Okay so I have been hearing this noise since I had bought the car a few years ago. It's a Tic/Knock noise definitely coming from the head, it seems as if it has gotten louder in the past few months. But it only is loud at the initial cold start up of the car, once the car is warm the noise isn't their as much and if it is, it's very faint. Looking for ways to diagnose the problem? Thank you. (2g head, 1g bottom) (head rebuild 7000miles, upgraded 264? cams, lifter valves etc..) 97 Gsx.