What is this hole by cp3?

Hoiyay

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Joined
Dec 10, 2018
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74
It's near the cp3 and under the intake grate.

It's a smooth and ling taper on the inside. Not sure what was there before.

It leaks oil pretty bad.

Do I need to plug it off? What kind of plug would work? It's unlikely a freeze plug, no way to get a hammer to it directly under the intake.
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3900956

parts.cummins.com
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Thanks. I'm running auto stores now....possible you could give me the expansion plug size please?

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555-082. 17.69mm

Close enough

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