Re: stuck engines
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Posted by Ken McWilliams on July 31, 1998 at 09:39:30:
In Reply to: stuck engines posted by ray on July 30, 1998 at 06:43:25:
The problem you will have in addition to the obvious rust is galvanic corrosion. You can see it on the removed piston in the form of a white powdery substance. Any time dissimilar metals are joined with moisture, (ie: aluminum piston and cast iron cylinder walls) you will not only have rust, but galvanic corrosion. This galvanic "cell" is similar to a flashlight battery that uses 2 metals and an acid paste. Another example of galvanic corrosion is in you home water heater. This is why plumbing codes require dielectric unions with metallic pipes and the water heater manufacturer includes a magnesium rod in the water heater's tank to "plate out" and cover the cracks in the glass liner caused by thermo-cycling. If you free a stuck engine, the galvanic corrosion is going to render the rings immobile and you will have an "oil burner" as Jeff said. If you have a stuck engine and "unstick" it, then, it's the first step towards a rebuild. I wouldn't place any confidence in an engine that I needed to reliably do work that was stuck and not taken apart and rebuilt. You can use all the magic tricks and potions that you want. You may do this to an engine that you just putter around with, but the seized rings will either burn a lot of oil or will cause excessive wear on the cylinder walls necessitating a rebuld. I have "unstuck" engines in cars and tractors. I have, also, used previously stuck engines for a race car. In each case, the rings were immobile in the piston grooves which would result with oil burning, compression blow-by, or excessive cylinder wear. Ken McWilliams
Dayton, Ohio : try using #2 FUEL oil it is the same oil you would burn in your home furnace.take your spark plugs out fill the cylinders full and fill your crankcase full to,and let it set when ever you walk by the engine try to give a turn by the flywheel or by putting a wrench on the end of the crankshaft be careful this way takes time.I have had good luck with this.my dad showed it to me .I
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