Carb Welch Plug leak on 1972 GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kamby · 05-26-2009, 04:51 PM

Hello,

I have a 1972 GMC Pickup, its got a 2 barrel carb with the fuel filter in the carb. One day i was driving home and smelt fuel at idle. I opened the hood and noticed some seeping out of the welch plug on the carb right where the fuel line and filter enter into the carb. Is this something easy to fix or do i have to replace/rebuild the carb? If need be i can get a picture taken.

It has the sb 350 and probably the quadrajunk or rochester on it.

Thanks

Jason

**425HP409** · 05-26-2009, 06:06 PM

You need to clean off the plug, scuff it up a little bit, and then apply some two part epoxy like JB Weld to it. Cover the plug and the surrounding carburetor area with the epoxy. If done correctly, it will never leak again.
Charles

kamby · 05-26-2009, 07:01 PM

Thanks for the reply, and tip. I'll probably do that. I wanna put a new carb on this thing just not right now. Wont the gas eat the jb weld stuff.

Jason

Bus Ted Knuckle · 05-26-2009, 07:23 PM

tap it gently with a ball peen hammer...GENTLY! It will flatten the solder and stop the leak, and you won't have a wad of pucky on the front of your carb.

05-26-2009, 04:51 PM	#1
kamby Registered User Join Date: Jan 2009 Location: Puyallup, WA Posts: 13	Carb Welch Plug leak on 1972 GMC Hello, I have a 1972 GMC Pickup, its got a 2 barrel carb with the fuel filter in the carb. One day i was driving home and smelt fuel at idle. I opened the hood and noticed some seeping out of the welch plug on the carb right where the fuel line and filter enter into the carb. Is this something easy to fix or do i have to replace/rebuild the carb? If need be i can get a picture taken. It has the sb 350 and probably the quadrajunk or rochester on it. Thanks Jason __________________ Give a man a fish and he will eat for a day, teach a man to fish and he will spend all day in his boat fishing and drinking beer. Last edited by kamby; 05-26-2009 at 04:54 PM.

05-26-2009, 06:06 PM	#2
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 835	Re: Carb Welch Plug leak on 1972 GMC You need to clean off the plug, scuff it up a little bit, and then apply some two part epoxy like JB Weld to it. Cover the plug and the surrounding carburetor area with the epoxy. If done correctly, it will never leak again. Charles

05-26-2009, 07:01 PM	#3
kamby Registered User Join Date: Jan 2009 Location: Puyallup, WA Posts: 13	Re: Carb Welch Plug leak on 1972 GMC Thanks for the reply, and tip. I'll probably do that. I wanna put a new carb on this thing just not right now. Wont the gas eat the jb weld stuff. Jason __________________ Give a man a fish and he will eat for a day, teach a man to fish and he will spend all day in his boat fishing and drinking beer.

05-26-2009, 07:23 PM	#4
Bus Ted Knuckle Son of a gun Join Date: Jan 2007 Location: Hot Springs, Arkansas Posts: 1,636	Re: Carb Welch Plug leak on 1972 GMC tap it gently with a ball peen hammer...GENTLY! It will flatten the solder and stop the leak, and you won't have a wad of pucky on the front of your carb. __________________ Bill BEATERS ARE NEATER



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