Seized 1275cc, What the...?

[Don_Racine]

Also just had to take apart a couple motors to find parts for a rebuild and had a similar looking block. Our only solution was to break the pistons with a very large hammer. Cast irons rings will really rust to a cast iron bore!

 

[Hap Waldrop]

I had to mess with sieze motors more time than I like to remember, needless to say none of the remendies worked for me, I end up knocking the rods and piston out, what happens is the ring rust weld themselves to the bores.

You put the hydraulic to it and it will budge. A grease gun puts out 5000-7000 psi if working right. Figure that across the square inches of the piston and its a lot. Pick a piston that is half way down for full effect. Pull the rockers so the valves are shut. Once it breaks loose and your turn the crank with a wrench and pull that fitting out, the grease will squirt out like play dough. Grease is too thick to leak by. Something will have to give. I would stand to the side while doing this :wink:

Kim, when you are nomrally doing this type of job, it's on a engine core that will be rebuilt, and boring the cylinders will be a given, because as much as the rings get stuck to the bores, the rings will forever weled to the piston's ring land, so they will be garbage for sure, and almost always the bores will need to be over bored. So I normally spray the bores down a few days in advance and then use a piece of aluminum dowel I have, and a sledge hammer, I remover the crank first, and then wack the the rods and pistons out of the bore, never damaged a rod doing it. Looking at this guys's engine, he doesn't need to entertain the idea of saving pistons, they are scrap metal Don't get me wrong, I like your idea of using the grease gun if finese was needed, but 99% of tthe time in this case it just getting garbage parts out, so new parts and machine work can be used and done.

 

[theleisure]

Well, he's got this one freed up now. FWIW, the last time I had to get a crank bolt pulley off, impact wrench wouldn't do it (not the best electric one, I'm sure a decent air one would have no problem). I jammed a big flat screw driver in the flywheel teeth and put a 5' length of pipe on the handle of a hefty socket wrench, it finally gave up and came off. It's all about torque baby, leverage.

Thanks!