[Fot] Freeing stuck pistons

[Bob Bownes -Seiri]

Last time I had to do this, like Bill, I used a BFH. The pistons came out in
chunks.



On Jun 29, 2011, at 19:10, Bill Babcock <billb at bnj.com> wrote:

> BBFH. BB stands for Big, Big and H stands for Hammer.
> On Jun 27, 2011, at 4:59 PM, Ken Suhre wrote:
>
>> Tim, If you are not saving the pistons and have the crankshaft out of the
>> block, why not set the block in a hydrolic press? Then place a suitable
> size
>> thick piece of steel on top of the piston and press them out. I have a
> feeling
>> they will move rather easily since you have been soaking them with
> penatrant.
>>
>> Ken Suhre
>>
>> Tim wrote: Has anyone tried
>>> 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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