what is the problem sorry I must of missed your old thread. I thought I had valve or lifter problems once, really sounded like it for sure, higher rpms it went away. It turned out my damn dipstick tube was loose and was vibrating slightly...I dobut thats it but worth a chance looking for that sorta thing. I could of sworn it was lifters or valves even my mechanic said that at first then we busted out a copper tube (hollow) and put it to your ear to pinpoint where the noise is comming from...
im tired as hell and prob sound retarded but good luck