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Technical & Reference Section => Tech and Restoration => Topic started by: elmo on May 18, 2006, 08:26 PM

Title: seat post stuck HELP!!
Post by: elmo on May 18, 2006, 08:26 PM

i have got an alloy renthal seat post stuck in my dp firebird its been sat in oil for a week but wont budge.
can i heat it or will it damage the frame? any more ideas thanks

Title: Re: seat post stuck HELP!!
Post by: lazychubs on May 18, 2006, 08:29 PM

diesel or the stuff that eats alloy
they use to strip anno of alloy
caustic soda

Title: Re: seat post stuck HELP!!
Post by: lazychubs on May 18, 2006, 08:30 PM

second bit if ya dont want the seat post lol

Title: Re: seat post stuck HELP!!
Post by: elmo on May 18, 2006, 08:33 PM

sounds like a good plan mate thanks  :D

Title: Re: seat post stuck HELP!!
Post by: adeshere on May 18, 2006, 08:50 PM

have you not tried putting the post in a vice and turning the frame ?

Title: Re: seat post stuck HELP!!
Post by: theRuler on May 18, 2006, 08:56 PM

Quote from: adeshere on May 18, 2006, 08:50 PM

have you not tried putting the post in a vice and turning the frame ?

that should work

Title: Re: seat post stuck HELP!!
Post by: elmo on May 18, 2006, 09:03 PM

alloy is too soft to put in vice it just turned .drilled a hole through the alloy and put metal pin in then clamped to the vice which held it in place got more flex out of the frame but post did not move.it is really stuck :'(

Title: Re: seat post stuck HELP!!
Post by: lazychubs on May 18, 2006, 09:12 PM

fill it up with caustic soda
watch ya eyes and dont breath it in
it will be all gone in the morn lol
just pour out the mess after

Title: Re: seat post stuck HELP!!
Post by: elmo on May 18, 2006, 10:14 PM

will try the caustic soda over the weekend friend has got the right place to use the stuff so fingers crossed will work ok let you all know sunday

Title: Re: seat post stuck HELP!!
Post by: steve on May 18, 2006, 10:16 PM

take your old stem, and clamp it to the seat post
-do it up real tight
-then, instead of trying to twist, whack it straight down

Title: Re: seat post stuck HELP!!
Post by: oberonspacefruit on May 19, 2006, 11:02 AM

sometimes caustic is the only way....

Title: Re: seat post stuck HELP!!
Post by: oberonspacefruit on May 19, 2006, 11:12 AM

(http://www.radbmx.co.uk/archive/albums/v260/oberonspacefruit/Picture033.jpg)


make sure you block any holes.
(http://www.radbmx.co.uk/archive/albums/v260/oberonspacefruit/Picture034.jpg)

(http://www.radbmx.co.uk/archive/albums/v260/oberonspacefruit/Picture039.jpg)



its worked quite well taken half of the post away, but it was a very thick post, so i need to do it again, but i ran out of caustic. i kept topping it up cos you pour a bit in then it all froths up over the top. you need to keep adding a bit more, and occasionally tipping out the sludge.

remember, gloves and dont breathe in the fumes....do it outside, and dont get it on your skin it burns like feck.

Title: Re: seat post stuck HELP!!
Post by: theRuler on May 19, 2006, 11:58 AM

i'll try that on my pk ripper ;)

Title: Re: seat post stuck HELP!!
Post by: elmo on May 19, 2006, 05:08 PM

Hi  oberonspacefruit how long did that take you to do ?
should i do the topping up bit or leave it overnight?

Title: Re: seat post stuck HELP!!
Post by: oberonspacefruit on May 19, 2006, 06:45 PM

i couldnt leave it overnight, cos the stuff literally flies out the top.

there is very little liquid left in the tube, due to spillage, thats why i had to keep topping it up.

Title: Re: seat post stuck HELP!!
Post by: Waxintaxin on May 19, 2006, 07:37 PM

Nice clear instructions , but wear goggles as this will hurt in your eye

Title: Re: seat post stuck HELP!!
Post by: lazychubs on May 19, 2006, 07:38 PM

you only got one eye then rich
 ???

Title: Re: seat post stuck HELP!!
Post by: Waxintaxin on May 19, 2006, 08:12 PM

1 eye would be an accident
both would be foolish

Rich :)

Title: Re: seat post stuck HELP!!
Post by: elmo on May 22, 2006, 10:58 PM

well used all the costic going to have to get some more.
the renthal seat post was really thick but it is thinning out now
cheers for all the advice

Title: Re: seat post stuck HELP!!
Post by: oberonspacefruit on May 23, 2006, 08:11 AM

slowly slowly catchy monkey.