8500 on startup?no sir.the first time she gernaded,it looked like it streched a rod bolt,or lack of oil to rod bearing,i'm not sure yet.(i'm leaning towards lack of oil).the second time,pulled the rod bolt through rod cap.do they need resized?boy howdy!!!!!! do they ever,she twisted em up like a predzel.here are the parts,4340 lunati,h-beams,je pistons,arp 7/16,childs & albert.