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10-17-2009 #1
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Diff fill plug threads big problem HELP!!!
ok long story short my fill hole plug on my 12 bolt was not coming out period!! So I driled and drilled and used bits to grind away to finally get it out and I did but now them problem: I used a 1/2 by 14 npt to retap but I am missing little on the left side. I wanna know what tap size I can use now to fix it? I know I will have to go over size/find plug to fit and helicoils are not cheap!!! So can anyone lead me a hand on figuring this fix out?? Brandon
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10-17-2009 #2
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Maybe just use some silicone when you install the plug?
Jason Scheer
10-17-2009 #3
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No problem, you can use a plumbing expansion plug. There is no pressure in the differentail so it just needs to be sealed.
10-17-2009 #4
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Great idea now if I can find one that looks close to a factory look or a cool factor! Thanks and yes I have learned a lesson on plugs Guys!!!!!! Anymore ideas feel free to shot them my way. Brandon
10-17-2009 #5
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If it's a small area, fill it with JB weld epoxy, then run the tap in again.
How about a 3/4" pipe size? it's about .200" larger.
http://www.korit.com/tapndrill.htmDavid Pozzi http://www.pozziracing.com67 Camaro RS that will be faster than anything Mary owns.
10-18-2009 #6
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It is a small area say so wider then a finger nail on the pointer finger (average hand not monsters). 2 ideas I like now. Thanks and keep them coming guys!
10-18-2009 #7
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Got a pic to post? If so, it may open up some other avenues to explore.
Ric
2002 s10, DD and AutoX.
1966 Malibu owned since 1971. Drag car converting to track toy!
10-19-2009 #8
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Weld a plug into rear end cover and epoxy factory hole shut
10-25-2009 #9
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Shouldn't be too hard to drill out to 1" and tap with a 1" npt tap. No Heli-coil will be needed. If you go this route I would suggest draining the differential and cleaning it because of shavings that may have gotten in. The plug you need will be a 1" with a 1/2" internal square drive.
Don L
Keep the rubber side down.
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