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Do not leave epoxy exposed to oil, it will eventually swell and dislodge/debond. Why would you want to use an epoxy with a vibrating oil pump.

Astrobuf

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Vibrating oil pump? It would seem If you have harmonics that severe his pick up would be the least of his worries.

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An oil pump is a bit like a tuning fork. The pickup is flexible and has mass on the end. Take a hammer and bang on an oil pump, you'll see the pickup wiggle, especially at its resonant frequency. The engine firing pattern does the hammering.

Astrobuf

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Hmmm! You sure sound convincing.

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I have broke off the entire oil pump from a BB chevy more than once from tire shake. They make a brace to keep it from happening, I fixed it for good by going with a belt driven external pump.

When you start making power you learn about these things.

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I agree with the tire shake issue, That is an effect from outside the engine.
Im just not sure about the comparison of Banging on the case of a oil pump with a Hammer and resonant Harmonics from an oil pump operating as intended.

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Trust me, I'm a Mechanical Engineer with an extensive background in structural mechanics ;p