Coolant leaking from overflow

Discussion in 'Honda' started by DrywallDoc, Mar 18, 2018.

  1. DrywallDoc

    DrywallDoc Member

    Joined:
    Sep 29, 2015
    Messages:
    172
    Likes Received:
    21
    Trophy Points:
    59
    Gender:
    Male
    I have a cr85 that's all stock except for a fmf pipe. It won't stop leaking coolant from overflow. I switched the radiator cap off a working cr80 and still leaked. I did a leakdown test to make sure it wasn't a crank seal or head gasket leak and it held pressure. I checked the impeller and it rotates when I push the kicker down so I'm assuming it's fine. What else could it be? Radiator itself?
     
  2. Larry's Shee

    Larry's Shee Active Member

    Joined:
    May 23, 2009
    Messages:
    7,298
    Likes Received:
    574
    Trophy Points:
    149
    Occupation:
    Unemployed carpenter
    Location:
    Ortskaville, MI
    If you have one of those Lazer thermometer you could check the temps of different places on motor and radiator to see if it's plugged or something. Might try cleaning it. Also looking head or cylinder for a burp plug, might have air in system causing it to run hot.
     
  3. DrywallDoc

    DrywallDoc Member

    Joined:
    Sep 29, 2015
    Messages:
    172
    Likes Received:
    21
    Trophy Points:
    59
    Gender:
    Male
    Just changed out the radiator off a working cr80 and also cleaned all the hoses. Also burped the coolant system and still no luck. Any other ideas?
     
  4. DrywallDoc

    DrywallDoc Member

    Joined:
    Sep 29, 2015
    Messages:
    172
    Likes Received:
    21
    Trophy Points:
    59
    Gender:
    Male
    Just did a second leak test and still found no leaks. Im usng engine ice. Could a lean jetting issue cause this? Although I'm not even lean on the Jets. I'm running a 128 main and 50 pilot. There is also spooge coming out of the exhaust. Would worn out rings cause this?
     
  5. Larry's Shee

    Larry's Shee Active Member

    Joined:
    May 23, 2009
    Messages:
    7,298
    Likes Received:
    574
    Trophy Points:
    149
    Occupation:
    Unemployed carpenter
    Location:
    Ortskaville, MI
    Well snap. Is it puking all the coolant out? There has to be some space for expansion as it heats up. Maybe take a water or pop bottle,drill hole in cap, attach it to bike and ride it to see how much it pukes. Never mentioned if it is overheating.
     
  6. DrywallDoc

    DrywallDoc Member

    Joined:
    Sep 29, 2015
    Messages:
    172
    Likes Received:
    21
    Trophy Points:
    59
    Gender:
    Male
    I'll try that bottle idea. I havent had a chance to ride it in a bit. I don't think it's over heating because it will hit powerband. Seems to ride good other then the leaking radiator.
     

Share This Page