I'm not to sure what rights I have, it's pretty much my word against his. I don't have a warrenty or anything like that. It was a lightly used race engine that I had planned to freshen up with new gaskets and some minor head work. I think that trying to go after him with legal actions will pretty much just dig my wasted money pit deeper. You just can't trust anyone anymore. Even if the guy truely didn't know of the problem he is still refusing to make a deal with me to partially help rebuild the bottom end. The crank, rods, and head all seem to be OK. It would need new pistons, rings, bearings and a bore to fix it, I'm just bummed out and turned off from the car scene lately. We'll see, maybe warmer weather will change my thoughts, but rising gas prices have me wanting to swap the sentra for something new and slow. Honda Fit!!!!