[Shop-talk] Removing hardening-type Permatex No. 1

[Elton E. (Tony) Clark]

*In industrial engines and equipment, the same problem is frequent and the
good techs I've watched use a butane torch in one hand and a wire brush in
the other: cosmetics are not a priority for them. . practice on a ferrous
part 'til you develop a tender touch for the alloys.  Tony
*
On Sun, Aug 7, 2011 at 8:41 PM, Karl Vacek <kvacek at ameritech.net> wrote:

> I'm often faced with removing and replacing parts installed over 10 years
> ago with what appears to be old-fashioned, hardening-type Permatex No. 1.
> The gaskets are glued onto both parts with the Permatex, and thanks to many
> joints between steel and magnesium or aluminum, differential expansion has
> disturbed a majority of the joints enough to cause oil leaks.  No idea why
> the previous mechanic used this crap, but it's there now and I have to
> remove and re-gasket most every part where he used it because of oil leaks.
>
>
>
> Once the joints are apart, the real fun begins as I try to remove the
> remaining gasket and sealer without hurting the engine case (magnesium),
> and
> the mating parts, which are mostly steel or aluminum.
>
>
>
> I've tried pretty much every solvent I have - naphtha, mineral spirits,
> lacquer thinner, acetone, MEK, xylene, heavy-duty methylene chloride
> stripper, and even oven cleaner.  I've also applied enough heat that the
> gaskets begin to burn, but no effect on the Permatex.  Nothing seems to
> touch it.  Permatex says isopropyl alcohol works on cured material, but it
> doesn't as far as I can tell.  This stuff has been heat-cycled many times
> over at least 10 years, and it's pretty hard and the excess oozed out is
> fairly crumbly.
>
>
>
> Many of the joint surfaces are very hard to get to in order to scrape, and
> when it's on magnesium or aluminum, I don't want to scrape with anything
> too
> aggressive, so as not to mar the surface.  I wind up using sharpened oak
> scrapers, popsicle sticks, plastic putty knives, and lots of time and elbow
> grease.
>
>
>
> Anybody ever successfully and simply remove this stuff ?
>
>
>
> Thanks!
> Karl
>
>
>
>
>
> Pilots -
>
> Looking down on people since 1903
> _______________________________________________
>
> Shop-talk at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/eltonclark@gmail.com
>
>


-- 

*The problems we face today are there because the people who work
for a living are outnumbered by those who vote for a living.*