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Atoms' Gremlins again- [message #310804] Wed, 23 November 2016 14:52 Go to next message
Atom Ant is currently offline  Atom Ant   United States
Messages: 170
Registered: October 2016
Location: Austin, TX
Karma: 0
Senior Member
Hey all-

did a good 6 hours of wiring yesterday. coach started right up, so I think we're good!

at least for now-

because I keep finding these things

can someone help me with this little prize?

http://i66.photobucket.com/albums/h252/adammetzger/WTF1.jpg

http://i66.photobucket.com/albums/h252/adammetzger/WTF1.jpg

this is black wire stripped at end, green wire with male bullet type connection passing through stripped black wire end, then taped.

http://i66.photobucket.com/albums/h252/adammetzger/wtf2.jpg

http://i66.photobucket.com/albums/h252/adammetzger/wtf2.jpg

as I pulled on it to see where it ended, this came up from. It was simply dangling down the side of the valve cover.
It obviously has a plug, but any ideas where it goes? to a ground no doubt. does anyone recognize the black harness assembly? it looks to come from the compressor?

I spent a good amount if time opening looms to inspect yesterday. There is a loom into the engine area at the top front right of the engine, looking down from the top. it splits across the top of the engine to the left, going to the alternator, and another bundle of wires goes to the rear, along the right top of the engine, near the right valve cover.

one of these looms was in really bad shape, like it had melted from either engine heat or fire.

http://i66.photobucket.com/albums/h252/adammetzger/wtf3.jpg

http://i66.photobucket.com/albums/h252/adammetzger/wtf3.jpg

could straight engine heat do this? the wires inside seemed okay, if not a bit worse for the wear-

http://i66.photobucket.com/albums/h252/adammetzger/wtf4.jpg

http://i66.photobucket.com/albums/h252/adammetzger/wtf4.jpg

I replaced all the loom in the engine compartment, and will keep an eye on it.








1976 Palm Beach Austin, TX

[Updated on: Wed, 23 November 2016 14:54]

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Re: Atoms' Gremlins again- [message #310805 is a reply to message #310804] Wed, 23 November 2016 15:21 Go to previous messageGo to next message
C Boyd is currently offline  C Boyd   United States
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Registered: April 2006
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Sir, it looks like po has changed AC compressor to Sanden. The dangling plug is to oem compressor. New connector scabbed in to it?

C. Boyd
76 Crestmont
East Tennessee

[Updated on: Wed, 23 November 2016 15:21]

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Re: Atoms' Gremlins again- [message #310806 is a reply to message #310804] Wed, 23 November 2016 15:21 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Registered: March 2007
Location: S.E. Michigan
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Good Hunting Adam,

I think you win the incompetent PO of the year award here. Maybe the Decade....

That loose connector does look the one that goes to the A/C clutch. That one does ground nearby in my '73.

The melted loom was heated from the outside. If it was on top of the engine, in the valley, there is the heater (cross over) there and the hot part of the choke system that are all good suspects.

Keep at it, it will turn out to be worthwhile.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: Atoms' Gremlins again- [message #310807 is a reply to message #310804] Wed, 23 November 2016 15:24 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Mexico
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Registered: June 2008
Location: S. Ontario, Canada
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I can't see exactly where along the top of the engine your loom and wires are cooked and melted. I wondering if it was close to the choke stove. The crossover exhaust gases get the intake manifold hot enough to burn the paint off the intake and even crack it. If it is by the choke stove, check the gasket there to be sure it is not leaking exhaust gases.


Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: Atoms' Gremlins again- [message #310815 is a reply to message #310804] Wed, 23 November 2016 16:36 Go to previous messageGo to next message
Atom Ant is currently offline  Atom Ant   United States
Messages: 170
Registered: October 2016
Location: Austin, TX
Karma: 0
Senior Member
Thanks, Y'all. I'll look into the choke pipe.

birds eye view of the engine compartment, this loom runs down the right side of the engine, on top, between the carb and the valve cover on the right.

is there a engine schematic that describes pipes, tubes and lines the way the electrical schematic does? I'd loove to have a better idea of what I'm looking at.

I'm gonna get good at this, dammit.


1976 Palm Beach Austin, TX
Re: Atoms' Gremlins again- [message #310880 is a reply to message #310815] Thu, 24 November 2016 16:31 Go to previous message
Ken Burton is currently offline  Ken Burton   United States
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Location: Hebron, Indiana
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Get that loom up off of the intake manifold. Especially right where the loom goes by the carb. There is a very hot exhaust crossover that goes under the carb. It gets hot enough at times to burn the paint off of the intake and will definitely melt the wire loom if it touches the intake in that area. Use a couple of cable clamps mounted by the valve cover bolts to raise that loom up off of the intake in that area.

Checking the stove pipe gasket, as previously suggested here, is also a good recommendation. That blown gasket is what started my engine fire 7 years ago.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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