In a message dated 2/13/00 9:20:21 PM Pacific Standard Time, CLLLSLS@aol.com
writes:
>
> Hey everyone,
>
> Finally found a 270 GMC. It's in excellent shape for being outside with no
> head for 20+ years. Got the crank out with thousands of blows with a big
> dead
> blow and a quart of aerokroil (Damn good stuff!), but the pistons are
rusted
>
> in the bores so tight they might as well be considered cast in there. I
need
>
> to reuse the rods, so destructive piston removal methods can't be too
> destructive. I've heard of putting the head on the engine then filling the
> chamber with acetylene/oxygen, replacing the spark plug and igniting with
> BBQ
> ignitor. Or freezing the pistons and breaking them apart. What's worked
for
> you guys? I really don't feel like missing with a 12 pound sledge and
taking
>
> off a corner of the block. There's gotta be a better way. Please help.
>
> Dustin
> 50 & 53 GMC 1/2 tons
I've let white vinegar sit in an old flathead motor before, kept topping it
off every day for a three weeks. Kept giving the pistons a few taps each
day, finally broke loose.
Beware though, once I got the pistons out I couldn't afford at that time
for the oversize bore and new pistons, the rust ate quit a bit into the
cylinders.
Mike
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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