Hi All

I have an ally seat post stuck in a steel frame 

I have tried heat but I don't want to blister the pain on the frame

I have tried WD40 in through the bottle cage holes with the bike upside down all weekend but it is still stuck

Any ideas

 

mamos 

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carpe scrotum

If you didn't build it, you don't own it.

do it again, this time using brake fluid. apply with a dropper so as not to damage the paint.

 

try tapping it in a little bit before pulling it out. looks like its a bad case of binding.

 

at the moment, i to have a frame with a stuck seat post thAT ARRIVED TODAY,  

 

Take off the saddle if you haven't already. Turn bike upside down and clamp the seatpost in a decent vice. Rotate bike.

 

 
 

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She who succeeds in gaining the mastery of the bicycle will gain the mastery of life.
– Frances E. Willard, How I Learned To Ride The Bicycle, 1895


The follower of singlespeeding
is at one with his bike.

Cheers Guys

I will have a go and let you know how I get on

 

mamos 

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carpe scrotum

If you didn't build it, you don't own it.

I agree with adamx.  That will work most of the time, but you may have to wreck the seat post.  Better than wrecking the frame though.  Also wd40 sucks for this application.  go get a decent penatrant fluid at the hardware store.  pay the big bucks for it and it will work.  sometimes you may have to soak it for a good week or so, if it's really bad.

for wd 40 substitute coke non diet works best

take b/b out and pour it down the seat tube

you obviously don't watch Myth Busters, mikee.

Here's what we do with very light frames - it seems to work OK with any frame and post material - including carbon.

Wrap the affected area of the frame (upper seat tube) tightly with cloth (such as an old towel), and leave for an hour in the coldest environment possible. Then soak with three or four continuous kettle loads of boiling water. This usually causes the seat tube to swell by a sufficient amount to break the bond. The post should twist out using only the saddle as a lever.

In our experience the 'saddle off, clamp and twist' method can damage (and unfortunately has ruined several) lightweight frames. This method should only be used once the bond has been broken, and the seatpost has begun to move. Sawing a post out is also a very difficult method, as it's difficult to avoid cutting into the frame.

If an alloy seatpost has electrolytically corroded into a steel frame there could be a considerable bond, due to the aluminium oxide effectively swelling the post. In such cases there is only one option available without using a flame. That is to dissolve out the post using frequent changes of caustic soda solution poured into the inverted frame through the BB. Caustic soda is highly dangerous, and will cause very serious burns if it gets on your skin. You can get it from any hardware store, but do be careful - and follow the safety instructions to the letter. The solution agressively dissolves aluminium, whilst leaving steel unharmed. Test the solution with an aluminium drinks can, and be amazed as it 'boils away' to nothing in a matter of seconds! The alloy post should be sawn off so that only about four inches (10cm) protrude from the frame, and then tightly plugged with a cork. It should also be internally de-greased as much as possible before introducing the solution into the seat tube. BE VERY CAREFUL!

Oh, there is one more method. Travel back in time, and grease the post/frame interface properly - with regular removal and re-greasing during monthly maintenance sessions.

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"Gears are like eyes or testicles. Having more than one is an unnecessary luxury." Elvis A. Presley

Hardly Core:

you obviously don't watch Myth Busters, mikee.

aint seen that one  core ,but taken seat posts and other bits using the coke method over the past 30 yrs

just because some idiots on the tv tell you it wont work don't mean it's true  

"Travel back in time, and grease the post/frame interface properly - with regular removal and re-greasing during monthly maintenance sessions."

 

That's the one that works - you just have to get your singlespeed up to 88mph (cf: back to the future)

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She who succeeds in gaining the mastery of the bicycle will gain the mastery of life.
– Frances E. Willard, How I Learned To Ride The Bicycle, 1895


The follower of singlespeeding
is at one with his bike.