Motor is a '65 200 ci, non-adjustable rocker arms
Last month the motor sounded like a cylinder had gone, and after a compression test identifying #6 I pulled the valve cover and found a push rod had jumped out from under the rocker arm. Push rod appeared straight and rocker arm was moving freely. I pulled the rocker arm assembly, turned the crank and the push rod in question appeared to travel up and down sufficiently compared to the others (so not cam?). I re-seated it under the rocker arm along with all the others, reassembled, and that resolved the issue for the the next few times I ran it. On last start though, from the sound of it, it has reoccurred.
My first guess is cooked lifter. Am I right I have to pull the head to replace that? Some conflicting info out there on that.
Other thoughts on root cause? Anyone seen this before?
Thanks
Mike