Acid Dipping Engines

[rocco16 at sbcglobal.net (Larry Fry)]

If there are any aluminum parts in the block, they WILL be adversely 
affected by the strong alkaline solution. This includes, obviously, aluminum 
heads.
Purple Power, Formula 406, etc. (in fact ALL soaps) are alkaline, but not 
strong enough to hurt aluminum (unless the Al is kept in the solution for 
days).
In that respect you are quite right.
Larry




> Larry, two questions, first does the alkaline solution affect the
> intermediate shaft bearing or will it still have to be replaced when you
> 'tank' the block?  Second, is the alkaline tank also used on the
> aluminum heads too?  I have had success cleaning heads with Purple
> Power, which is probably a weak alkaline.
> Thanks, Rick.