Nut in hole in Exhaust manifold

ronfikus 1

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This is in the exhaust manifold hole What socket fits in there? Or is there a special tool I got this one that's being a pain

Manifold casting # 3671595-2
1972 Charger SE 400 engine

20221114_235945630_iOS.jpg
 

Dave6T4

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These deep holes on HP exhaust manifolds require a special long shouldered nut to fasten them to the cylinder head. It looks like a PO did not have this, and devised some other way to do it. The picture is not clear enough for me to figure out what is going on.
 

ronfikus 1

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These deep holes on HP exhaust manifolds require a special long shouldered nut to fasten them to the cylinder head. It looks like a PO did not have this, and devised some other way to do it. The picture is not clear enough for me to figure out what is going on.
Yea I had all bolts but this last one I took this pic with a scope but you can clearly see the nut holding it on. I'm disassembling and cleaning as this car sat for 22 years
 

1 Wild R/T

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These deep holes on HP exhaust manifolds require a special long shouldered nut to fasten them to the cylinder head. It looks like a PO did not have this, and devised some other way to do it. The picture is not clear enough for me to figure out what is going on.
Looks like there's a socket head bolt in the hole....

m6-10x12-allen-bolt.jpg
 

Dave6T4

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Yeah, I kinda had that thought too. Looked at it again after your post, and agree. Not the right way to do it, but I can see how it could work, if one did not have the correct pieces.
 

ronfikus 1

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Yeah, I kinda had that thought too. Looked at it again after your post, and agree. Not the right way to do it, but I can see how it could work, if one did not have the correct pieces.
Yea well I'm going to keep the manifolds after watching that dyno clip and I can assure you guys I will have the correct hardware thanks a million
 

Dave6T4

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The correct nuts can be bought through Mopar restoration parts places like Year One, Classic Industries, etc. They come in two lengths, depending on application.
 

69Bee

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AMK Bolts... Bulk Fasteners

CHRYSLER - Engine - 396/454C-8063EXHAUST MANIFOLDS - 383/440STUDS, 3 SHORT & 2 L SLEEVE NUTS24$72
CHRYSLER - Engine - 396/454C-8065EXHAUST MANIFOLDS - 383/440STUDS, 1 SHORT & 2 L SLEEVE NUTS24$55
 

ronfikus 1

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AMK Bolts... Bulk Fasteners

CHRYSLER - Engine - 396/454C-8063EXHAUST MANIFOLDS - 383/440STUDS, 3 SHORT & 2 L SLEEVE NUTS24$72
CHRYSLER - Engine - 396/454C-8065EXHAUST MANIFOLDS - 383/440STUDS, 1 SHORT & 2 L SLEEVE NUTS24$55
Notice it never mentions 400 motor I just got off the phone with Classic and they said they have no listing for a 400 Exhaust Manifold Fastners I orderd MN1501 and going to see if that works.
 

69Bee

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Umm, 383 & 400 are the same... The bolt kits fit all big blocks, are USA made, proper finish, correct lengths and factory head markings.
 
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