Stuck carbon seatpost?

JonEdwards
JonEdwards Posts: 452
edited September 2008 in Workshop
The Easton EC70 post on my roadbike has got stuck in the (ally) frame. Wouldn't be a problem if the frame hadn't got full of water at the weekend (and no it doesn't drain out the BB - I've tried that).

I've tried using a 12" adjustable spanner on the head to apply extra torque, WD 40, gentle heat from a hot air gun (don't want to trash the paint).

Any ideas? I'm pretty sure its the bare ally inside the seat tube that's corroded. I didn't grease the post (because you don't with carbon) and its been in there since before the fancy carbon assembly paste was readily available.

I'd like to keep the post intact if possible, as I don't really want to have to buy a new one!

Thank y'all!

:-)

Comments

  • nicklouse
    nicklouse Posts: 50,673
    sorry sounds like time to start cutting.

    http://www.bikeradar.com/forum/viewtopic.php?t=12575737

    http://www.bikeradar.com/forum/viewtopic.php?t=12567470

    and depending on who you talk to greasing carbon is fine.

    http://www.bikeradar.com/forum/viewtopic.php?t=12534958

    Been using it inside car engines for years and the hot oil has not done anything.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • dennisn
    dennisn Posts: 10,601
    If it's worst case and won't come out it's time to saw. Cut the post off a couple of inches
    above the seat tube clamp. Now, carefully, with a hacksaw blade start cutting vertically through the seat post wall, the full length of what's left of your expensive post. Try not to cut into the bike seat post itself. Once through it MAY break out for you. If not cut through
    the post again in another spot. It SHOULD eventually come out. This is radical surgery
    to say the least. Good luck.

    Dennis Noward
  • Nuggs
    Nuggs Posts: 1,804
    I know you'll laugh, but try pouring some Coke on it.

    I have a mate who was an engineer for BA. Whenever they were faced with a stuck part, he would pour some Coke on it, leave it for a few minutes and give it a try.

    I've used that technique to free many things up on my cars, so deffo worth a go...
  • Gav2000
    Gav2000 Posts: 408
    Nuggs wrote:
    I know you'll laugh, but try pouring some Coke on it.

    I have a mate who was an engineer for BA. Whenever they were faced with a stuck part, he would pour some Coke on it, leave it for a few minutes and give it a try.

    I've used that technique to free many things up on my cars, so deffo worth a go...

    I was scrolling down to suggest the same thing. Coke seems to have lots of uses for many things except as a healthy drink.

    Gavin.
    Gav2000

    Like a streak of lightnin' flashin' cross the sky,
    Like the swiftest arrow whizzin' from a bow,
    Like a mighty cannonball he seems to fly.
    You'll hear about him ever'where you go.
  • Beardy10
    Beardy10 Posts: 115
    Big bottle of Coke is great for clearing blocked toilets :D Leaves it very shiny too. Not sure that it's safe to drink though...
  • nicklouse
    nicklouse Posts: 50,673
    Gav2000 wrote:
    Nuggs wrote:
    I know you'll laugh, but try pouring some Coke on it.

    I have a mate who was an engineer for BA. Whenever they were faced with a stuck part, he would pour some Coke on it, leave it for a few minutes and give it a try.

    I've used that technique to free many things up on my cars, so deffo worth a go...

    I was scrolling down to suggest the same thing. Coke seems to have lots of uses for many things except as a healthy drink.

    Gavin.

    great for fixing a slipping clutch just before a sale. :wink:
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • stjohnswell
    stjohnswell Posts: 482
    1. put the coke and hacksaw away.
    2. turn bike upside down and remove bottle cage bolts from seat tube.
    3. spray loads of wd40 into holes and leave upside down overnight to soak.
    4. flip bike right way up and remove collar or pinch bolt.
    5. warm top of seat tube with hairdryer - nice and warm - not hot.
    6. twist post by the seat like your life depends on it.
    7. drink coke to celebrate.

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