That's rough dude, try getting a ratchet and socket on the crank pulley and see if you can turn it over.Ok I replaced the exhaust gaskets. Engine ran smoothly all codes never came back. It started knocking and now it won't Crank over. I'm most certain it now needs a new motor... This is sucks so bad right now.
I think it was 22mm, and that's not too bad, just be careful bc I've seen more than a few people listing engines as a 251/253 when they're actually selling you a 20E/203Yea it sucks really bad. I'm going to check it out tomorrow morning. What size is the Crank pulley? Also i found a motor for $795 basically $800 with 80K miles on it. Tested and everything. I'll probably get that and swap it out.