I know what you mean about the noise. I noticed a different (louder) sound after changing the oil...another reason I checked the lash even though I adjusted the lash a couple months earlier. I have a 71 Camaro 427 with a fairly new roller hydraulic cam that I am running redline in...I hope that is ok

 

i would pull the lifter check it out, sounds to me like the rocker arm needed adjustment and backed off. if needed change the lifters and change the oil and go on.

I have run a solid roller on the street and strip and have 10k miles on it, i had adjust the valves every weekend if i race it, or once a month if just street driving it.

 

If you run a stout HR with high pressures youll need to check ie preventative maintenance anyway so whats the difference get the mans cam.

 

I performed a root cause failure analysis on failed solid roller lifters a couple of years ago. The windup was that every single one I inspected failed from metal surface fatigue failure. Oil viscosity and oil pressure had ABSOLUTELY NOTHING TO DO WITH THE FAILURES. So, don't beat yourself up about what oil you ran. It DOES NOT matter what viscosity you use or how much zinc is in the oil. Because oil has nothing what so ever to do with fatigue failure.

To begin with, those little needles are overloaded in a solid roller lifter application. Sure, higher spring pressures don't help, but what really kills them is the jack hammer pounding they are constantly subjected to. And it doesn't matter how wonderful the cam lobe's opening and closing ramps are, because the lifters bounce around within their lash slop and don't follow the ramps. The larger the lash, the worse this is.

For those of us who insist on running solid roller lifters, we must keep a very close eye out for any lash changes that are unusual. Because that is a clear signal that the lifter involved is going south. And if in doubt, pull the lifter and inspect it to be sure. Running these lifters is a high maintenance proposition.

The best thing we can do is run a bushing type solid roller lifter such as the Isky EZX's.

540 RAT
Member SAE (Society of Automotive Engineers)

 

From a design perspective I think when subjected to hammering effects, the bushed lifter is going to fail as well due to fatigue.

There is simply not enough oil pressure to lubricate it properly.

 

and yet you didn't wax it - there's the problem

whatever... good luck with your issue