[Ducati] Engine sized

[Philippe Coulon]

4 more suggestions before going barbaric, none certified to solve your 
problem:

Load the engine in your trunk, and leave it there while you drive, the 
vibrations of the car could help, store it in any other vibrating place 
(air conditionning compressor, generator.....) beware the penetrating 
oil might be a security concern.


If you have acces to some industrial tools.
use an electric or pneumatic hammer  (foundry tool to compact sand) and 
repeatedly hit the piston.

Heat/Cold could do the trick. Rather than heating it's the temperature 
difference :  if you warm the cylinder more than the piston it should be 
freer to move.
try to cool the piston using liquid nitrogen (not that expensive, can be 
moved in thermos bottles) beware at such temperature steel or aluminium 
is brittle.

Last if the valves are open, and you want to try the grease pressure 
trick, remove the camshaft.

Philippe




> From: "rich lambrechts" <richinelli at neo.rr.com>
>
> Frank asked...
>
>
>   
>>> I have a 125 Bronco with a seized engine. I removed the head and filled
>>>       
> the barrel with penetrating oil, but it hasn't budged in three weeks. Any
> ideas? this machine was in my basement when I bought the house in 1980 and I
> have no idea what its history is.
> Thanks, Frank.
>
> Hi Frank...  you can keep soaking and trying and even add some heat to try
> to help...  if time and patience run out... the next steps involve more
> barbaric measures but will get the parts seperated...       first if you are
> lucky and the thing is stuck at or near bottom dead center...you may be able
> to raise the cylinder which will allow the crank to rotate...  (assumes the
> piston is stuck in the bore and not something in the lower end) and possibly
> the wrist pin would be exposed meaning you could push out the pin and then
> liberate the cylinder with piston stuck in...  then put the cylinder in a
> press with it properly supported and push it out.
>
> Second...you could ( if valves are in closed position) make a fitting to go
> in spark plug hole with grease fitting and try to hydraulic it out by
> pumping grease in with a grease gun..
>
> last resort...  start drilling holes through the top of the piston as near
> as you can to the cylinder wall ( wrist pin will be the stopping point)
> which may allow you to break the pinson into parts and get it undone that
> way...
>
> rich L
>