Re: STUCK Engine....and I mean STUCK

Posted by Ken McWilliams on August 02, 2000 at 19:39:09 from (152.163.194.209):

In Reply to: STUCK Engine....and I mean STUCK posted by Mark Sanders on August 02, 2000 at 18:24:34:

Mark,
I'm sure you'll get plenty of comments on how to free the engine. I've done a few myself.

Generally water standing on top of a piston will cause galvanic corrosion. That means dis-similar metals with an electrolyte (water) will corrode. If you take apart the engine, you will find a powdery white dust. That's the product of the aluminum piston and cast iron block going through the process of galvanic corrosion.

You may free the engine a few different ways.

If it is standard shift, pull it and pop the clutch in high gear.

Take the inspection cover off the bottom and engage the starter ring gear with a pry bar.

Place a socket and braker bar on the bolt head holding the front pulley onto the crankshaft.

Remove the heads and use a soft material: oak, aluminum, etc. and pound on a piston that is about 1/2 way down the bore. This is the best position giving the greatest chance of moving the crankshaft. Because it is at 90 degrees to that piston.

Regardless of how you free the engine. The cylinder having the water caused corrosion will have the rings corroded into the piston grooves and will not seal the compression or oil. My experience has shown it will have to be removed, the rings removed from the piston,(they will have to be broken out of the grooves), and new rings installed.

The last engine I freed took about 1 hour per piston to remove the rings and to clean the grooves. I was able to salvage the pistons. I did, however, have to install new valves. The edges of the valves were eaten (corroded) away.

Ken McWilliams
Dayton, OH

Follow Ups:

• Re: Re: STUCK Engine....and I mean STUCK JJ GEER 08:23:33 05/08/01 (0)

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