intake valley (oil galley) 3/4" cup plug leaking - use sealant/RTV??

well as for getting it out, if you can get it cocked at an angle and pull it out with pliers thats one way, just like you would a freeze plug. ofcourse if your worried about knocking it further in you may have to get crafty but because that is an oil galley i would shy away from the drilling...........however, if your talented, you could take a small bit, like 1/16, and drill it to where it is almost through or barely through, and try to put a screw in it and pull it out that way, that would minimize the chips but that would be a last resort!!
as for installing the new one, when the old one is out clean the hole real good, and use some carb cleaner on a lint ffree rag to ensure its clean and dry. they make some sealers for stuff like that, checker used to sell this stuff called and i kid you not " indian head " gasket sealer. a light coat of that can help. what they usually do though is something called " stakeing it " which is where after the plug is installed you take a chisel and kinda steak or hit a couple sides of the the block itself. so the block has a couple sharp spots that keep the plug from coming out under pressure. i'm not sure how to explain that procedure...........lol..........but it's easy to do.

as long as the socket was reasonablt sized in proportion to the plug it should'nt have made the plug more concave hense making it looser......i know they stake plugs in conjunction with usin that sealer.....usually staking the plug hole doesnt screw it up to bad. you should only have to mess with that plug when the engine is rebuilt anyway so having the plug staked in i wouldnt think would be a problem......but see what every one else says and see if they have any alternative suggestions that may be better.............

Simple, just take the bit and dip it in wheel grease that will catch 99% of the shavings), then drill very carefully and then yank it out and install a new one, run it for about 15 minutes and change the oil.

i am trying to think how far down that passage goes. for example, even with freeze plugs you usually can knock them in and then get ahold of the edges and yank it out with pliers.........but i'm not sure how far down that plug would go if you just knocked it in..........a dull drill bit would probably just make smaller shavings and take longer........as i said before if your carefull and you maybe used grease as suggested and a very small bit then after the small hole is through you could carefully thread a srew in and pull it out.........i dont recall people having to drill them like that though i think it may be possible to just knock it through and retrieve it with some angled needle nose pliers..........you may wanna get a confirmation from some one on that though as im not 100 percent positive..... also, if its already a little loose on there carefully taping one side of it might enable it to **** at an angle to where you can just grab it with some pliers........

id use some of that indian head stuff on a new one as that stuff is made to seal more permanently than rtv....then stake it a time or two..........also, in the above post i was trying to say hit it at an angle so that it calks side ways...........i used a more traditional method of spelling it and it got *** out..........lmao.........go figure.