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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: ScottSmith_Harms]
#1090987
11/14/13 05:49 AM
11/14/13 05:49 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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Warning! Don't accuse me of being totally anal and long winded, but I have inventoried every single attribute of every single fastener on my car, so I can get them batch restored and get them each back where they belong. On my 69 340, both coil mount bolts are 5/16-18 x 5/8 with 5/8 OD captive conical washer, grade 5.1. One has head marking of 3 dots and is S2 finish, phosphate and oil. The other has head marking GL and is S36 finish, zinc dichromate, yellow-rainbow. These are the same as the photo of part B-12548, "Chrysler Auto Trans Pan", on page 101 except for the head markings and S36 finish here: http://www.amkproducts.com/Catalog_PDF/92-108.pdfThe GL head marking is shown on the inside front cover, and the grade 5.1 head marking is shown on page 2 here: http://www.amkproducts.com/Catalog_PDF/FC-5.pdfSorry to say I did not take note of which bolt went in which hole, but I could have switched the bolts years ago anyway. Scott, tell me which bolt goes where, and I'll take photos as soon as I can get back to my Mopar man cave.
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: kentj340]
#1090988
11/14/13 11:01 AM
11/14/13 11:01 AM
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Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms
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Mr Wizzard
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Mr Wizzard
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Posts: 42,714
Spokane Washington
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Quote:
Warning! Don't accuse me of being totally anal and long winded
No worries on this thread! I have seen examples of the black and plated bolts on both front and rear positions. As in your case I expect the possibility of them being swapped at one time or another is possible. It seems that the bright plated bolt in the rear position has been most common in my observation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: ScottSmith_Harms]
#1090991
11/15/13 03:16 AM
11/15/13 03:16 AM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
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master
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IL, Aurora
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Quote:
Another odd 1971 only 340 detail. I was going through some of my used production line 1971 340 parts and came across this carburetor gasket (used under all 4972s and 4973s Thermo-Quads). It is pretty well known that these used a unique carb gasket combo; two foil/asbestos gaskets which sandwiched a thicker aluminum spacer plate/ The combo raised the carb up about 1/4" above the intake and the materials likely added some decent insulating properties.
What I wanted to call out on this post is a small easily overlooked detail of these gaskets. The 3 pieces were STAPLED together! That's right, the staples go through both the asbestos gaskets AND the thick solid aluminum plate! Pretty impressive staple power there! One staple in the front, one staple in the rear, likely to keep them as a set and for ease of assembly during production. I have never seen this on anything but production line examples.
i'll have to dig out my plate to see if there are any holes !!
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: ScottSmith_Harms]
#1090993
11/18/13 02:24 AM
11/18/13 02:24 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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Quote:
Can anyone post good pics of 100% confirmed original 340 coil mount bolts? Looking for head markings and plating colors. Front and rear bolts may have been unique.
Glad you asked, because as I was getting ready to make photos, I discovered a few nifty factoids.
1. I posted in error above that one bolt had maker’s mark “GL” on the head. After looking more carefully at the actual bolt rather than my fastener spreadsheet, I now see that the maker’s mark is actually “E”. “E” maker’s mark is also found on the inside front cover here:
http://www.amkproducts.com/Catalog_PDF/FC-5.pdf
along with a list of finish codes, like S36 Zinc Dichromate (yellow - rainbow) on page 4.
2. The exact same bolt with maker’s mark “E” was used on the rear of my 69 340 R head for the head-to-firewall ground wire.
3. I think there are only three bolts 5/16-18 x 5/8 on my 69 Barracuda, the two on the coil mount and the one on the R head. Each is pictured below.
4. I say “I think” in factoid 3 above, because now I am on a mission to find the battery ground cable-to-L head, which is S36 finish and has engine blue paint on it. It may also be 5/16-18 x 5/8? This was one of the first bolts I removed in my restoration quest, and it may be (hopefully) the only one not found so far in my spreadsheet. Isn’t this fun?
BTW, my theory on why some S36 fasteners were found on the engine: these were specified for best electrical conductivity as in the case of the coil mount and the battery ground cable. The intake manifold had S36 bolts because the coil is mounted on it, but meantime the intake manifold has a gasket under it that is non-conductive.
Here is the coil mount bolt with maker’s mark “E” and with S36 zinc dichromate (yellow – rainbow) finish. The original dichromate is not visible because I have cleaned it for re-plating and re-chromating. This engine bolt was NOT painted engine blue; i.e., the coil was added after the painting.
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: kentj340]
#1090994
11/18/13 02:27 AM
11/18/13 02:27 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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Here’s the exact same bolt that came from the rear of the R head and held the firewall ground wire. This bolt was painted engine blue.
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: kentj340]
#1090995
11/18/13 02:29 AM
11/18/13 02:29 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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Here’s the “3-dot” maker’s mark from the coil mount that is S2 phosphate and oil finish. This bolt has been degreased but not cleaned for re-phosphating.
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: kentj340]
#1090997
11/18/13 02:32 AM
11/18/13 02:32 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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This photo clearly shows the S36 zinc dichromate (yellow – rainbow) finish on the bottom of the blue head bolt.
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: ScottSmith_Harms]
#1090998
11/18/13 02:56 AM
11/18/13 02:56 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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No, sorry, I did not record which hole in the coil mount that the S2 bolt came out of. Those bolts were also some of the first removed from the car when I didn't know I needed to be as anal as I am now.
Yes, the manifold-to-head bolts on my blue engine are also maker's mark "E", but they were a size bigger than the coil mount, namely 3/8-16 x 1-5/8. I'll try to post a photo later.
One of my manifold bolts broke off, so the manifold is still stuck to a head. I think it was real close to the exhaust passage - I suppose the heat made it stick. Last time I looked at it, I'm guessing the manifold was factory drilled from the backside, because there is no straight shot to the hole with the carb riser in the way. Its going to be tough to drill out...
If you don't see two dolphins, you need a vacation.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: ScottSmith_Harms]
#1091001
11/18/13 05:16 PM
11/18/13 05:16 PM
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Joined: Jul 2003
Posts: 3,267
Connecticut
1972CudaV21
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Connecticut
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Quote:
Yes I've seen those as well (the "23" bolts) just never on an original 340  Careful consideration needs to be given when talking about different years because hardware and assembly methods varied a lot (even within the same year) especially in 1971 when the engine plant changed fro Windsor to Mound Road (when the engines went from Orange to Blue paint). Ill be posting more pics of various bolts Ive found on my 71 survivor engine this week.
Oh, so moving the production to Mound Road was when the color changed? What date was that? My car was built 10/71. Yet, the casting date on my 340(original block)is 1/71.
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Re: Warning! Totally Anal Long Winded O.E. 340 Thread!
[Re: bremotorsports]
#1091005
11/30/13 03:00 AM
11/30/13 03:00 AM
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Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
kentj340
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Anybody know what was the original bolt head for a 69 turquoise 340 left head-to-neg batt cable? I know it was 5/16-18, S36 zinc dichromate yellow-rainbow finish, but I don't know the length, washer details, nor maker's mark.
Could it have been identical to the S36 "E" bolt above?
If you don't see two dolphins, you need a vacation.
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