pietfiets Posted April 27, 2021 Posted April 27, 2021 I have two seized seatpost problems,, The one Alu post in a Carbon frame, and Alu in Steel frame ?
King_Crispy Posted April 27, 2021 Posted April 27, 2021 WD40.Lots of it.And a rubber mallet. Easy peasy
Barry Posted April 27, 2021 Posted April 27, 2021 I have had success with a pinarello using lots of Q20 then boiling water. But have also been told that it could crack the carbon so maybe a last resort.
RobertWhitehead Posted April 28, 2021 Posted April 28, 2021 I have successfully removed a seat post from a carbon frame with a grinder and hand saw. It took about a week part time but no liquid in any form worked. The post was seized for more than 4 years
Mojoman Posted April 28, 2021 Posted April 28, 2021 I have successfully removed a seat post from a carbon frame with a grinder and hand saw. It took about a week part time but no liquid in any form worked. The post was seized for more than 4 yearsLol..I was actually just about to post a pic of a grinder as a joke but you did it!
AdamA Posted April 28, 2021 Posted April 28, 2021 I have successfully removed a seat post from a carbon frame with a grinder and hand saw. It took about a week part time but no liquid in any form worked. The post was seized for more than 4 yearsA mate of mine did it this way. Cut the seat post off and then very carefully cut a line down the seat post to compress it and then remove it. Be patient and good luck. please post pics of the progress
Wayne pudding Mol Posted April 28, 2021 Posted April 28, 2021 I used a product from Wurth call Rostoff I think Sprayed tons of it and then a day or 2 later put the bike on a vice seatpost first and then used the bike as leverage It worked once and failed once
Martin PJ Posted April 28, 2021 Posted April 28, 2021 I removed steel post stuck into steel frame by soaking Q5 oil overnight into the post - frame area. Then gripping post with adjustable pipe wrench, turning it. Damaged the seat post a bit, frame was fine.
EddieV Posted April 28, 2021 Posted April 28, 2021 saw this a while ago on Hambini - not sure whether it is applicable. He used de-scaler and left it overnight.
erikt123 Posted April 28, 2021 Posted April 28, 2021 use a extinguisher with co2 around the frame where seatpost is stuck , it freezes the area and seatpost comes out quite quickly
RobertWhitehead Posted April 28, 2021 Posted April 28, 2021 The reason why I did not go for a cooling down option (I looked at using dry ice) on carbon is because I am not sure what the extreme cooling will do to the structural integrity of the carbon. I mean it is two completely different materials that expand and contract at different rates. But this is just my opinion though . use a extinguisher with co2 around the frame where seatpost is stuck , it freezes the area and seatpost comes out quite quickly
TNT1 Posted April 28, 2021 Posted April 28, 2021 sterkte... galvanic corrosion With carbon and aluminium as the two things? Surely it can only ever happen between two metals? Is this bloke's "carbon" frame one of those ones we see in the classifieds here with the welds on them? How would an alloy seatpost get stuck in a carbon frame anyway?
The Ouzo Posted April 28, 2021 Posted April 28, 2021 With carbon and aluminium as the two things? Surely it can only ever happen between two metals? Is this bloke's "carbon" frame one of those ones we see in the classifieds here with the welds on them? How would an alloy seatpost get stuck in a carbon frame anyway?I dont know anything about this, but from watching Mike Patey on youtube building a bush plane out of carbon fibre, he mentioned the corrosion a few times where he used Aluminium and as such he put and insulating layer between the carbon and aluminium so they are never in direct contact.
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