The Stovebolt Site Forums The Shop Area Engine Shop WATER DAMAG IN ENGINE

SO I BOUGHT A 55 GMC 2ND SERIES IT HAS THE GMC 248 ENGINE
THE PREVIOUS OWNER LET IT RAIN IN THE CARB OVER A NUMBER OF YEARS
I COULD NOT CRANK THE ENGINE OVER BY HAND
I TOOK OFF THE HEAD, AND IT APPEARS THAT RUST HAS CORRODED THE PISTON WALLS, AND HAS FROZEN THE RINGS TO THE CYLINDER WALLS. I WOULD LIKE TO GET THE ENGINE TO CRANK OVER SO I CAN GET IT RUNNING...
WHAT WOULD BE THE BEST THING TO DO AT THIS POINT? SOMEONE TOLD ME TO SOAK THE PISTONS IN AUTOMATIC TRANNY FLUID FOR A WEEK OR SO TO DISSOLVE THE RUST... ANY OTHER IDEAS? HAS ANYONE EXPERIENCED THIS? AM I GOING TO HAVE TO SPEND 3K TO HAVE THE ENGINE REBUILT? OR CAN I UNFREEZE THIS ENGINE SOMEHOW...
IT ONLY HAS 35K ORIG MILES ON IT AND WAS RUNNING 5 YEARS AGO...
HELP

i found this in an issue of vintage truck. i plan on giving it a try on a powerglide 235 motor i got that sat for 20+ years. i hav tried the tranny + brake fluid mix and got no results after several months. IMO if this stuff has a money back offer, why not try it.

big ed

http://www.seized-engine.com/

LOSE THE CAPS LOCK. THAT'S YELLING, AND WE'RE OLD, BUT NOT DEAF!

Now, to your concern- - - - -soak the cylinders in a 50/50 mixture of automatic transmission fluid and acetone. It's the only thing I've heard of that gets better results than my favorite, Kroil.

www.kanolabs.com

After a week or more (sometimes much more), start trying to turn the engine by using a long pry bar on the flywheel teeth. You can get to them by removing the starter and using the chisel end of a carpenter's wrecking bar on the ring gear teeth. Be careful not to break the teeth. Sometimes using a block of oak or other hard wood on top of the pistons and whacking it with a big hammer will help to shock the rings loose.

There's at least a 50% chance the cylinders will be pitted so badly the engine will need to be bored out and oversize pistons installed. That's major overhaul time!
Jerry

THANK YOU VERY HELPFULL

Another to do is after soaking them take the oil pan off take disconnect the pistons from the crankshaft then take a chunk of wood and a 5 lb maul and smack them. This way you don't risk breaking flywheel teeth or damaging the piston. Its a little more work but it sounds like like your going to have to remove the pistons anyways to hone them.

Before I soaked mine, I take a die grinder with a wire wheel to remove the rust from the cylinder walls. Then blow it out with air to get as much of the junk out as possible. Then soak the pistons/cylinders down. That way the pistons will have less interference and resistance when taking them out.

Then if I pound the piston down some more, I clean it with the wire wheel again. Then I pound them up and out.

I like KROIL.

Kroil addict here, great stuff!

Transmission oil and Kerosene!
Tranny oil is an excellent penetrating oil and the Kerosene is the only mineral based product that is actually thinner than water!
Kerosene will seep into the very smallest of areas that even water could not penetrate.

We use it to detect cracks in engine blocks, heads, valve sealing problems etc. etc.
Mixed with tranny oil, it becomes avery effective anti-sieze.

Then do as advised above.... buff the bores, a lump of wood and a few driving knocks with a FBH.

Give it a go................Doc.