Engine Vibration in 08 Ultra

Discussion in 'Touring Models' started by spike_flhtcu, Dec 28, 2008.

  1. spike_flhtcu

    spike_flhtcu Member

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    I have an 08 Ultra that has developed a strong engine vibration never felt before. I hadn't started it for 2 weeks, she cranked right away, let it idle down while I wipe it down. It settled a 1000 rpm, but as soon as I started rev'ing the throttle a little, a vibration occurred at 2000 rpm enough to blurred the instruments, mirrors, and fairing. Normally, the shakes went away quickly as it rev'd over 1400 but not this time.
    I'm not sure if this is a timing issue or engine mount is loose, not sure. This is my first Harley and very curious as to whats happening.

    Any thoughts and diagnosis would be appreciated.

    Thanks
     
  2. Mavagrand

    Mavagrand Senior Member

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    do a search on these forums for crank shaft run out...not saying it is definate as there could be other reasons but some of the 08s have issues with the run out..good luck
     
  3. glider

    glider Veteran Member

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    This could possibly be the reason for the vibrations.

    Crankshaft Runout (videos) - Harley Davidson Community

    Crankshaft Runout Inspection - Harley Davidson Community

    Chain Driven Cams And A Twisting Crank - Harley Davidson Community
     
  4. spike_flhtcu

    spike_flhtcu Member

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    The more I read about the problem (crank shaft run out) the more I believe this is the case.
    My dealer has been good to me, sales and service, pricey but fair. This may be a dumb question but Is this a common enough problem with the Twin Cam that the dealer is aware of and am I up for a fight on repair?

    thanks all,
     
  5. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Common enough that HD has issued a technical bulletin on it to their network.

    Is your engine the 96ci, or larger?

    You should take the bike in as soon as possible and start the paper trail process. Once the problem (runout) gets bad enough, problems and even complete failure of the oil pump can ensue. In a catastrophic failure, the oil pump can quit working and be damaged scattering parts in the engine.

    Get it checked out.

    TQ
     
  6. spike_flhtcu

    spike_flhtcu Member

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    Its a 96ci
     
  7. glider

    glider Veteran Member

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    Do as TQ suggests and get it into the dealer to check out the run out.It's the best and safest way.

    Myself, I would run it on the highway and let it grenade , then they will replace the whole engine vice just the crank as long as you don't get hurt trying this way.
     
  8. Bud White

    Bud White Well-Known Member Retired Moderators

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    Sounds like a Decent Theory to me .. My question is how come all 96's dont sound the same at start up did they make a change mid year my buddies early 08 knocks big time at start up mine doesn't
     
  9. glider

    glider Veteran Member

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    To add to this, I heard that the manufacturing processes were changed for the newer cranks which could mean about the same thing.
     
  10. Joe2007ultra

    Joe2007ultra Active Member

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    True considering the starter is only pulling on the left hand side it could verywell be causing and impact and problems.

    How many miles do you have on it?
     
    Last edited by a moderator: Dec 29, 2008