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Thread: F650gs coolant in oil

  1. #1

    F650gs coolant in oil

    My 2001 f650gs overheated due to a radiator leak,
    and now thereís coolant in the oil. Any thoughts or ideas
    on how to fix this? Head gasket? Cracked head?

  2. #2
    Fortis Fortuna Adiuvat Omega Man's Avatar
    Join Date
    Jan 2010
    Most of the time a pump-up test of the radiator is in order. Barring having the real kit, pump sorta looks like a sports ball pump, I have drilled a hole in a (spare) radiator cap any used low pressure to check and listen (gurgling) for the air leakage and where itís coming from.

    All that said, chances are itís a head gasket especially if the bike had been run hot at one time. Most repairs are going to require some disassembly. Some changes in coolant (anti-freeze) actually helped degrade the head gasket over time.
    Let us know how you make out.
    Good luck.
    "You can do good or you can do well. Sooner or later they make you choose". MI5
    Moderator Team.
    2009 F800GS 1994 TW200

  3. #3
    I would also suspect your water pump seal.

    Here is the best resource for F650 Tech.

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    Also, Flash412.

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