? like the amount necessary , and the right way to drain the old mixture out and replace? I've personally been using water for a long time, with little to none coolant every now and then, but I'm not sure the amounts I should use, sorry for my ignorance, and thanks for this info erbilabuc.
  4. jono237

    jono237 New Member 5+ Year Member

    Jul 28, 2008
    i always just buy the premixed bc yea im that lazy and im always worried ill screw it up somehow
  5. jonathan2006

    jonathan2006 D17A2 User Registered VIP Registered OG 5+ Year Member

    Apr 17, 2007
    Cabot, Arkansas
    i have also had this problem and found this

    that our cars dont use the normal amount of oil, they use less
    and when in the high rpms the oil doesnt get back down to the bottom of the block fast enough
    this also causes it to overheat
  6. Dakota

    Dakota Canuck Civic driver 5+ Year Member

    Aug 5, 2008
    Calgary , Alberta , Canada
    Here's the problem with mixing coolant at anything other than a 50/50 mix . Anti freeze is designed to work with water to raise the boing point and lower the freezing point . Both on their own do not work very well , but together they work great . The mixture percentage changes the properties of the mixture , with the optimal mixture being a perfect 50/50 . With any other percentage , you lower the boiling point and raise the freezing point .

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