Topic: what is this?

[sharpxmen]

this is a guess but i think it's just a plug to not have water dripping on the starter - i think that hole is for factory handling during machining process - they need pilot holes to align and fix the block solid during the bore-out process of all the precision areas for the crank, cam, cylinders (but i can't tell for sure, so don't take the plug out :D)

[chardrc]

why would they have a plug to prevent water from dripping on the starter when oil dumps on it when you take the oil filter off??? but you could be right

[BarneyJeep]

its not in any kind of channel...i tried to pull it out and nothing came out, couldnt get the plug out either....almost like it was attached inside the block.

[sharpxmen]

its not in any kind of channel...i tried to pull it out and nothing came out, couldnt get the plug out either....almost like it was attached inside the block.

i dunno then, i've seen those holes on other blocks too but no plugs on them