[SEL] Petter AV2-M Restore, progress report No. 3

[curt at rustyiron.com]

Arnie,
I missed this point about aluminum pistons in his post and photos on the
'net. Looking at the photos again the pistons still look "rusty". Given
the damage to the cylinder wall they will certainly have to be bored to
clean them up. I'd view the aluminum pistons as a blessing. Sacrifice
them. Heat 'em with a torch and melt them out of the way, letting the
cylinders come free of the block. Replacement oversize pistons ought to be
easy to find for a Petter. If not, easy to cast some new ones.
Curt



> Curt,
>
> Did Frank say that this engine had an aluminum block and/or aluminum
> piston?
> I wonder of the "firepit technique" might render his key parts blob-like?
>
> I think Leroy Clark had the same sort of success with fire that you
> describe.  I
> think he went a bit further and used a shop vac as a blower to speed the
> process
> along.  Same result though.  Cherry red engine that came apart nicely
> after it had
> cooled.
>