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Antique Gas Engine Discussion

Now what? 2 Cycle Piston removal


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  #1  
Old 08-20-2005, 05:28:29 PM
Greg Shipley Greg Shipley is offline
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Angry Now what? 2 Cycle Piston removal

Some remember the post I did recently about getting the piston out of my halfbreed. Well the grease and wax worked to get it moved about 4 inches, now it is past the intake port (this is a two cycle) and that pretty much ended the grease idea. I got the cylinder and piston off of the bed by unscrewing the rod from the crosshead. I got a 20 ton jack, and a chained it using a bunch of chains but cannot keep it square. there is no flat place on this pistion, I have a piece of aluminum to push against, but nothing is moving and the jack is too far out to use the head studs.
Any ideas?
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Old 08-20-2005, 09:15:21 PM
Tilinghast Tilinghast is offline
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Thumbs up Re: Now what?

Greg...can you get the cyl. pointing straight up and pour a lead slug on top of the piston to make it level to push against ??...Dave.
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Old 08-20-2005, 09:22:42 PM
Greg Shipley Greg Shipley is offline
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Default Re: Now what?

it might come to using lead, yes I can stand it straight up.
I think first I will try to put some extensions on the head studs and put a thicker plate behind the jack.
curious, how does everyone melt lead for this purpose? propane torch?
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Old 08-20-2005, 09:38:22 PM
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Chuck Martin Chuck Martin is offline
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Default Re: Now what?

Cut a wedge of hardwood, and put a metal plate on top of it.
Easy way to melt a lot of lead is to put it on the side burner of the grill. Use an old cast iron pot or old pan.
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Old 08-20-2005, 10:42:48 PM
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oldironcollector oldironcollector is offline
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Default Re: Now what? 2 Cycle Piston removal

As a side note melting lead can give off dangerous fumes so be carefull!!!!
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Old 08-21-2005, 08:48:11 AM
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John Davis John Davis is offline
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Default Re: Now what? 2 Cycle Piston removal

Quote:
Originally Posted by greg shipley
Some remember the post I did recently about getting the piston out of my halfbreed. Well the grease and wax worked to get it moved about 4 inches, now it is past the intake port (this is a two cycle) and that pretty much ended the grease idea. I got the cylinder and piston off of the bed by unscrewing the rod from the crosshead. I got a 20 ton jack, and a chained it using a bunch of chains but cannot keep it square. there is no flat place on this pistion, I have a piece of aluminum to push against, but nothing is moving and the jack is too far out to use the head studs.
Any ideas?

Greg,

Can you make steel plates to bolt & close off the intake & exhaust ports to finish pushing the piston out with grease & wax?

John
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Old 08-21-2005, 11:26:05 AM
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KeithW KeithW is offline
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Default Re: Now what? 2 Cycle Piston removal

Try making a wood plug longer than its diameter and a close fit in the cylinder. That will not rock. Then push with the jack.

keithw
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Old 08-21-2005, 08:17:56 PM
Greg Shipley Greg Shipley is offline
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Default Re: Now what? 2 Cycle Piston removal

Keith,
exactly what I am thinking of trying.
I found a 2" thick piece of metal (good thing I never throw anything away )to push against for the jack and will put the wood between the piston and metal.
also got some all thread that matches the head studs and will use couplers to extend the studs out and will use my support scheme I used for the grease, hopefully it will move.
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Old 08-21-2005, 09:34:53 PM
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Default Re: Now what? 2 Cycle Piston removal

I would think that the 2" thick metal drilled to match the head bolt holes would make a dandy press. Install the wood block, use all thread to hold the plate and start turning the nuts a turn at a time to keep them even. Should be able to generate some serious pressure.

keithw
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