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Thread: Found out why I have an oil leak.

  1. #1
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    Found out why I have an oil leak.

    Noticed an oil leak from the left side valve cover. This is what I found. Now what?
    90442970-AE58-45C2-A28B-7EFDF327FFFA.jpeg
    Last edited by eastbay; 06-11-2022 at 04:44 PM.

  2. #2
    Registered User GTRider's Avatar
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    Pull the head, have a machine shop do a weld buildup to replace the missing material including the threaded hole, and remachine the hole and do a very light skim cut on the mating surface.

    Its not a good candidate for in situ repair nor bodging up with epoxies and such as Im sure someone will recommend.

    Best,
    DeVern
    DGerber
    1983 R80ST 1984 R80 G/S-PD 2004 K1200GT w/Hannigan S/C 2010 K1300GT 2018 R1200GS
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  3. #3
    Registered User dieselyoda's Avatar
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    Quote Originally Posted by GTRider View Post
    Pull the head, have a machine shop do a weld buildup to replace the missing material including the threaded hole, and remachine the hole and do a very light skim cut on the mating surface.

    Its not a good candidate for in situ repair nor bodging up with epoxies and such as Im sure someone will recommend.

    Best,
    DeVern
    But....A very highly skilled welder using a 0.50mm torch tip on their TIG and 100% Argon with a 6mm carbon down the centre could come close to machine shop quality.

    Totally agree, never seen an epoxy/liquid metal or even low melt aluminum solder stand up.
    1997 R1100RT, 1981 KZ 440 LTD, R80RT, R90/6 sidecar, K1100RS,1983 K100RS (Cafe now)

    The major civilizing force in the world is not religion, it is sex.

  4. #4
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    A good guy with a TIG and a few tools could do it right on the bike. No need to pull the head.
    From the only real Fargo, ND!

  5. #5
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    I was able to insert a helicoil and was able to tighten bolt to spec. fingers crossed.

  6. #6
    Left Coast Rider
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    Quote Originally Posted by eastbay View Post
    I was able to insert a helicoil and was able to tighten bolt to spec. fingers crossed.
    Finish the job with a liberal (or conservative, depending on political leaning) coating of JB Weld.

    Yes, I'm kidding.

    Hope the helicoil works out!

  7. #7
    Registered User jrogers's Avatar
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    Band-Aid

    I hope it works out for you but I think it's a Band-Aid.
    02 R1150R ABS, 04 R1150R, 04 R1100S BCR, 05 R1100S BCR, 16 S1000XR

  8. #8
    If the helicoil does not work, another attempt could be made with a time-sert. The helicoil is a coil of square cross section wire whereas the time-sert is a bushing the has threads on the inside and outside of the bush.

    https://www.amazon.com/TIME-SERT-M6x...5061950&sr=8-3

    515+Y3d9T7L._AC_.jpg

  9. #9
    #13338 PGlaves's Avatar
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    The capscrews that engage those holes are "shoulder bolts". Then snug to the shoulder and no tighter. They need to be snug enough to keep from falling out. That is their job. The valve cover simply rides on the compressed rubber retainers on each bolt and the rubber gasket(s). A Helicoil will hold here just fine. I have used them to repair this damage at least a half dozen times.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
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  10. #10
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    Quote Originally Posted by PGlaves View Post
    The capscrews that engage those holes are "shoulder bolts". Then snug to the shoulder and no tighter. They need to be snug enough to keep from falling out. That is their job. The valve cover simply rides on the compressed rubber retainers on each bolt and the rubber gasket(s). A Helicoil will hold here just fine. I have used them to repair this damage at least a half dozen times.
    tHANKS, The damage was most likely caused by overtightening.

  11. #11
    Registered User dieselyoda's Avatar
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    Quote Originally Posted by robsryder View Post
    If the helicoil does not work, another attempt could be made with a time-sert. The helicoil is a coil of square cross section wire whereas the time-sert is a bushing the has threads on the inside and outside of the bush.

    https://www.amazon.com/TIME-SERT-M6x...5061950&sr=8-3

    515+Y3d9T7L._AC_.jpg
    A proper install of a Time-Sert is a definite option if you choose not to weld.

    Follow the instructions and use Loctite Cylinder mount.

    Because you will be creating some swarf, liberally use grease around your work to catch the swarf.

    Wash with Brak-Clean and compressed air.
    1997 R1100RT, 1981 KZ 440 LTD, R80RT, R90/6 sidecar, K1100RS,1983 K100RS (Cafe now)

    The major civilizing force in the world is not religion, it is sex.

  12. #12
    Neglected Bike Adopter
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    A Time-Sert is exactly what I would've thought of for that hole, since it's effectively replacing the missing spot. Happy to hear a Heli-Coil worked well enough to hold.

    Thankfully nobody suggested JB -- while it does have plenty of emergency uses, it's pretty bad for making bolt threads. Ari Henning of Revzilla tested it in a Youtube video, and an M6 thread tapped into JB-Weld only held 3.5 foot pounds versus 14 for a Time-Sert and 20 for both Heli-Coil and a tapped hole in aluminum.
    Owner of the saddest 1997 R850R you ever did see.

  13. #13
    Pepperfool GSAddict's Avatar
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    Quote Originally Posted by eastbay View Post
    tHANKS, The damage was most likely caused by overtightening.
    Sadly, always is.
    Hand tighten until the shoulder seats. Stop.
    No need for a torque wrench.
    '
    Ufda happens..........

    Need your R11xx Hall sensor rewired? PM me.

  14. #14
    Registered User tibork's Avatar
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    And tell me this is not a crack but just appears as one because if it is might be a good time to address that as well

    90442970-AE58-45C2-A28B-7EFDF327FFFA.png
    1994 BMW R1100RS (ABS)

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