What is this hose and Coolant Leak?

Discussion in '5th Generation 1998-2001' started by faran, Jun 24, 2018.

  1. faran

    faran New Member

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    So I have drained old coolant, once I poured new coolant back I am seeing a coolant leak from water pump area. It's dripping all the time and bike has not been run in last few days.

    Just checked and it's dripping at this second too.

    Where would it be coming from? Can it be a hose leaking or a leak from water pump weep hole? Also,while trying to find source of the coolant leak(, this hose came right off in my hands; is it from the tank(fuel tank overflow), a vacuum hose or a coolant one? Because I can see tank has both vacuum and fuel overflow hoses connected, unless some else has connected something else there? :(

    Please see picture and thanks for your help :)

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    [​IMG]upload image
     
    Last edited: Jun 24, 2018
  2. 34468 Randy

    34468 Randy Member

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    I would start by carefully and completely wipe down your water pump area and get all the exsisting coolant cleaned up. Then watch for a new drip in that area and carefully look to see if it is coming from the pump or does it originate there. I suspect that there is at least a leak from the gasket in the water pump. Once that is dealt with or eliminated, you can search further from that point further.
     
  3. Terry Smith

    Terry Smith Member

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    The "spare" hose is probably from the fuel tank vent; they can sit down on the rear headers and melt through. Should be a matching hose running under your fuel tank to a plastic elbow joint near the underside front of the seat. The other two hoses are the coolant reservoir overflow (the one dripping some condensation, that is normal) and the fuel tank overflow.

    If the leak is not at the pump, it may be from the area within the V where the thermostat is located, mine starter leaking there.
    upload_2018-6-25_15-35-53.png
     
  4. stubbs

    stubbs New Member

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    I had a similar coolant drop when I got my bike, and it turned out to just be the old hoses connected to the water pump. I took them off, cleaned the crusty end of the hose and the water pump end, then clamped it all tightly back in place and it hasn’t dripped since.


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  5. faran

    faran New Member

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    Thanks, I'll take your advice and clean it up well, because I didn't have any coolant leak before I drained the coolant. SO maybe a similar issue, else gasket for the water pump.
     
  6. faran

    faran New Member

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    Thanks TS.

    I pulled the fuel overflow hose coming out of the tank and for some reason I didn't see a T(elbow joint) and it was cut to a shorter length, maybe some hacking?

    Fuel vent hose seems to be a lot smaller in diameter than overflow one though, so this 'spare' one more seems to be fuel overflow one?:Crazy:
     
  7. Darth Vader

    Darth Vader New Member

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    The drip is coming from under the water pump drain bolt, have you tightened it up with a new copper washer ?
     
  8. faran

    faran New Member

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    Thanks, I actually never opened the drain bolt. I just removed the whole hose going to water pump and that's how I drained the coolant.

    But I am still going to check it.
     
  9. Darth Vader

    Darth Vader New Member

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    It must be the hose not seating properly. Id pull it off and using some wire wool clean the stub really well and check inside the hose too for crusty debris. Get the mating surfaces clean ,It can only be this joint.
    Hope you get this sorted i hate it when my ride leaks fluids
     
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  10. faran

    faran New Member

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    Update, hose was cut for some reason and yes it was a fuel overflow hose.

    Coolant was coming from one of the hose not sealing properly on water pump body, have tightened up the clamps and keeping my fingers crossed. Can I use some teflon tape or similar on water pump before I slide coolant hose on to it?
     
  11. RllwJoe

    RllwJoe Member

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    I wouldn't use teflon tape or any other additonal item in an attempt to help seal the hose. If the hose and clamp are in good shape, a properly tighened clamp should be all that is needed.
     
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