Overheating issue

Discussion in '6th Generation 2002-2013' started by Vfrhooligan24, Apr 19, 2018.

  1. Vfrhooligan24

    Vfrhooligan24 New Member

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    Recently purchased an 04 vfr800. After a quick ride home I noticed a coolant leak took the radiator to a local shop and they fixed it for me. I put everything back together filled it with coolant and let the bike idle until the fan kicked on just to make sure it would. The fan did it's job so I figured life was good put the fairings back on and went for a quick ride roughly 6 miles to the next town. By the time I got there the temp was reading 220 and my fan still wasn't kicking on. I checked my connection to the harness from the fan and the thermostat and found the spade terminal had a loose connection after fixing it I've let the bike idle up to temp again several times without the fans ever kicking on. Kind of at a loss as of now wondering if my thermostat might have quit or possibly my fan? I've always maintained my own bikes so I'd rather not take it to a shop and it be something simple that I've overlooked. Has anyone else dealt with a similar issue? Thanks in advance for any advice
     
  2. Terry Smith

    Terry Smith Member

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    You can check the fan operation by pulling the female spade terminal off the back of the thermoswitch, and jumpering it to a good ground point. The fan motor is always fed with power, the thermoswitch completes the ground path.

    For your overheating, I'd double check that the radiators and engine are properly filled, and don't have any airlocks. Usual pratise is to leave the bike on the sidestand with the rad cap off, and start and blip the engine to drive out any air.

    If the engine was full you may then need to replace the radiator cap; if it won't hold pressure, you can have localised boiling taking place, this may also lead to coolant being blown out of the reservoir.
     
  3. Lint

    Lint Member

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    Take your right fairing off. Put your bike on the kickstand. Remove the radiator cap. Now start the bike and occasionally blip the throttle. Sounds like you have air trapped in the system. Being on the kickstand puts the right radiator highest. Blipping the throttle gets trapped air out. Been there, done that. Go to AutoZone or any auto parts dealer and get a new cap. Less than $10 and you have a new one. Don't go to Honda. They want $25 for the same damned thing.
     
    Last edited: Apr 20, 2018
  4. Lint

    Lint Member

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    20180419_131316.jpg
     
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  5. Vfrhooligan24

    Vfrhooligan24 New Member

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    Ok thanks for the help I had already done the throttle blip to get the air out but no one had ever specified to put it on the kickstand I've had it on the center stand
     
  6. VFR4Lee

    VFR4Lee Member

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    Left lowest if on the side stand. :Yo:

    Check fuse too.
     
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  7. squirrelman

    squirrelman Member

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    yes, could be a bad (stuck closed) thermostat.
     
  8. Lint

    Lint Member

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    Thank you. I corrected that. Good catch!
     
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