Spit out a bolt.

Discussion in 'Airheads' started by neepuk, Apr 19, 2014.

  1. supershaft

    supershaft because I can

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    I do see a reason to remove them during head rebuilds in order to properly clean the heads. Through customer's bikes and my own, I have dealt with a lot of these for a lot of miles. They need nothing to stay in place but a aluminum crush washer, anti-seize, and proper torquing. Proper torque? Look up what the sump drain plug gets.

    I don't believe Euro models had the system at least up til '85.

    BMW has prided itself on being 'green' for years now. For instance, no one forced BMW into putting cats on oilheads but cats they do have. I don't think anyone forced BMW to use air pumps on their bikes. Not at first anyway but I don't know for sure. Ca. did force them into using their anti-evap system on their gas tanks and engines.

    Complain about emission regulations? Go live in Peking!
    #21
  2. neepuk

    neepuk Such a drag...

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    Got an m-16 x 1.5 drain plug and crush washer from Napa. I used red locktite and torqued it to 26 lbs.... Done.
    #22
  3. Thorazine

    Thorazine Likes exhaust fumes

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    Good!

    Pic? Heard about the mod; I've never seen what they looked like patched up.
    #23
  4. supershaft

    supershaft because I can

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    I have seen so many troubles started just like this. Something comes loose for not being tightened properly. Then whatever gets over tightened with red Loctite. It's a sure road to stripping threads one way or another. I have seen this play out SO many times working with other mechanics. You can't win for losing.
    #24
  5. neepuk

    neepuk Such a drag...

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    I'm sure glad I didn't over-tighten it then... All is well and I will most likely never have a reasonable need to pull the plugs out of there again. The other side was way tighter to remove than it is now and the threads are peachy-keen.
    #25
  6. supershaft

    supershaft because I can

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    Reasonable need to pull the plugs? Rebuilding the heads is a very reasonable reason to pull those plugs. They don't need Loctite and they don't need to be tightened that tight but other than that . . . ? Flawed method but hopefully whoever will be fine removing them when the heads need rebuilt. Those threads need anti-seize, not Loctite.
    #26
  7. Tom48

    Tom48 Been here awhile

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    My 81 R65 and my 83 R80RT had this
    feature. I left the system intact when I sold both bikes
    US motorcycles
    #27
  8. neepuk

    neepuk Such a drag...

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    Seeing how locktite begins to release itself at temps between 300 and 400 degrees it pretty much acts as anti seize in the capacity in which I used it. If they need to come out they'll come out just fine with the engine warmed up or a little extra heat to them. I see where you're coming from, I really do, and I respect your concern. I'm just going to leave well enough alone and if I ever need the plugs to come out I'll be sure to pull then once they're well heated. All is well.
    #28
  9. ducsingle

    ducsingle Been here awhile

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    I've read about this happening before.

    If I had the heads off, I would have those holes welded shut using an aluminum plug. Cost would be minimal.
    #29