Okay i have a 97 dx coupe with a 99 front end, mugen front lip, type R rear lip, si spoiler, leather seats, ex gauge cluster, Integra type R yellow paint perfectly applied and some rota gun metal rims. It used to have a supercharged B16 but currently has the D series motor back in it. Well After smogging it etc me and my friend just decided to play around with the dx motor by running it a little. Everything was fine on the freeway after running it and then about 5 min later i get a serious engine knock in the parking lot. The knock only occurs at 3k rpms or above. If i rev it for s couple of seconds the knock well begin to occcur at idle rpms as well and slowly go away. We checked the valve lash on all the cylinders intake and exhaust ports expecting one of them to be seriously off since it sounds like only one cylinder is knocking. However they all came in the same considering i just tightend them to specs a couple of weeks ago. So i have put the valve cover on and had my dad listen to the sound. He only knows about domestics and said he thought it kind of sounded like a spun cam bearing on a domestic. He pointed to the the sohc cam gear cover and said it sounds like its comming from there, right most top of the motor in the head. So any ideas or thoughts on this motor, even though its a stock dx motor i was planning on just leaving this one in for awhile till smog is done so i dont want to let this motor blow.