Nutserts on core support? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

djohnson · 02-19-2007, 05:24 PM

Can anyone tell me where to find "nutserts" like the factory used on the core support where the upper radiator support mounts (This is on a 78 K5)? How about a procedure for replacing them?

bigblock73 · 02-19-2007, 06:29 PM

Typically there are capture nuts on the bottom side of the core support, and the upper radiator mounts screw into them. On my truck, which was originally small block powered, I had the small radiator and the capture nuts were on the core support on the inside of the engine compartment. Now that I have switched to a big block, I had to mount the BB mount to the topside of the core support...the problem, there are no capture nuts there! To solve my issue, I used well (expansion) nuts and mounted it that way. Not quite factory, but works perfect and doesn't require I weld nuts to the underside of my already painted, assembled, and installed core support. If you need a picture, I can snap one later tonight. Hope this is what you were looking for.

dswancutt · 02-19-2007, 10:06 PM

They are still available from GM. Part Number 3792287.

djohnson · 02-19-2007, 10:13 PM

Great! Thanks for the information.

Anyone know how to install them without the special tool?

bigblock73 · 02-19-2007, 10:18 PM

Anyone have a picture of a "nutsert"?

dswancutt · 02-20-2007, 01:28 AM

I need some for my project. I will try the dealer in Kearney Neb and see if by some odd chance, they have some in stock. Most likely I will have to go to Sutton Neb to pick them up. I used some on my doors for the mirrors, and all that I did was hold them as I started the bolt, and once they had flared enough behind the panel to grab, they tightened right up. I am not sure if these work the same way.

bigblock73 · 02-20-2007, 07:28 AM

GMpartsdirect has them, about $2 a piece. Can you get a pic once you get them?

dswancutt · 02-20-2007, 11:37 AM

If they don't have them at the Kearney dealership, it might be a week or so. But I will shoot some pics one I have them.

Restrorob · 02-20-2007, 01:08 PM

Quote:

Originally Posted by dswancutt

But I will shoot some pics one I have them.

Great, I'd like to see them also...

dswancutt · 02-23-2007, 11:35 AM

Sorry guys, struck out on the nutserts this week. Will let you know when I get them

02-19-2007, 05:24 PM	#1
djohnson Registered User Join Date: Jan 2005 Location: Wylie, TX Posts: 41	Nutserts on core support? Can anyone tell me where to find "nutserts" like the factory used on the core support where the upper radiator support mounts (This is on a 78 K5)? How about a procedure for replacing them?

02-19-2007, 06:29 PM	#2
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: Nutserts on core support? Typically there are capture nuts on the bottom side of the core support, and the upper radiator mounts screw into them. On my truck, which was originally small block powered, I had the small radiator and the capture nuts were on the core support on the inside of the engine compartment. Now that I have switched to a big block, I had to mount the BB mount to the topside of the core support...the problem, there are no capture nuts there! To solve my issue, I used well (expansion) nuts and mounted it that way. Not quite factory, but works perfect and doesn't require I weld nuts to the underside of my already painted, assembled, and installed core support. If you need a picture, I can snap one later tonight. Hope this is what you were looking for. __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

02-19-2007, 10:06 PM	#3
dswancutt Registered User Join Date: Jul 2003 Location: Franklin, NE Posts: 387	Re: Nutserts on core support? They are still available from GM. Part Number 3792287.

02-19-2007, 10:13 PM	#4
djohnson Registered User Join Date: Jan 2005 Location: Wylie, TX Posts: 41	Re: Nutserts on core support? Great! Thanks for the information. Anyone know how to install them without the special tool?

02-19-2007, 10:18 PM	#5
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: Nutserts on core support? Anyone have a picture of a "nutsert"? __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

02-20-2007, 01:28 AM	#6
dswancutt Registered User Join Date: Jul 2003 Location: Franklin, NE Posts: 387	Re: Nutserts on core support? I need some for my project. I will try the dealer in Kearney Neb and see if by some odd chance, they have some in stock. Most likely I will have to go to Sutton Neb to pick them up. I used some on my doors for the mirrors, and all that I did was hold them as I started the bolt, and once they had flared enough behind the panel to grab, they tightened right up. I am not sure if these work the same way. Last edited by dswancutt; 02-20-2007 at 01:30 AM.

02-20-2007, 07:28 AM	#7
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: Nutserts on core support? GMpartsdirect has them, about $2 a piece. Can you get a pic once you get them? __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

02-20-2007, 11:37 AM	#8
dswancutt Registered User Join Date: Jul 2003 Location: Franklin, NE Posts: 387	Re: Nutserts on core support? If they don't have them at the Kearney dealership, it might be a week or so. But I will shoot some pics one I have them.

02-23-2007, 11:35 AM	#10
dswancutt Registered User Join Date: Jul 2003 Location: Franklin, NE Posts: 387	Re: Nutserts on core support? Sorry guys, struck out on the nutserts this week. Will let you know when I get them



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