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> Exhaust stud nuts. 911 vs 914
rhodyguy
post Jan 19 2018, 01:14 PM
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Will they work? Tired of the copper colored ones the Cap'n detested. I've never trusted the torque value due to the ovaled holes and the way they tightened.
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mepstein
post Jan 19 2018, 01:21 PM
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Are you talking about the 911 barrel nuts
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rhodyguy
post Jan 19 2018, 01:31 PM
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I looked at the ones at pelican. I don't understand how the barrel nut versions work using a hex drive.
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mepstein
post Jan 19 2018, 02:24 PM
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Threaded on one end, hex drive on other end. I don't think the exhaust studs have enough clearance around them to fit the barrel nuts. I use the 12mm copper colored nuts on a 914. Gives you more room to work than a 13mm.
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914Sixer
post Jan 19 2018, 04:56 PM
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I just put some side by side. Diameter is the same because the 914 has a flange and the 911 does not. Also the 911 would be easier to tighten because no socket required. Problem I am seeing is the 911 nuts is they spin up freely and probably will come off just as quick. The factory 914 nut has a coil inside that grabs the stud.
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Amphicar770
post Jan 19 2018, 05:14 PM
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I tried the 911 nuts and yes, they came loose. Went back to or original style.
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iankarr
post Jan 19 2018, 05:52 PM
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I also tried the barrel nuts. Needed washers to space them off the flange and, yes...they came loose.
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gereed75
post Jan 19 2018, 09:08 PM
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You guys are scaring me. I used the barrel nuts. Can’t remember but I want to say I use split locks on them?? With the stock HE’s there is one stud where you can’t get the socket on there. That one got a nut.

Thought it was an “upgrade”. Hope the stay tight!
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mepstein
post Jan 19 2018, 09:17 PM
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QUOTE(gereed75 @ Jan 19 2018, 10:08 PM) *

You guys are scaring me. I used the barrel nuts. Can’t remember but I want to say I use split locks on them?? With the stock HE’s there is one stud where you can’t get the socket on there. That one got a nut.

Thought it was an “upgrade”. Hope the stay tight!

I used barrel nuts on my MB911 heat exchangers, except the one that needs a regular nut. Barrel nuts are standard on many 911 heat exchangers and used on 914-6 HE's. That's why Ben duplicated the access tubes on his product.
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toolguy
post Jan 19 2018, 09:46 PM
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The barrel nuts [ with allen heads] are used on 911 and 914-6 to get thru the holes in the heat exchanger. . If you have to use washers, the studs are too long. . The 12 mm copper nuts are used on the other studs because of limited wrench clearance between exhaust header and outside of wrench. . the front nut on the passenger side of a 914'6 is a real bitch. . you can see it and almost touch it. . I have a special bent up wrench just for that one stud. .
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mepstein
post Jan 19 2018, 10:04 PM
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We call it an SSI wrench but real name is distributor wrench.


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Larmo63
post Jan 19 2018, 10:34 PM
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I used the 12mm nuts, I've checked and re-checked them, no exhaust leaks ever.
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914Sixer
post Jan 20 2018, 07:29 AM
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I think I have found some replacements for the NLA factory nuts. I ordered some. Not cheap but better than the $18 each for the factory nuts. Made of titanium with locking threads.


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mepstein
post Jan 20 2018, 07:36 AM
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QUOTE(914Sixer @ Jan 20 2018, 08:29 AM) *

I think I have found some replacements for the NLA factory nuts. I ordered some. Not cheap but better than the $18 each for the factory nuts. Made of titanium with locking threads.

They look great
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bdstone914
post Jan 20 2018, 07:36 AM
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QUOTE(914Sixer @ Jan 20 2018, 07:29 AM) *

I think I have found some replacements for the NLA factory nuts. I ordered some. Not cheap but better than the $18 each for the factory nuts. Made of titanium with locking threads.


How costly are those made out of titanium ?

How about these ?
https://www.mcmaster.com/#95108a102/=1b7iz3e

$9.00/100

I bought a bunch of these SS flanged nuts that might be an option on heat exchangers

Bruce


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rhodyguy
post Jan 20 2018, 08:34 AM
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Being stainless, do you think there might be an issue with the steel studs? I tried using SS hardware on the muffler to heat exchanger connection one time. Didn't work out so well. Perhaps the black phosphate ones might be better suited for this application?
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mepstein
post Jan 20 2018, 08:49 AM
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I like the height of the ti bolts. Theres a lot of bolt to grab on to.
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CMONNETT
post Jan 20 2018, 09:30 AM
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QUOTE(914Sixer @ Jan 20 2018, 07:29 AM) *

I think I have found some replacements for the NLA factory nuts. I ordered some. Not cheap but better than the $18 each for the factory nuts. Made of titanium with locking threads.

Do you have a link for where you found these?
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914Sixer
post Jan 20 2018, 09:50 AM
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EBAY 161892735045 3 to bag. 10.99 shipped
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rhodyguy
post Jan 20 2018, 09:54 AM
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eBay link doesn't open on the tablet. It wants to dial that #. I'll look it up manually.

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