Name that knock- Solved

Lustle said

Sounds lower though doesn't it? With how fast it is thought I really wanna say valvetrain. Lifters? Man I hate trying to diagnose over video lol.

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Thanks guys. It sounds kind of deep but the frequency seems too high to be a single rod, unless all eight are bad. Unlikely. It has a definite solid thud to it. I'm hoping it's something up high in the valvetrain or external.