Posted by CNHguy on November 25, 2007 at 20:18:50 from (208.103.143.9):
I am a ford man, never dealt too much with these before. (before you hang me, my favorite tractor and first restoration is a 1953 Farmall Cub) I have an IH 205 combine that hasn't run in 2 years and it is froze up. I dumped an entire can of PB Blaster into the 6 cylinders and put the spark plugs back in to let it soak for the night. By the way, I hate to say that I totally dislike the cylinder head design of those engines. you can't get a socket onto the plugs unless it is paper thin. Does anyone know what drives the oil pump? If it is the distributor, I could pull it and try to prime the bearings in the engine before I start turning this thing over. I would assume that they are not the reason the engine is frozen, since everything looks nice and the oil is a nice color and is dead full. I suspect the piston rings have seized to the cylinder walls.
I let it soak for about 30 minutes and started turning the engine over by putting a prybar against the teeth on the starter ring on the flywheel. I could only go about 60 degrees and it took quite a bit of time. I can't brace the prybar right to turn it back(actually forwards, since I was going backwards to begin with...) and it was getting a little bit tighter so I stopped. I don't think anything could have crept up in there. The exhaust manifold has some sort of heater on it that restricts exhaust until the engine is warm. Does anyone know how big the crankshaft pulley nut is? I was thinking of putting a socket on it to turn it, but I don't think I have the right size. It's pretty big. It's deffinitely bigger than 1 1/4". If anyone has any sure-fire ways to gently free this thing up, or any homemade recipes for some good penetrating lube, I would like to hear. The motor ran real good last time it was going, and it only has 1400 hours on it. I just recently bought another 205 combine that runs with the same engine. I tried seeing how hard it was to turn it over by pulling on the drive belt that goes to the transmission and it is really hard, even on a good running motor. I don't want to risk tearing up a good belt trying to pull on it or doing something stupid. I'd like to get this engine running so I can get the combine home. thanks
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