Just got the rebuilt motor in my 94 running last week and there is a whirring noise coming from the valve covers. I don't know if the pushrods are slightly too short or the 1.73 Scorpion roller rockers just make that much noise. When the rockers were installed they were all tight with no play so I thought the pushrods must have been long enough. They don't make any ticking noise or anything just like a meshing gear type sound. I got the comp stage 2 cam from scp with the comp 942 springs. The sound is the same from idle and only gets slightly louder as rpms rise. It runs perfect so are they supposed to be that loud?