Quote Originally Posted by Jake99 View Post
Mine does the same thing, I had the oil pump oring go bad on me and didn't know till after I replaced the lifters (cause I thought it was the lifters) but it still does it just at that rpm now. Been that way for a while and never gets worse, im guessing I damaged a lifter seal from low oil pressure and the lifters bottoming out.

When I installed the oil pump o ring, I made sure everything was 100% correct ( I have heard the disaster stories on the forums). Plus I has the engine upside down on the stand so i could verify everything. I really dont think it is that, plus my oil pressure never dips down below 40 psi. Any other suggestions?