Carbon seatpost stuck in steel frame

Anyone had success removing a stuck carbon seatpost from a steel frame. I've searched LFGSS and Google but there's little on carbon posts in steel frames. I'd hate to damage either as it's a 853 frame and record seatpost...

Cheers

you might have to saw it out :(

It cant be siezed in the chemical sense. So it might be worth trying to get some WD40 or similar onto it and let it soak.

WD40 will not damage the epoxy holding the carbon fibers together.

I pretty sure epoxy has a low coefficient of thermal expansion too. So if you can heat the seat tube a little, it might help some.

Other than that I dont know of any tried and tested methods. :(

ouch :(

If you've tried getting lube in from the top, you could also try tipping some lubricant - "plus gas" would be my choice - in from the bottom bracket, with the bike upside down; leave 24 hours. Otherwise, as above, gentle gentle heating.

After that I guess you're putting it a vice and twisting...

good luck!

In absence of wd-40 or plus gas diesel fuel or parafin can also do.

I've been lubing it everyday. Managed to get about 5mm of movement (rotation) but had to use a lot of power. I'll try diesel, then heating if that doesn't work. Vice then saw as a last resort. Cheers.

http://www.themarriedgamers.net/wp/wp-content/uploads/2010/08/mlss_mario-hammer.jpg

Thanks Sumo... it may com to that. I may have to destroy one to save the other. But which to chose???

carbon breaks easier, so that bit.

carbon breaks easier, so that bit.

:(((((

try not to saw it as it is very easy to damage the frame. not surely but sometimes may help to have big a gallon or more of very hot water and pour it slowly over the seat tube are. that will gently heat up the steel and may help rotate the seatpost out of it. bench wise may be good aproach as long as caution is taken not to bend or break the frame.

We get alot stuck in mainly due to manufacturers saying not to grease some of them, we grease them all.

Usually they stick like shit to a blanket which is odd, you would think that they would come out with brute force as they are totally diferent materials.

I get one odd one out undamaged with heat but usually they get a little bit of damage

thermal might be your best bet. Used it to unseize SO SO SO many things.

strip the frame and bung it in th freezer. Do NOT wet it. might need a chest freezer not one of those crappy little ktichen things.
get 1 or 2 kettles worth of water boiling. Clamp up your frame in a workstand by the seattube (DO NOT TOUCH THE SEATTUBE) pour the water around the top tube, seat stays and dribble a bit down the seat tube but not as far up as the clamp. You might find pouring at a steady slow rate the best. Once you've emptied the first kettle (2litres?) with your gloves on give the frame a good old tweak while standing on the stand to prevent it moving (unless you have a proper shop job wiht a slab of steel on the ground). 95% chance you'll get it out

Obviously carbon isn't going to expand and contract like metal would, but i've used it sucessfully on all but ONE aluminium post and got a carbon one out (easton ea70 mtb post inside 90's kona l;dome). I'm pretty sure you'll see some sort of movement in a positive direction ;)

Won't going from freezer temperature to boiling water just cause it to crack?

if its not a special seatpost. lighter.

if its not a special seatpost. lighter.

Campy Record :|

carbon breaks easier, so that bit.

Carbon is harder, much much harder, to break that Steel/Alu.

Campy Record :|

If it's stuck, it is mechanically (physically) stuck as carbon won't chemically bond to steel - you will need to wrestle it out physically.

Did you lube it when it was a functioning post ?