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[Shop-talk] how to loosen stuck pistons?

Subject: [Shop-talk] how to loosen stuck pistons?
From: bjshov8 at tx.rr.com (BJNoSHOV8)
Date: Sun, 17 Apr 2011 19:05:20 -0500
References: <006801cbfc49$d8e17ee0$8aa47ca0$@cablespeed.com> <6.2.5.6.1.20110416120300.04e0bb20@cox.net> <008401cbfc56$4dcc9030$e965b090$@cablespeed.com> <6.2.5.6.1.20110416155842.04c579f0@cox.net> <00a501cbfc99$21bb7400$65325c00$@cablespeed.com> <6.2.5.6.1.20110417093246.04b760c8@cox.net> <4DAB475E.5030106@tx.rr.com> <6.2.5.6.1.20110417184838.04c504f8@cox.net>
When I get time to mess with it again I may try the ATF/Acetone, that 
would be pretty easy to do.

When the engine was in the car I tried rotating the engine  I ended up 
putting it in high gear and putting a large pipe wrench on the 
driveshaft.  I put nearly 200ft-pounds on it and nothing moved.  This 
little engine won't develop nearly that much torque when running at full 
throttle.

I pulled the head off to investigate.  I PB'd the cylinders numerous 
times, let it set, and tried hitting the tops of the pistons with a 
block of wood and a small sledge hammer.  I pulled the engine out, 
pulled the pan, pulled a rod cap off and tried to knock that piston 
out.  I was being a little easy on it this time not wanting to damage 
the pistons from the bottom, but couldn't get any movement.  I'm not 
sure the pistons can be reused anyway.

> Good luck, just take your time.  If you do try tapping the pistons do 
> it gently.  Don't come down real hard
> with the hammer like you're trying to drive a nail home in 1 hit..

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