<VV> Fwd: VV> Metal question, not necessarily Corvair

[ScottyGrover at aol.com]

In a message dated 8/11/2008 9:52:10 A.M. Pacific Daylight Time, Scotty  
Grover writes:

 
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.

You may want to try cold.   Since aluminum has a greater thermal expansion 
coefficient it will  shrink more than the steel tube when chilled.

Maybe you could try a  can of circuit cooler from an electronics supply 
house, but this might  not get it cold enough. However, the ideal chill 
could be made with  liquid nitrogen.  Maybe you could get the left over LN2 
from your  doctor's office at the end of the day when they have it available 
to  freeze warts.

If you get some, make a dish or cup like mold out of  styrofoam to contain 
the LN2 around the seat post.  LN2 will boil  and spatter on contact with 
anything warm. Wear heavy gloves and eye  protection [goggles].  LN2 on the 
skin causes almost instant  frostbite burns--painful, but will heal. LN2 in 
the eyes will cause  permanent damage.

If you end up trying this, please let us know how  it works out.

Dale Dewald
Hancock,  MI




Dry ice in acetone (fingernail polish remover) might be easier to  find; the 
same safety precautions should apply.
 
Scotty from Hollyweird








**************Looking for a car that's sporty, fun and fits in your budget? 
Read reviews on AOL Autos.      
(http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017 )