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Join Date: Jun 2015
Location: Seattle or LA
Posts: 724
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Case perimeter stud installation
How can I determine if I have the correct stud for installing into the case perimeter of my 1978 SC case.
One is missing and Im hoping to be sure I have a correct replacement. Does anyone know the measurements of the stud? I know its an M8 x 1.25, but not sure of the total length, and where does the non-threaded portion need to sit?
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-14-2016, 04:30 PM
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I have several boards with stud length and location but I have made them as visual templates.
Photo of location and engine code and I can give you a length. Note: most upper and lower studs are the same length. -
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1973 Porsche 911 RS 1981 Porsche 931 Euro-Intercooled-GT 1984 Porsche 911 Euro Carrera widebody 1987 Porsche 924s Rallye Spec Instagram: @soyracer |
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02-14-2016, 04:40 PM
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Join Date: Mar 2004
Location: Windsor, CT
Posts: 2,119
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My 3.0 SC Perimeter Fasteners.
Of the (22) locations on the perimeter, how many/which one are missing studs?
Per the picture WHITE: (19) studs on RHS, YELLOW: (2) studs mounted on LHS RED: (1) bolt near the bottom front of the engine. 
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Mike '82 911SC, SSI, 22/29 tbars, 22F/22R Adj swaybars, Bilstein Sport, Elephant polybronze & monoballs, Cambermeister bar, turbo tierods, Carrera oil cooler, front brake cooling ducts, Sparco Sprint 5 & Recaro SRD PAX seat, Teamtech harness, DAS Sport rollbar. |
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02-14-2016, 04:53 PM
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nice chart!
Im missing the stud for #6 in your picture. Im also missing the bolt #17. Specs on both, with be great!
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-14-2016, 05:50 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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The #6 stud is one of thirteen that are M8x32. 32mm is the overall length, not length sticking out after it's installed. I have a bunch of junk camshaft housings that i've pulled the studs from. The lower valve cover studs are M8x35 and I have a bunch of them if you would like me to send one or a few or however many you want. No charge.
The #17 bolt is nothing special M8x45 length and a common 8.8 property class/strength. This should be easy to get at your local hardware store. I've found that Ace Hardware stores have a pretty good selection of basic metric bolts like these.
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Kevin L '86 Carrera "Larry" |
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02-15-2016, 06:09 AM
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Quote:
Im going to measure some studs I found around the shop. Can I use Loctite 574 to install them?
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-15-2016, 11:59 AM
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Quote:
I found a stud for #6 that's about the right fit. and some Permatex red high strength thread locker. 
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-15-2016, 03:04 PM
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test fit shows my stud is too short?
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-15-2016, 03:14 PM
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Join Date: Oct 2008
Location: Nash County, NC.
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You have a full nut, you're not going to get any more hold. The only one that needs to be longer is the ground wire attaches on #4.
Bruce |
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02-15-2016, 04:18 PM
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Quote:
anyone got an extra?
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-15-2016, 04:31 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Sorry I got my measurements incorrect about overall length vs. operable length. Red loctite isn't necessary but it's not going to hurt anything. All of the studs are held in place with a low strength threadlocker that doesn't require heat or a ton of effort to remove the studs.
Just make your own ground wire (if you no longer have yours) with a thick gauge wire and some crimp on eyelets. Then you can make the ground wire go to whichever stud works for you.
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Kevin L '86 Carrera "Larry" |
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02-16-2016, 11:58 AM
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Location: S. Florida
Posts: 7,249
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Use high quality marine grade wire and eyelets crimped on the ends if you can. The quality is way better than generic auto parts stuff.
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02-16-2016, 03:22 PM
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Quote:
that's exactly what I got! and it even matches my fan and calipers  
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1971 911T (Tangerine) 1973 911T (Light Yellow) 1978 911SC -- "Northy" 3.2 twin plug 1990 911 Carrera 2 |
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02-16-2016, 05:56 PM
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Q-P
Flat Out
