Looking down the lifter bore the cam looks good. The lifter base looks good.
The top of the lifter with the seat removed. It was fully assembled. I removed the retaining clip amp pulled the push rod seat. Anybody see anything?
I am thinking that lifters should hold more or less indefinitely. I am wrong in thinking this?
I think when the lifters get oil they stay for a LONG time.
Nothing looks really all that wrong in there? Kinda an interesting failure.
Agree on a lifter not bleeding down in any kind of normal operation.
Weird problem. Oil passages to lifters clean? Maybe if there was debris intermittently starving the lifter of oil…
I’d change the entire set and break it all in again.
Well it just gets worse. The rocker arm is galled inside
Some of the there rockets are showing blue marks that look like heat scoring to me
I did find a tiny piece of hard metal inside the lifter
After more study I think the core problem is that when the heads were drilled and tapped for screw in studs they probably did it by hand. I think the studs are not square to the head and they are causing misalignment of the rockets push rods and valves.
I find a set of known good '68 J code heads with rail type roller rockers. They are dusty but low mile rebuilt by a Ford dealer tech and local club member.
A couple more pictures of the heads
If anyone sees anything odd I would like to hear it. They do have the 4V cast in
Seems likely there is additional debris from drilling/tapping the studs still circulating in the oil passages. Maybe a combination of lifters not fully pumping up and the misalignment you noted. Replacing the Frankenheads is the way I would go too!
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