I bought this car about two months ago I have always wanted a GN the car has around 100,000 miles on it, body in great condition seemed to be a good deal, just a little history, when I done the burnout I drove the car about two miles tp my house then it started knocking about a quarter of a mile from my house and then I parked it, I did check the turbo seems all good I pulled the cover off the torque converter all seems good, and I pulled one side of the valve covers off it was good I’ll get the other off tomorrow and check it , really starting to sound like bearings, can you just billed the bottom half or would it be better just to pull and rebuild? Guys I really appreciate all your guys advice!!!! Im no mechanic so probably going have to take to someone.