[Shop-talk] how to loosen stuck pistons?

[Bob Spidell]

I'm not sure any penetrant will solve the problem--since your rings may well be partially welded to the cylinders--but FWIW:

http://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Board=10&Number=215167&Searchpage=3&Main=30233&Words=kstuck+engine+kroil&topic=0&Search=true

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*http://tinyurl.com/66z7ff5*


Bob


On 4/17/2011 1:02 PM, BJNoSHOV8 wrote:
> I've got an engine that's frozen (stuck).  My theory is that they ran it without oil.  The bearings don't look bad but 
> the small ends of the rods look like they got hot.  I need to get the pistons knocked out.
>
> With the engine in the car I pulled the head off and soaked the tops of the pistons in PB Blaster, but it didn't seem 
> to help.   but then that is trying to rotate all 4 pistons at one time.  I pulled the engine out, pulled off the pan, 
> and tried to knock the pistons out one at a time.  I couldn't get them to move.
>
> I've finally decided that the PB Blaster might go beside the pistons but maybe it couldn't get by the rings.  So I can 
> try soaking the pistons from the bottom.  Someone told me to soak the cylinders in diesel.  I'm wondering if there is 
> anything that would be better, such as ATF (I've got some extra ATF).  I can set the engine upside down and fill the 
> bottom half of the cylinder and let it set for awhile.
> _______________________________________________
>
>


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Bob Spidell           San Jose, CA            bspidell at comcast.net

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