Well, only the "good" side so far. Here a some pics of the valve seals on the left head, or what's left of them. #7 exhaust valve stem didn't slide out real easy like the others either.

Original carnage thread https://www.performancetrucks.net/fo...d.php?t=470198





#1 exhaust

#1 exhaust

#3 intake

#1,3,5 intake- scratches on #1 are from pulling it off. The others were already off or loose

#1.3.5 intake

#3

 

dayum!! that sux, deffinitely some major surgery needed!!

 

Whos heads?

 

ETP LS7 style LSX heads.

 

How much valve lift in your setup? And which valve springs are those?

 

You going to send them to MAST now to see what the root cause is?

 

Engine specs:

 

Hmmm, well I see that the heads came assembled to you. Not much info on which valve springs those really are. That cam & rocker combo puts you at .630 and .635 lift, on small combustion chambers. To me, it looks like the valve springs were not up to the task.

 

Apparently, the heads were shipped to the engine builder with the valves and springs assembled. Spring description is only "upgraded dual springs"

 

Are those the correct seals for that application? What do the valve guides look like?