So I bought a non-running 200x on craigslist. The guy told me the timing chain was loose so it made some noise (yeah right buddy). So I thought I would try to get it running. I got a good spark, gas, had compression. Wouldn't start with a kick but I got it to fire a couple times. So I hook it to the back of a 300ex and have my friend pull me. I put it in 2nd gear and the engine turned over but wouldn't fire. Then it made terrible noises. Sounded like a chain binding up or somthing, possibly some knocking noises too. Anyways, it would still kick over fine but felt like it had less compression kinda and sounds like metal scraping metal when turned over and when I try to kick it over or when I turn the flywheel, it will lock up until turned over backwards. Anyone know what could cause this? I'm assuming rod bearing or crankshaft bearing? And I want to know how hard it would be to replace the crank bearing. I know you have to take the whole engine apart to replace rod bearing.
Thank you for reading and any help is appreciated!!