Okay,  as most of you probably knew I am building a race ecotec motor.  Anyone that has every tore an ecotec down might be very very helpful at the moment.  I have run into a snag and cant put the engine back together yet.  I purchased a bare bone ecotec block for my build-up since the other one was completely destroyed.  Right next to the balance shafts there are 2 small plugs on  the front of the motor that sit next to a bolt that holds the balance shaft in.  I am unable to find a plug to fit this.  My GM dealership regardless of me showing them the block in person and also diagrams says for some reason there is no plugs for that.  I on the otherhand know better I had pulled them out of the old ecotec motor to see if I could find a performance or engine rebuild shop match them up.   At this time it has been 2 weeks and I have turned up empty handed every single time.  Every oil galley plug I got from napa or another local parts shop has either been way too damn small or way too big.  
What do I do????  If it comes to it I will probably just have to tap the hole and find a plug that can screw in flush.  Has anyone replaced these 2 little plugs?  If so what is the part # and where can I get them.  You really wouldnt believe how frustrating this is knowing that 2 small pieces could stop this from going back together.  If anyone has any suggestions that is valuable to me then It would be greatly appreciated.
Craig
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2.2 Ecotec Swap Completed!!! 
 
 
drill it and tap it for NPT threads.  Those are the only threads you should use for a high pressure oil plug.
use 1/8" OR 3/8" NPT.  whatever size fits up the best.
-da chinchilla  
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wait, cant you use the ones from the old motor?
LE61T PTE6262 Powered 
 
 
no,  basically it is a really tiny freeze plug or (Expansion Plug) as some would call it.  you have to damage them to take them out.  I only took the ones out of the blown engine to find some at the parts stores and nobody had anything to match them.  If I remember correctly since I did this at work.  the Plug measured 12.75 mm  or maybe it was 13.75  ,  When I talked to the guy at the dealership he gave me hell saying there is no plug in that area.  To prove it I made him come out to my truck and look at the engine block.   (At the time I had the blown engine block and the brand new one in my explorer with one of the old oil galley plugs still in it.  The guy looked for 30+ minutes couldnt find a damn thing about it.  
So when I talked to the machine shop tech at napa,  he looked at it and told me that those plugs are rare and very hard to come by.
Thanks jiggamon,  Thats what I wanted to know is if I should tap it or not because i cant find the things. 
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2.2 Ecotec Swap Completed!!!