Plugging firewall holes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MASTERBrian · 02-23-2017, 06:32 PM

I have about 20 holes of various sizes in my firewall. I've looked at two local parts stores, a Lowes, and an Ace Hardware for rubber grommets/hole plugs. I know they make what I want/need as I am sure I've purchased them years ago for my cars. Amazon seems to be my best bet for buying a bulk and hope that what I get might work. I'm curious if there are any other great ideas out there.

I've thought of welding a few of them shut, I've also seen where another member uses JB Weld and coins to plug holes. Problem is I'm not sure if I'll want any of those for later use, when running additional wiring.

There are also two identical holes right where the tranny tunnel starts going back, they are about 5/8" and the metal is flared out....any idea what these are? I can post pic later if need be.

James the III · 02-23-2017, 07:45 PM

http://www.mcmaster.com

granger (sp?)

http://www.boltdepot.com/catalog.asp...FRCe4AodmlYAnQ

tinydb84 · 02-23-2017, 08:05 PM

Why not weld them up? You can always drill a new one later.

bs46488 · 02-24-2017, 02:43 PM

I bought a bunch of rubber plugs off of ebay in various sizes.

I had a bunch of holes in my floor from the previous owner. I didn't want to weld them all up.

blazer2007 · 02-25-2017, 10:07 AM

weld a bolt to a piece of metal of the size you want with a little rubber gasket and then you could take it out,could paint the piece matching color

02-23-2017, 06:32 PM	#1
MASTERBrian Registered User Join Date: Jan 2017 Location: Wichita Posts: 639	Plugging firewall holes I have about 20 holes of various sizes in my firewall. I've looked at two local parts stores, a Lowes, and an Ace Hardware for rubber grommets/hole plugs. I know they make what I want/need as I am sure I've purchased them years ago for my cars. Amazon seems to be my best bet for buying a bulk and hope that what I get might work. I'm curious if there are any other great ideas out there. I've thought of welding a few of them shut, I've also seen where another member uses JB Weld and coins to plug holes. Problem is I'm not sure if I'll want any of those for later use, when running additional wiring. There are also two identical holes right where the tranny tunnel starts going back, they are about 5/8" and the metal is flared out....any idea what these are? I can post pic later if need be.

02-23-2017, 07:45 PM	#2
James the III Registered User Join Date: Nov 2016 Location: lowell ma Posts: 750	Re: Plugging firewall holes http://www.mcmaster.com granger (sp?) http://www.boltdepot.com/catalog.asp...FRCe4AodmlYAnQ

02-23-2017, 08:05 PM	#3
tinydb84 Registered User Join Date: Jul 2009 Location: San Jose Ca Posts: 2,871	Re: Plugging firewall holes Why not weld them up? You can always drill a new one later. __________________ David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy

02-24-2017, 02:43 PM	#4
bs46488 Registered User Join Date: May 2014 Location: San Diego, CA Posts: 547	Re: Plugging firewall holes I bought a bunch of rubber plugs off of ebay in various sizes. I had a bunch of holes in my floor from the previous owner. I didn't want to weld them all up. __________________ Project Engine Stand 1972 SWB conversion: http://67-72chevytrucks.com/vboard/s...d.php?t=673914 1970 Nova: http://67-72chevytrucks.com/vboard/s...d.php?t=708161

02-25-2017, 10:07 AM	#5
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	Re: Plugging firewall holes weld a bolt to a piece of metal of the size you want with a little rubber gasket and then you could take it out,could paint the piece matching color



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