What's this? Little hole in valley pan?

[saburai]

Hi Gang! More help needed. But, hey someone has to be the new guy...
I pulled the CDR and the grommet, gonna poke the oil drain hole for the turbo oil drain. I vacuumed it out and pulled the old grommet. So I'm looking around and I see this little hole about an inch behind the CDR hole, almost under the gp relay. What is it and should it be open like it seems to be?

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[bj_idi]

thats a square drive 3/8 it holds the valley pan to the block. also the bolt is hollow and drains to the back top of engine

 

[bj_idi]

Drains right back where that 1/4" port comes up

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[saburai]

Thanks Gents! Sorry for the dumb fng questions

 

[IDIBRONCO]

Don't worry about it. We're here to help.

 

[bj_idi]

Don't worry about it. We're here to help.

exactly!