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Join Date: Jul 2013
Posts: 1,104
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Copper header nuts?
I recently bought some copper M8 locking nuts for my PMO install and thought they might be a good solution for my SSI units. Looks like the M10 hex head allows use on all of the studs so one can ditch the barrel nuts. Anyone have experience with these? I know that my e46 M3 had copper nuts.
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03-31-2016, 02:56 AM
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They work great. I still use anti-seize with them just to make sure.
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03-31-2016, 03:20 AM
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Works great on the exhaust.
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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03-31-2016, 07:42 AM
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Join Date: Aug 2010
Location: Küsten, Germany
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I am using them since 20 years on a big number of engines made. Never had any issues.
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03-31-2016, 11:06 AM
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Put them on my SSI's......no problems.
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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03-31-2016, 11:20 AM
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Thanks folks! Installing tonight!
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03-31-2016, 12:05 PM
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Work good. I don't use any anti seize. They still come off when you want them too, and stay put when you want them too.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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03-31-2016, 01:10 PM
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yeah I think anti seize in this particular application is like dropping an ice cube into a volcano. I use copper also , never considered replacing the barrel nuts with them though , nice idea , and a lot cheaper.
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1976 Yamaha XS360 ( Beats Walkin') 1978 911 SC Targa ( Yamaha Support Vehicle ) 2006 Audi A4 2.0T (Porsche Support Vehicle ) 2014 Audi A4 2.0T Technik (Audi Support Vehicle) |
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04-01-2016, 07:33 AM
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"yeah I think anti seize in this particular application is like dropping an ice cube into a volcano."
Not true, a good nickel anti-seize makes a huge difference in preventing corrosion on any exhaust fasteners. A high purity nickel anti-seize is good to 2400 F. I've been using it for decades and it works. But you have to get the industrial quality stuff. A higher grade fastener also has more corrosion resistance because it has some nickel and chrome in it. |
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04-01-2016, 09:12 AM
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Location: Loxahatchee, florida
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I use them with Loctite n-7000. thread lube. always come back off fine and never get loose. same with turbo flange nuts.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 2019 Silverado 6.2L |
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04-20-2016, 04:20 AM
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Regardless, the studs are steel. They want to rust. They're in a nasty environment (heat, moisture, road debris).
For long term confidence, consider installing SS acorn nuts filled with anti-seize to protect the exposed end of each stud (fitment not yet confirmed).  McMaster-Carr Use whatever there is to reduce corrosion in this area. Nickel-based AS is as good as any. YMMV. Sherwood |
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04-20-2016, 07:32 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
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They're really copper coated steel, don't use Stainless Steel.
SS is soft and it will gall when you try to remove them Milk of Magnesia is a good anti-seize, IIRC it's what the air force uses on jet engines.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. |
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04-20-2016, 07:42 AM
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Join Date: May 2005
Location: Loxahatchee, florida
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yes copper coated steel not actually solid copper
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 2019 Silverado 6.2L |
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04-20-2016, 08:04 AM
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Quote:
While Milk of Magnesia (magnesium hydroxide) might be a good anti-seize; supposedly dries to a fine powder, how does it stand up to protecting exposed threads and the elements (water)? I suspect it'll work as designed when captured between two threaded fasteners. And then some sources say that Nickel-based anti-seize contains heavy toxic metals; may react with aluminum, and to thus use Copper-based AS. A couple of discussions here: Milk of Magnesia for my exhaust ring bolts. : Norton Commando Classic Motorcycles Unusual anti-seize compound | Industrial- Other / Off Topic | Bob Is The Oil Guy Sherwood |
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04-20-2016, 01:16 PM
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1977 Porsche 911 Targa 2.7s
1979 Porsche 911SC
