Hey my friend has a d16z6 with a loud ticking, he used an engine stethascope and said the loud noise was coming from the head. He ran it for me a few times. I am not completely sure the tick was coming from the head. Does anyone know what could be ticking? The rocker arms on the #1 or 4 cylinder intake side(whichever is on the right when you are looking at the car from the front) seem to have quite a bit more play than the other rocker arms. If anyone knows what the culprit could be please help. Also, the ticking will stop at some points at idle and low rpm but as soon as you rev it will come back strong. Also he drove for about 7000 miles with the tick, and since the car no longer is making much power at all. To me that seems like it would be bottom end. He has taken the head off and looked at it but nothing is looking wrong. He adjusted all his valves to spec so its not that. Thanks in advance for the help.