I know this topic has been addressed on this site at least once, but I haven't been able to find the thread again.
I have 1993 truck with the 4g64 with 205000 miles on it. I think the lifters are going out, mystery oil fixed them once, but I changed the oil and the noise is back.
Has anyone got experience with switching to adjustable lifters? Or should I just shell out some cash for new hydraulic ones and hope that this fixes the problem.