I have a jdm b16. When you first start it, it idles high to warm up as it should and sounds wonderful, but then after it heats up there is a horrible valve noise. I have recently adjusted the valves near perfectly (spent a long time makin sure they were on the money) and it has not stopped. Its not a consistant noise, as if it were just valve lash...its alittle bit random. But the kicker is, when i hit vtec the noise going away. I have not had a chance to check the oil pressure yet (due not not being able to find a sending unit to fit) but it sounds like it has low oil pressure to me. Could this be a clogged pump, or oil galleries? any other suggestions?