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Casting flash?

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Just a quick question,

In the attached pictures, I see what looks like casting flash. I believe those are just oil drains. This is right next to the main bearings.

Should I grind these out or leave them be? The engine has already seen 230K KM but this rebuild will demand more power.

What are your thoughts?

Attached Files

I'd grind these off as a matter of course. In fairness though they look pretty substantial and aren't likely to be in danger of breaking free. It'll take all of 5 minutes to clean them up if you are already rebuilding the engine then there's really no reason not to.