[Fot] Freeing stuck pistons

[Duncan Charlton]

Or pour in some muriatic acid and watch the aluminum dissolve (don't inhale).
Duncan

On Jun 27, 2011, at 11:56 AM, MadMarx wrote:

> I send you some photos of my work:
>
> Bore holes into the piston and sew the skirts through:
>
https://lh3.googleusercontent.com/_T17qmiZWUoA/TWy27lT0BjI/AAAAAAAAAyQ/M9s2l
> K9DRwk/s640/DSC01431.JPG
>
> Bore a large hole into the piston deck and use a hammer to drive it out:
>
>
https://lh4.googleusercontent.com/_T17qmiZWUoA/TW4WBuLjYuI/AAAAAAAAAys/F1yHO
> Z5jOyM/s800/DSC01436.JPG
>
> Good luck
> Chris
>
> -----Urspr|ngliche Nachricht-----
> Von: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Im
> Auftrag von Tim Pettenati
> Gesendet: Montag, 27. Juni 2011 17:17
> An: fot at autox.team.net
> Betreff: [Fot] Freeing stuck pistons
>
> Anyone have a tried and true method to free stuck pistons out of an
> old motor.
> I picked up a spare 1147 Spit motor that has been sitting with
> the head off for
> at least 15 years.
>
> Pistons 2 & 3 were at BDC and came out
> pretty easily after soaking in Kroil and
> PB Blaster for several days, then
> tapping out with a piece of wood and hammer.
> Pistons 1 & 4 are at TDC and
> pretty well frozen in place.  Penetrants doesn't
> seem to weep past the
> rings.  I've tried heating the pistons a few times with a
> propane torch.
> That hasn't helped much either.
>
> I have the motor on a stand and alternate
> soaking it from the top or bottom
> every free days. I understand much patience
> is required.  Eventually I may have
> to use brute force and bust the out. Not
> a big deal since the block will need to
> bored out.  But at this point I'm
> still hopeful that they can be removed intact.
>
>
> Thanks,
> Tim
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