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dweymer's Avatar
 
Join Date: Nov 2004
Location: Tucson, AZ
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Stuck Cylinders/pistons

OK, I've got this alu engine from a 67, it is siezed. I am trying to save the crank, case, and rods. The pistons seem to have rusted to the cylinders, and I could only remove one. Any ideas on how to remove the others? I cannot rotate the crank at all. I have soaked the tops of the pistons (3 at a time) in PB blaster, pounded with a rubber mallet etc. I do not want to damage the case, but I am running out of ideas.
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Donnie

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Old 01-25-2005, 03:57 PM
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Henry Schmidt's Avatar
 
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We have encountered this several times before and the only thing we could do was split the cylinder. You can use a die grinder w/ a cut off wheel and a large chisel. Once the cylinder is split it will generally come right off.
Good luck.
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Last edited by Henry Schmidt; 01-27-2005 at 05:11 PM..
Old 01-25-2005, 04:30 PM
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That's what I figured I would have to do. Thanks Henry. I will talk to you soon about pistons/cylinders.
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Old 01-25-2005, 06:46 PM
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I had this happen once too. I used a 4 1/2 in. angle grinder to cut open the cylinder. I made a couple of cuts along the axis of the cylinder, one on the top and one on the bottom. I was then able to split the cylinder the rest of the way and remove it in two pieces. I'm sure a die grinder would work too, but it would likely take a lot longer than a small grinder.

Ouch. It's painful to use such drastic methods, but you risk hurting the parts you really want to preserve if you use too much force.
Old 01-27-2005, 03:19 PM
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yes this s*cks. I've got two off without cutting, since both kids are sick garage time has been far between.

Thanks for the help guys.
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Old 01-27-2005, 05:53 PM
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I used a large pipe; placed on top of piston, strike the top repeatedly with 5lb persuader. Soak pistons with penetrating oil first. Had an idea about recycling the iron cylinders.
Old 01-27-2005, 06:50 PM
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I do not want to risk damage to the rods, crank, or mains by that kind of force, but I thought about it.
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Old 01-27-2005, 07:15 PM
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