Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Coolant leakage  (Read 890 times)

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  • Online Pauli363   gb

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    Online Pauli363

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    Coolant leakage
    on: Jun 15, 2022, 11.11 pm
    Jun 15, 2022, 11.11 pm
    OK folks.  Just picked up my bike at the weekend (delighted with it).  Only issue until tonight I noticed was a leaking fork seal.  I'll post about that separately.
    I drove it home 300 miles from the dealers on Saturday with absolutely no issues.

    After spending a few days giving the bike the once over in my garage, cleaning and waxing (as you do), I took it out tonight for a few hours run to the coast and back.
    I drove 40 miles, then stopped to get a breather and took a few pics of the bike.
    I had stopped and got off the bike but left the engine running.
    It was like that for maybe 5 minutes, and as I was taking a few pics, I notice a fair amount of coolant pouring out from the lower fairing just in front of the stands, about the oil filter area.  It was steaming hot.
    I checked the dash and the thermostat had risen to all but one bar.
    My butt cheeks tightened as I was 40 miles away from home and afraid I may not make it.  So I immediately took off again.  Within a minute of two the temperature had returned to normal.  I stopped at a petrol station after about 20 minutes.  Left the bike running a few minutes and no coolant leak at all.
    I took off again, and all was normal until I got home.
    I left the bike in idle again for about 10 minutes.  No coolant leak, but the thermostat went right to the top, the red warning light came on.
    I turned the bike off and after 15 minutes it was back to the normal temp.
    Im confused, because it was peeing coolant one minute and then not the next, and then overheated to the point the red dash light came on.
    When I stopped the engine, I could clearly hear the coolant boiling like a kettle for about 6 or 7 minutes until it cooled down.
    I'm wondering is there not enough coolant?  but given if that, why would it be pouring out when idle on one occasion, but not when sitting idling 20 minutes later?
    Ive checked a few similar posts here about the radiator cap etc, but can anyone shine a light on what may be going on here?

    Below is a pic of my bike when I stopped.  You can clearly see the coolant running out the bottom.

    Last Edit: Jun 15, 2022, 11.13 pm by Pauli363

  • Online Trophyed-Up   us

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    Re: Coolant leakage
    Reply #1 on: Jun 16, 2022, 12.34 am
    Jun 16, 2022, 12.34 am
    Did you hear the fans come on?  I would check the coolant level. 

  • Offline Coconut   gb

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    Re: Coolant leakage
    Reply #2 on: Jun 16, 2022, 06.35 am
    Jun 16, 2022, 06.35 am
    Definitely check the Fans are both working - they would normally come on above 4 "bars", maybe 5,
    and should prevent the engine from getting any hotter than those 5 Bars.

    If the Fans aren't working, when you stop there is no air circulating across the radiator
    to dissipate the heat and the temperature will continue to rise.

    The coolant that leaked out was due to the expansion from over heating,
    but there may still be enough coolant in the system
    to keep the temperature under control when moving.

    Check the level in the Expansion Tank ( within the front wheel arch )
    when the engine is COLD and top it up with the correct grade of coolant as required.

    If the Fans are not working, check the Fuse,
    ( Fuse No.3 - 20A, of the Rear Fusebox under the left Side Panel )
    and check if the Fans can be turned by hand.
    Some Members have reported seized fans that may cause the Fuse to blow.

    Cheers  :821:





  • Online Pauli363   gb

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    Online Pauli363

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    Re: Coolant leakage
    Reply #3 on: Jun 16, 2022, 01.20 pm
    Jun 16, 2022, 01.20 pm
    Excellent Coconut.  I cant remember hearing the fans, but I will check that today.  Ive also ordered the correct coolant to top up, and just for security, a new radiator cap.  What do I have to do to get to the Rad cap.  Does it involve much of a strip down?

  • Offline Coconut   gb

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    Re: Coolant leakage
    Reply #4 on: Jun 16, 2022, 03.54 pm
    Jun 16, 2022, 03.54 pm
    From Memory, You only need to remove the left side Infil panel within the front wheel arch
    ( 2 Button Head bolts - 5mm Allen Key ), and possibly the horizontal panel directly underneath the
    headlamp ( 2 more of the same type of bolt ), and you can reach up and get at the Radiator Cap.

    ( That's left as if you were sat in the saddle, it will be on the right
    as you look into the wheel arch from the front of the bike  :164: ! )

    No need to remove the main Fairing !  :028:

    Cheers  :821:


  • Online Pauli363   gb

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    Online Pauli363

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    Re: Coolant leakage
    Reply #5 on: Jun 16, 2022, 03.57 pm
    Jun 16, 2022, 03.57 pm
    Many thanks!

  • Offline digital   es

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    Offline digital

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    Re: Coolant leakage
    Reply #6 on: Jun 16, 2022, 05.55 pm
    Jun 16, 2022, 05.55 pm
    As Coco says, first see if the radiator fans are working.

    It is important that when these types of checks are made, you remove the fuse from the headlights, if you keep them on for a long time, the optics of the lights will burn out.

    If you ever leak coolant, make sure 100x100 that the coolant is being pulled through the tube that comes from the surplus coming from the expansion vessel.

    In the Trophy it can happen that when the temperature overheats, there is a dilation in the water pump outlet and the hose is somewhat short and its flange loosens, the mouth of the hose is under the alternator and to tighten its flange is necessary and a somewhat long Allen key screwdriver, depending on the case, you need to illuminate that part with the light of a mobile phone or flashlight.

    If you pour coolant through the mouth of the mentioned sleeve, the sensation is the same as if you pour coolant through the tube coming from the expansion vessel, since both travel the same path.

    In the case of the coolant, if you throw it away through the surplus coming from the expansion vessel. There can be several reasons.

    - One or both fans do not start.
    - Faulty thermostat (due to dirt, etc.).
    - Faulty radiator cap.
    - Air in the cooling circuit, (in this case it will be necessary to purge the circuit).
    - The coolant has lost its properties so it doesn't do its job. (Needs to be replaced).
    Last Edit: Jun 16, 2022, 05.59 pm by digital
    Only motorcyclists know why dogs stick their head out the car window.


  • Online Pauli363   gb

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    Online Pauli363

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    Re: Coolant leakage
    Reply #7 on: Jun 16, 2022, 06.02 pm
    Jun 16, 2022, 06.02 pm
    thanks digital.  I am going to start looking at it tonight.  thats helpful.

     



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