<VV> freeing stuck parts answer you dont want to hear

[Kenneth E Pepke]

As aluminum oxidizes it does become less dense ... meaning
any given volume becomes greater.  The longer it continues
the greater the change.  

I suppose it is worth 
trying all the previously suggested methods to loosen the 
seat post but the expansion of the aluminum is likely going to 
be greater than the amount of difference that heat / cold will 
change the parts.  In the end you are either going to have to live 
with it as is or saw off the seat post and drill it out :-(
Ken P

> -------------- Original message -------------- 
> In a  message dated 8/11/2008 9:01:35 A.M. Pacific Daylight Time,   
> dkdewald at pasty.net writes:
> 
> At  21:20 8/10/2008 -0400, Marc  Sheridan  wrote:
> 
> >>snip<<
> >My bicycle has an  aluminum seat  post in a steel seat tube. While 
> looking 
> for  a
> >creaking noise, I  discovered that I forgot to use anti-seize in  
> this
> >situation, because  the seat post won't  budge
> >
> >Has anyone found a way or a  chemical that will  break that bond? 
> I've been
> >shooting PB Blaster on  it everyday for  weeks and it still won't 
> move. Heat
> >is out of the  question  because it would ruin the paint and I can 
> still ride
> >it the  way  it is. I'd just like to get it freed in case I do want 
> to adjust it for some reason.
> 

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