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HELP!!! seized seatpost...advise please(8 posts)

HELP!!! seized seatpost...advise pleaseDjudd
Oct 11, 2001 2:40 PM
I just bought a used bike frame for a new fixie.. huge problem ... a seized seatpost. Right now I am soaking it in "Liquid Wrench" and gently tapping the post with a rag covered hammer. If this does not work in a few days I was going to get a plumber's wrench and use that leverage. Questions: I am really worried about doing any damage to the frame(steel) and the lug especially with the torque involved with a plumber's wrench. Does anyone out there have a better way to do this? Any suggestions would be greatly appreciated.

Sheldon Brown...MrCelloBoy
Oct 11, 2001 2:58 PM
has a list of suggestions on his website in this regard, going from what you're doing up to peeling the aluminum seatpost out of the frame with pliers.
I've currently got the same problem on my ibis Roadbike. I took the seat binder bolt off hundreds of miles ago and there's no worry about the seat slipping!
I may peel it out eventually.
Turn the bike upside down.......BikinCO
Oct 11, 2001 4:48 PM
put the seatpost in a vice and twist the frame.
DON'T DO THIS.javagenki
Oct 11, 2001 8:51 PM
Had a buddy who reckoned that aluminum and ti expand at different rates, so he heated the post with a blow torch. Not good. Really, really, really not good.
right. COOL it!jacques
Oct 12, 2001 9:44 AM
Aluminum expands at twice the rate than steel. Heating the post made will make it expand against the seat tube. It might even crack the frame.

Try cooling it with CO2.
seatpost sawTom C
Oct 12, 2001 7:08 AM
Loose screws, Third hand should have this tool. Essentially a specialized hacksaw used as a last ditch effort for frozen posts. You wind up taking the post out in pieces.
If all else fails.9WorCP
Oct 12, 2001 10:26 AM
It can be cut out w/ a hack saw blade. Painstaking w/ high chance of ruining the frame if not done perfectly. Check out Leonard Zinn's Mountain bike repair book. Might be in the road manual as well.
re: HELP!!! seized seatpost...advise pleaseFrank
Oct 13, 2001 4:24 AM
I have seen some postings in the classic bike and bike tech sites praising something called Kroil. It is a penetrating oil they say loosens stuff that has been rusted or stuck together for decades.