Tonight I finally got around to digging into my old 5.0 roller motor that was giving me grief many years ago. If memory serves, there was a horrible whoomping noise consistent with engine speed, that went away when I loosed one particular rocker arm. It's an '87 lowpo that got a stock rebuild with original pistons in about '04, and currently has an Explorer cam with original lifters, pushrods, and rockers, and rebuilt E7 heads.
I expected to find a wiped roller on one of my 34 year old original lifters, but after pulling four, one of which I'm pretty sure was on the noisy valve, darned if they don't look fine! I'm thinking the next step might be to borrow a borescope in hopes that I can see the cam lobes without having to remove the front cover.
It's entirely possible the valve got messed up somehow, so pulling the head may also be in order. However, the main anomaly I noticed when I pulled the intake was that the lifter retainer screws were loose! I don't remember hearing of that happening to anyone else, so I'm wondering if someone's had that happen and found it to be causing valvetrain noise.
I expected to find a wiped roller on one of my 34 year old original lifters, but after pulling four, one of which I'm pretty sure was on the noisy valve, darned if they don't look fine! I'm thinking the next step might be to borrow a borescope in hopes that I can see the cam lobes without having to remove the front cover.
It's entirely possible the valve got messed up somehow, so pulling the head may also be in order. However, the main anomaly I noticed when I pulled the intake was that the lifter retainer screws were loose! I don't remember hearing of that happening to anyone else, so I'm wondering if someone's had that happen and found it to be causing valvetrain noise.
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