I have seen only one lobe wiped out many times ! Zink break in and proper procedure helps . A bad Cam can loose a lobe from improper manufacture . Who knows .... Proper break in procedure must be followed !

 

Dammit. New cam. And rip it down again?

 

Do some inspecting first ... If you have a loose push rod , something is not correct . A wiped out lobe is possible , but inspect all of the valvetrain components to be sure no other issue is present .

 

See if you can fish the suspect lifter out of its bore with a long flex magnet and inspect the face of the lifter for wear/galling.

 

Already tore it down. Pulled the suspected brand new lifter. Replaced it with the best of the worst lifter from before. Ran great cold and loaded. Hot and loaded no good. So inspect the valve train. Could I have too much lash in my push rod? And what is the obvious correct way to do your valve lash?

 

Hydraulic lifters that is. Lol

 

I just remembered something about the intake on my Mustang. Make sure that the pushrod has plenty of clearance where it goes through the intake manifold. I had clearance issues with pushrods and had to clearance the intake with a dremel bit.

 

I'll look tomorrow

 

Suggestions on setting valves? Zero lash then 1/4 to 1/2 turn?

 

I would go 1/2 to 3/4 turn

 

Bump the motor. Once the rocker moves tighten the other one?

 

So then it's possible my valves are too loose hence why the push rod drops?

 

When you check the intake for pushrod clearance, cycle then motor around at least one cycle to see the intake clearance from valve open to valve closed.

 

If all you did was a 1/4 turn, then it's possible. 1/4 turn after 0 lash isn't enough.

 

Will do. I'll get on it tomorrow after work