Help removing cylinder

[moespeeds]

Push it back on, torque just the big nuts, and rotate the engine with lots of lube sprayed into the bore. Get it all loosened up and try again with the cyl at TDC.

Mine was also a pia to get off, turns out the rings were delaminated and packed with flaked moly. Made everything sticky.

I wouldn't go nuts rotating the engine with no torque on the through bolts.

[abuura]

Originally Posted by rmarshall234

With the valves closed and bottom plug in, apply shop pressure to other spark plug hole? Just spitballing here…

That’s a good thought. I’ll try it. With piston at bottom center (prop won’t turn) I’ll start with 20psi on the differential side and work my way up carefully.

[gasman]

Originally Posted by RheinRivets

If the air pressure gets high enough, the suddenly loosening cylinder might turn into a nice projectile. Might work but I would proceed with extreme caution.

If you were to go in this direction, it would work if the piston was at the bottom of the stroke and use hydraulic pressure = no projectile... full control.

I think the penetrating oil should work for you.

[abuura]

Originally Posted by gasman

If you were to go in this direction, it would work if the piston was at the bottom of the stroke and use hydraulic pressure = no projectile... full control.

I think the penetrating oil should work for you.

I’m hoping it does. Lycoming support says using the thick end of a wood shim to rock against would be acceptable too.

[gasman]

Originally Posted by abuura

That’s a good thought. I’ll try it. With piston at bottom center (prop won’t turn) I’ll start with 20psi on the differential side and work my way up carefully.

Be careful here... 20 psi will apply over 400 pounds force.

If you are going to use air, start at O and work your way up to 5 psi.

If that doesn't work, then go hydraulic.

[abuura]

Originally Posted by gasman

Be careful here... 20 psi will apply over 400 pounds force.

If you are going to use air, start at O and work your way up to 5 psi.

If that doesn't work, then go hydraulic.

Sage advice. Wilco.

[Taltruda]

Go and climb into the cockpit and yell “clear prop” and start the engine.. it’ll come off..it might sound like Dreadnaught for a few seconds..

[PilotjohnS]

if you are going to try air pressure, I would fill the cylinder with fluid, like alcohol or something, to minimize the volume of air, and the resulting pop.

But remember, you are going to be applying force to something that is hanging up, like coked deposits or something, so that force is going to be exerted on something that hopefully, will be able to take it.

[climberrn]

Heard a funny story recently. Difficult, rusted cylinders on a radial. They would fill the cylinder with Oxygen/Acetylene and light it. Would get it right off, and occasionally hit the ceiling.

Please don't try this. Just thought you would get a laugh out of it.

[wcalvert]

Huh Huh ... Fire Fire Fire