can someone tell me what i'm doing wrong? lol. my first 3.8 got a rod knock at 54000 km, the second motor at 78000... the only mod i have is a k&n cone that's located down where the air resonator used to be, and i'm thinking of moving it to where it's supposed to be and building a cold air box for it. any ideas? if the third engine is going to knock, i'm gonna sell her.