HELP: Striped my diff plug (case side)

cystem · 08-07-2012, 04:03 PM

So the little bro was helping me and i was obviously not watching what we was doing and he stripped the diff drain plug out of the case!!! apperently in his world its righty lossy...

So as a temp fix i have some Teflon tape and RTV holding it in place, i can get it about hand tight ~10ft/lb befor it pops out again, its holding for now at least.

The best plan i can come up with for a fix is retappping (insert alternative suggestions here

)

trouble is while i am faily certain that the stock plug is M26x1.5 finding for instance an M27 plug is fairly hard to do.

I talked with Dimple and they sugtgested their 3/4 NPT size plug which he measured to be .003 inch bigger then our T70 M26 plugs. (apparently NPT has a standard for tread taps? not really sure but he measured the diff with his fancy tool)

Im hoping some one can give this idea their blessing, or in a perfect world help be find an alternative (Link to a M27x1.5 drain plug?), changing out the diff case in not an option.

In case anyone is interested this is a 2006 4EAT Forester.

Thanks in advance
- Jack

orderingchaos · 08-09-2012, 08:43 AM

How are the threads on the plug itself? If they are ok couldn't you get a heli-coil or similar deal and put that in? I used a heli-coil kit on my engine block for the header bolt and its still holding up fine.

A1337STI · 08-09-2012, 08:48 AM

Ya, I'd try a heli-coil (heal a coil ?) on there first. supposedly if they work its fixed back to as good as stock ...

and your 1/4" plan can be your back up plan.

bradyarz · 08-09-2012, 08:49 AM

That sucks! I'd have to echo the heli coil advice though. That's probably your easiest route. I guess the other alternative would be to bore it out and re-tap.

cystem · 08-09-2012, 09:22 AM

The hellia coil idea sound cool. I'm going to stop by a local engine builder as he's the only one in the area with a tap big enough. I'll have to bring up that idea. I hope they make one big enough lol. I'll keep you guys posted

08-07-2012, 04:03 PM	#1
cystem Regular Contributor Car: Silver 2010 2.5i N/A Join Date: Sep 2011 Location: Chicago land Thanks: 9 Thanked 14 Times in 13 Posts	HELP: Striped my diff plug (case side) So the little bro was helping me and i was obviously not watching what we was doing and he stripped the diff drain plug out of the case!!! apperently in his world its righty lossy... So as a temp fix i have some Teflon tape and RTV holding it in place, i can get it about hand tight ~10ft/lb befor it pops out again, its holding for now at least. The best plan i can come up with for a fix is retappping (insert alternative suggestions here ) trouble is while i am faily certain that the stock plug is M26x1.5 finding for instance an M27 plug is fairly hard to do. I talked with Dimple and they sugtgested their 3/4 NPT size plug which he measured to be .003 inch bigger then our T70 M26 plugs. (apparently NPT has a standard for tread taps? not really sure but he measured the diff with his fancy tool) Im hoping some one can give this idea their blessing, or in a perfect world help be find an alternative (Link to a M27x1.5 drain plug?), changing out the diff case in not an option. In case anyone is interested this is a 2006 4EAT Forester. Thanks in advance - Jack

08-09-2012, 08:43 AM	#2
orderingchaos Registered Member Black 99 RS Join Date: Jan 2011 Location: FL Thanks: 11 Thanked 12 Times in 12 Posts	How are the threads on the plug itself? If they are ok couldn't you get a heli-coil or similar deal and put that in? I used a heli-coil kit on my engine block for the header bolt and its still holding up fine. __________________ Oh yes mustard! That'll do... Mustard? Don't let's be silly. Now lemon, that's different...

08-09-2012, 08:48 AM	#3
A1337STI Senior Dirty Member Car: blue 05 STI & 93 RS Join Date: Mar 2008 Location: Reno,NV Thanks: 104 Thanked 148 Times in 121 Posts	Ya, I'd try a heli-coil (heal a coil ?) on there first. supposedly if they work its fixed back to as good as stock ... and your 1/4" plan can be your back up plan. __________________ Alex Rademacher 2006 to now: 14 championships (Stage Rally, RallyX, AutoX, Club Trials) and counting ... Rally Betsy Member Journal! I rally with products from gorillaoffroadcompany.com

08-09-2012, 08:49 AM	#4
bradyarz Regular Contributor 08 OBS/04 Fozzy Join Date: Jun 2011 Location: Eastern PA Thanks: 16 Thanked 31 Times in 31 Posts View Photos By: bradyarz	That sucks! I'd have to echo the heli coil advice though. That's probably your easiest route. I guess the other alternative would be to bore it out and re-tap. __________________

08-09-2012, 09:22 AM	#5
cystem Regular Contributor Car: Silver 2010 2.5i N/A Join Date: Sep 2011 Location: Chicago land Thanks: 9 Thanked 14 Times in 13 Posts	The hellia coil idea sound cool. I'm going to stop by a local engine builder as he's the only one in the area with a tap big enough. I'll have to bring up that idea. I hope they make one big enough lol. I'll keep you guys posted __________________