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  • Rocker Box Leak

    Kind of a weird one this past week. Noticed a new oil leak as I’ve been getting the bike ready for the season. Not the valve cover but the rocker spacer under it above the head. Not dripping or anything but leaking none the less. I took it apart and three of the six bolts that bolt that piece down were finger tight! It’s never been apart as far as I know. I put new gaskets in and retorqued everything and all seems good after a quick 10 mile jaunt. Just thought it was weird.
    "There is nothing stronger than the heart of a volunteer."
    Chris, 2004 Roadstar Silverado

  • #2
    That was an odd one. Never heard of anyone else having that issue.

    Comment


    • FDRUCaptain
      FDRUCaptain commented
      Editing a comment
      I never expected to find loose bolts inside the motor. Lol

  • #3
    med loctite is required on cyclinder head spacer and cover according to clymers, BUT I COULD NOT FIND THAT IN THE YAMAHA MANUAL. others please chime in here

    Comment


    • davej
      davej commented
      Editing a comment
      I wouldn't use any type of loctite on those bolts.

    • FDRUCaptain
      FDRUCaptain commented
      Editing a comment
      I didn’t. Just torqued to spec.

  • #4
    Apply locking agent (LOCTITE)

    LT symbol.

    Click image for larger version

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    Comment


    • FDRUCaptain
      FDRUCaptain commented
      Editing a comment
      The valve cover itself wasn’t leaking, it was the head spacer underneath. Loctite there too?

  • #5
    My bad. No, it doesn’t show using LT on those bolts.

    Comment


    • #6
      The Red Road Star I bought that needed fixing had a terrible week due to using a cereal box as a gasket LOL. I also found out that 99 to 03 and 2004 and up used a couple different when it comes to The Rocker Box bolts so you might want to double-check that but doubtful that was an issue in your case. I took both heads off completely ran the valves put everything back together and measured all the bolts got the correct ones got Factory gaskets and you just wouldn't believe it. It ran fine and didn't leak.
      LET'S RIDE

      Comment


      • FDRUCaptain
        FDRUCaptain commented
        Editing a comment
        Yes, at least in my ‘04 there are two different size bolts on the rocker spacer. And they get torqued to two different specs as well.

    • #7
      Built on a Friday afternoon close to quitting time . Kinda weird they were finger tight....never heard that before on here. Glad it was shown as a leak and not a clunk and quick stop!

      Comment


      • FDRUCaptain
        FDRUCaptain commented
        Editing a comment
        Yes sir. I even asked the original owner I bought it from. He never took it apart or had it in the shop so that definitely was weird.

      • Jclevesque
        Jclevesque commented
        Editing a comment
        Old gasket show any wear/signs of damage?

      • FDRUCaptain
        FDRUCaptain commented
        Editing a comment
        None. I even actually torqued the bolts and put it together and checked. Didn’t leak, but I had the gaskets anyway so I put them in just in case afterwards.

    • #8
      I could tell that they had threadlocker on them because it took more torque to loosen them then you would expect for such small bolts, and more then the stated torque for themin book.

      Comment


      • #9
        I had the same thing happen, the bike had just had the trans recall done about 6000 miles earlier. I used blue loctite where indicated. I think the loose bolts were the cause of a burnt valve, but I had been running the bike fairly hard on a hot day.
        It's not that life is so short, it's just that you're dead for so long.---unknown.

        Comment

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