Does someone want ot remove my stuck seatpost? UPDATE v2!!!

[coomber]

Any progress on this Matt?

Dendy had a good idea for his stuck on his kili. If the seatpost has the clamp attached take the steel rails from a knackered seat and weld a piece of steel metal to it for a ridiculous amount of leverage. Should work a treat especially with penetrating oil first.

I've nicked his picture to show what I mean, hope he doesnt mind:

 

[JamesM]

The trouble with using big levers is you can shear the post and leave some of it way down in the seat tube.

Caustic soda worked a treat for me. I had a stuck post that was all the way down. Nothing I tried would touch it, hot, cold, penetrating oil, bench vice etc. In the end I left it upside down in my garden with caustic soda in the seat tube. Poured it out and put new in every few days. After a couple of weeks I put it back in the vice and it came out with next to no effort. There was virtually no post left and the frame was completely unharmed.

For aluminium frames try amonia. It eats the aluminium oxide but not the aluminium itself.

 

[mattbrown]

I havent tried any new method yet, still assessing my options.

 

[Rich Aitch]

You could try a Carbon Dioxide life-jacket or tyre inflator, as they're cheaper than a whole extinguisher, although not as much fun CO2 extinguishers make a cool howling noise!

Probably best to just stick with a CO2 tyre inflator, I don't think you'd be able to use a lifejacket cartridge without having a firing pin to go with it and I think a lot of them are single use. Suddenly looking like an expensive idea...

 

[Radar]

The 'give it a big hit with a big hammer' option is pretty logical. When trying to undo stuck screws it usually works to try and tighten it slightly before undoing it (in order to break rust seals without cream crackering the screw head).

1. lube
2. more lube
3. even more lube
4. hit it with a big hammer to break any rust seals
5. pull it out


Simples (probably not actually)

 

[JamesM]

http://www.boots.com/en/Boots-Caustic-S ... oda%20500g

Cheap, no force required, its the best way. You won't use the whole bottle so you can unblock some drains too. I used a mince pie silver foil thing to pour the soda pelets down the seat tube through the hole in the BB shell. One mince pie silver things worth and then fill the whole seat tube with water. It's not Xmas anymore though so you will have to think of something else Just pour the water in and leave it for a few days. Repeat every few days for a few weeks and then give it a bit of a nudge with a pair of grips or something and it will be sorted.

Seriously though I'm not sure what it does to paint. It didn't seem to damage mine but it was pretty bad anyway and I was having it powder coated so didnt really look at it properly.

 

[wired99]

I got mine out of my Canyon by soaking in pentrating oil for about a week with frame upside down. I would give it a little bang with rubber mallett every few hours or so. I then secured a long steel bar to the seatpost with the seatpost clamp, turned frame upside down and steood on either end of the bar whilst gently rotating the frame from side to side. After about five minutes....shuloooooooooooooooooooomp! She was out!!

 

[thesneaker]

i've had no luck with my Attitude frameset, tried plusgas, dtilled a hole on the seatpost and got a slide hammer on it, now goin to drill it out

 

[JamesM]

Did you try amonia? It disolves the aluminium oxide but not the aluminium itself.

 

[thesneaker]

not yet, the paintwork has oxidised really badly on the outside of the upper seattube so i reckon inside its well stuck, might try the amonia then b4 drillling out, no cared about ruining the paintwork, any tips on this technique would be appreciated