Need help with gas leaking from inlet - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jayoldschool** · 06-20-2017, 12:37 PM

Finally rebuilt my carb to remedy my non-functioning accelerator pump. Previously, I had sealed up the threads on the filter fitting with teflon tape to get it to stop leaking. I didn't have the fitting gasket. My rebuild kit didn't come with one, but I grabbed one from another kit. It leaks, a lot. I even tried an AC o ring with no luck.

I don't have the spring for behind the filter, or the little gasket that goes in front of the filter inside the fitting. Should I just go ahead and reseal it with teflon? I know teflon is not a great choice on those threads, but I can't think of anything else to seal it up.

geezer#99 · 06-20-2017, 03:15 PM

If you're talking quadrajet, then look here for a self tapping replacement. They cut new threads that seals up the inlet.
Just measure yours to get the right one.
https://quadrajetparts.com/quadrajet...c6c74d5886ba5e

**jayoldschool** · 06-20-2017, 06:39 PM

Guess I should have been more specific and it might not have been moved from 60-66. It is a 65 230 with a model B single barrel.

I pulled the filter, did a thicker wrap of teflon and got the drip to stop. Tomorrow, I'll put an inline filter between the pump and carb. I wonder if the thread sealer that goes on head bolts would be a better choice than the teflon? I'm tempted to just JB Weld it in there...

geezer#99 · 06-20-2017, 07:11 PM

Dig deeper!
Maybe an extended thread one would work.
https://quadrajetparts.com/inlet-fit...c6c74d5886ba5e

**jayoldschool** · 06-20-2017, 07:36 PM

I went digging through my parts. I still have the complete intake/carb from a 71 350. It's a 2GC, so I'm bringing that fitting with me tomorrow to check to see if it works and seals. I checked my thread sealer tube, it's ok for fuel, so might try that, too!

68gmsee · 06-20-2017, 07:58 PM

Teflon or thread sealers won't work. Gasoline eats right though them and will only seal temporarily. Best thing to do is to see if you can get a tap as mentioned above or maybe find another used single barrel like yours for parts. One person you can call to see if they have anything to fix the problem is Mike's Carburetor Parts.

06-20-2017, 12:37 PM	#1
jayoldschool Moderator Join Date: Dec 2012 Location: ON, Canada Posts: 2,176	Need help with gas leaking from inlet Finally rebuilt my carb to remedy my non-functioning accelerator pump. Previously, I had sealed up the threads on the filter fitting with teflon tape to get it to stop leaking. I didn't have the fitting gasket. My rebuild kit didn't come with one, but I grabbed one from another kit. It leaks, a lot. I even tried an AC o ring with no luck. I don't have the spring for behind the filter, or the little gasket that goes in front of the filter inside the fitting. Should I just go ahead and reseal it with teflon? I know teflon is not a great choice on those threads, but I can't think of anything else to seal it up.

06-20-2017, 03:15 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,736	Re: Need help with gas leaking from inlet If you're talking quadrajet, then look here for a self tapping replacement. They cut new threads that seals up the inlet. Just measure yours to get the right one. https://quadrajetparts.com/quadrajet...c6c74d5886ba5e

06-20-2017, 06:39 PM	#3
jayoldschool Moderator Join Date: Dec 2012 Location: ON, Canada Posts: 2,176	Re: Need help with gas leaking from inlet Guess I should have been more specific and it might not have been moved from 60-66. It is a 65 230 with a model B single barrel. I pulled the filter, did a thicker wrap of teflon and got the drip to stop. Tomorrow, I'll put an inline filter between the pump and carb. I wonder if the thread sealer that goes on head bolts would be a better choice than the teflon? I'm tempted to just JB Weld it in there...

06-20-2017, 07:11 PM	#4
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,736	Re: Need help with gas leaking from inlet Dig deeper! Maybe an extended thread one would work. https://quadrajetparts.com/inlet-fit...c6c74d5886ba5e

06-20-2017, 07:36 PM	#5
jayoldschool Moderator Join Date: Dec 2012 Location: ON, Canada Posts: 2,176	Re: Need help with gas leaking from inlet I went digging through my parts. I still have the complete intake/carb from a 71 350. It's a 2GC, so I'm bringing that fitting with me tomorrow to check to see if it works and seals. I checked my thread sealer tube, it's ok for fuel, so might try that, too!

06-20-2017, 07:58 PM	#6
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Need help with gas leaking from inlet Teflon or thread sealers won't work. Gasoline eats right though them and will only seal temporarily. Best thing to do is to see if you can get a tap as mentioned above or maybe find another used single barrel like yours for parts. One person you can call to see if they have anything to fix the problem is Mike's Carburetor Parts. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...



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