Dieselfever
New member
Had a truck brought to me that was popping out of the intake while running. Pulled the valve covers and a couple sets of rockers to inspect them and they were worn pretty well, so I replaced the rocker sets on both sides with new. Fired it up and ran fine for 10-12 miles then it developed a squeak that turned back into the original popping; possibly worse now. I'm thinking a bad lifter, I had read about rocker problems but I'm not sure about lifters? is that common on these trucks? Any other insight. The truck is tuned and deleted, has 167k miles on it.