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 Posted: 04-14-2020 05:18 pm
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Esprit2

 

Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 575
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 Yes, drill through. A shallow, blind hole that goes nowhere would do nothing.

If the oil pump and the rest of the system is in good working condition, including the correct oil viscosity choice, then the small hole won't have a significant negative effect on either pressure or flow rate. But the hole will help to shorten the time required to build oil pressure during engine start-up.

Regards,
Tim Engel