wrote in message
...
On Mon, 26 Apr 2010 16:45:27 -0700, "Steve B"
wrote:

I got a used Motor Guide Brute.. Where the SS (?) chromed shaft goes
through the aluminum clamp, it is firmly in there. I cannot get it to
twist. (Yes, yeah, I did loosen the nuts.) I put some sewing machine oil
on there and left it to flow vertically. Is PB Blaster better? Should I
put a pipe wrench on it? Waiting for it to move on its own rather than
brutalizing it. IT doesn't appear, even with dissimilar metals that there
is any galling, and this is a freshwater application.

Steve


Stainless and aluminum are not really compatible. They tend to form a
white corrosion in the aluminum. There is a teflon product that helps
but you need to keep it in there.

Heat and a penetrating solvent ... not at the same time.
Be aware of the flash point of what you are using. You don't need a
lot of heat, just enough to draw in the solvent as it cools.
PB Blaster is OK but so is good old WD40 on aluminum.

There is also a product called "Cold Shock"
http://www.newequipment.com/303/Prod...old_Shock.aspx
the idea is that the metals will shrink at different rates.