Stuck k341
 

Hey guys,
My new 169 has a stuck engine, it had plenty of oil in it, drained it out, no shavings or metal chunks, pulled the head, piston is down about an inch, cylinder looks good, no scoring, intake valve is all the way up and not stuck, exhaust valve is closed, tried turning the engine over with no luck, it's tight! Could the piston really be holding it this tight? If it isn't broken inside I'm thinking pull the rod cap and inspect everything and move rod out of the way and hit the piston down? I'll be pulling it out soon, thanks for any suggestions.

Spray around the piston with pb blaster and let it soak,

I have been with Kroil and MMO, may try some Diesel.

Pulled it apart, disconnected the rod, nothing broken or scored, crank is not moving, looks like it's time to come out and replace the bearings.

you should pull the flywheel off and see it there is something stuck behind it,if you hadn't already done so

I was wondering if it had balance gears in it?

Heard a story once (true) about a guy who had a motor lock up on an S-10 pickup. Undaunted, he tore it all down. About halfway though, he realized the motor wasn't stuck. He went ahead and tore it down and rebuilt it. Upon reassembly, he put it all back together, went to start it and it wouldn't turn over. Ended up removing the belt and found the alternator bearings seized tight.

Storal of the morey, check the obvious before you tear it down.... oops. Too late for that.

I had a K series engine this summer with that problem. A guy gave me the whole 1250 tractor because the engine was locked up by a mouse nest and other stuff behind the flywheel.

Like the OP, I pulled the head, then the pan. Then my light bulb came on. A little cleanup and the engine purrs like a new one.

Yes it has balance gears, I know better to check the obvious, I did, checked the starter bearing, it's fine, cleaned out the mouse nest, I will be pulling the flywheel.

:popcorn::popcorn: