EPIC nuts/studs loosening thread (reposting stupid stuff without reading = warning)
#961
tighten them up, tack weld at the flange. relieves the stress from the studs. they stay tight after that. you can still remove the turbo later if needed by breaking the spot welds. you don't have to tack all the way around either. just the top and maybe 1 or 2 on the side (vertical) front facing side, so you can easily remove them if needed. spookyfish tacked the bolts to the flange, but i think if the bolt breaks it won't stop the problem, although i don't think he has had any problems.
#965
Former Vendor
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Mike, it's a lot of work but what you can do is remove the turbo and manifold, get the hardware re-installed and snug, and then drill it all for safety wire. It will still leak a little, but you'll be able to run full sessions.
#970
Tour de Franzia
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Savington killed SS safety wire. I think I drive pretty hard, locals will probably agree, and I've had 4-track events on inconel safewire from aircraft spruce. I pulled the turbo after 4-track events and every CHRA bolt is still tight.
#972
Cpt. Slow
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Generally castle nuts. This briefly covers it, mainly in the pictures:
Safety Wiring - More Than You'll Ever Need to Know
Safety Wiring - More Than You'll Ever Need to Know
#977
Right in this thread. Click here:
https://www.miataturbo.net/forum/t35874-35/#post452177
And here:
http://www.mcmaster.com/#a286-super-...screws/=5v3hf6
https://www.miataturbo.net/forum/t35874-35/#post452177
And here:
http://www.mcmaster.com/#a286-super-...screws/=5v3hf6
#978
They are indeed so elusive I bought about 100 of them from ebay. about 30 are Rene-21 in 5/16 and the rest are A 286 in 5/16 or 3/8ths. I drilled and tapped for standard hardware, only because all the jet guys use standard size.
McMaster won't have the rene stuff, and maybe not the A286 stuff either. Its usually Mil/aerospace spec for GE/Lockhead/etc.
If that doesn't work for you, call these guys. They are awesome.
Home
123 North Pine Street
Indianapolis, IN 46202-3844
(317) 269-1520
Honestly, I have no desire to try and package and supply kits anymore. It works for me, you can try it if you care.
WTF is Rene-41?
*EDIT* P.S. If you go with RENE-41, expect to go through about 1 bit every 1-2 bolt heads if you drill for 1/16-3/32's for lock wire. Not likely you can get a good bit OTC at a hardware store. Get some good high-speed carbide bits. It sucks to cut, but it can be done. Use a good cutting oil too. The A-286 I can do between 8-12 on one bit using the same technique, but its slower on rene.
McMaster won't have the rene stuff, and maybe not the A286 stuff either. Its usually Mil/aerospace spec for GE/Lockhead/etc.
If that doesn't work for you, call these guys. They are awesome.
Home
123 North Pine Street
Indianapolis, IN 46202-3844
(317) 269-1520
Honestly, I have no desire to try and package and supply kits anymore. It works for me, you can try it if you care.
WTF is Rene-41?
*EDIT* P.S. If you go with RENE-41, expect to go through about 1 bit every 1-2 bolt heads if you drill for 1/16-3/32's for lock wire. Not likely you can get a good bit OTC at a hardware store. Get some good high-speed carbide bits. It sucks to cut, but it can be done. Use a good cutting oil too. The A-286 I can do between 8-12 on one bit using the same technique, but its slower on rene.
#979
Here's what's left of the lower front stud. I tried tightening it up this afternoon and it popped back out after driving 2 blocks from my apartment.
DSC_1755.jpg?t=1266546809
DSC_1755.jpg?t=1266546809
#980
Anyway, one more thing to add. I showed my setup to an instructor today and he mentioned they used to have issues with the garrets' flange warping. he said that the flange would warp in around the bolts and then you would get a leak in-between the two upper bolts/studs. He says the remedy they figured out was using a metal gasket with special raised edges around the bolt holes and around the exhaust opening. This is on the turbo-manifold junction.
Oh, this professor used to work at the SRT department at Dodge, he was there for about 20 years or so. He knows a good bit. Plus he's British. We all know their cars break a lot so he must have mad skill, no?