Seals for Holley fuel transfer tube - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CCCC · 06-26-2020, 06:26 PM

Just rebuilt a Holley and the new kit provided some sort of boots to seal each end of the fuel tube (connecting front and back bowls) - had never seem those before - normal sealing in past has been done with "O" rings. Not good so far - they both leak.

Is there some unique trick for installing these boots so they will seal properly (I did lightly lube the tube) and what might I have done wrong? Will go digging back into the left-over seals/gaskets to see if the kit also provided "O" rings as well, and probably will install those in an effort to end the leaking.

But, if you have experience with these boot type seals and can give insight on how to succeed, I would like to know. Thanks.

geezer#99 · 06-26-2020, 08:26 PM

That boot is the new style.
Made for a tube that doesn’t have the little ridge. Just smooth pipe.
You need o rings for the ridge type tube.
I use Vaseline on the ends of the tubes and o rings to get them on and sealed.

Parts store should have o rings.

CCCC · 06-27-2020, 05:18 PM

Thanks geezer - makes sense now that you gave the update.. All of the Holleys here are plenty old - no smooth pipes. I will find the needed "O" rings. Thanks again.

BigBird05 · 06-27-2020, 09:57 PM

The O-rings need to be for the new fuel or it will eat them up in no time.

CCCC · 06-28-2020, 05:39 PM

Quote:

Originally Posted by BigBird05

The O-rings need to be for the new fuel or it will eat them up in no time.

If you are talking about fuel with ethanol - good caution - although the big problems for me were corrosion in fuel tank and lines with resulting residue crud clogging and getting past filters, and eating fuel pump diaphragms. No "O" rings eaten yet.

But, I am no succeeding in keeping real gas (no ethanol) in the old trucks so have not been worried as in the past. Is "new gas" something else beyond the ethanol?

I have a chance to get a supply of AV gas - any problems there?

06-26-2020, 06:26 PM	#1
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Seals for Holley fuel transfer tube Just rebuilt a Holley and the new kit provided some sort of boots to seal each end of the fuel tube (connecting front and back bowls) - had never seem those before - normal sealing in past has been done with "O" rings. Not good so far - they both leak. Is there some unique trick for installing these boots so they will seal properly (I did lightly lube the tube) and what might I have done wrong? Will go digging back into the left-over seals/gaskets to see if the kit also provided "O" rings as well, and probably will install those in an effort to end the leaking. But, if you have experience with these boot type seals and can give insight on how to succeed, I would like to know. Thanks. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp

06-26-2020, 08:26 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,668	Re: Seals for Holley fuel transfer tube That boot is the new style. Made for a tube that doesn’t have the little ridge. Just smooth pipe. You need o rings for the ridge type tube. I use Vaseline on the ends of the tubes and o rings to get them on and sealed. Parts store should have o rings.

06-27-2020, 05:18 PM	#3
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Re: Seals for Holley fuel transfer tube Thanks geezer - makes sense now that you gave the update.. All of the Holleys here are plenty old - no smooth pipes. I will find the needed "O" rings. Thanks again. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp

06-27-2020, 09:57 PM	#4
BigBird05 Registered User Join Date: Aug 2019 Location: Cheraw Posts: 1,305	Re: Seals for Holley fuel transfer tube The O-rings need to be for the new fuel or it will eat them up in no time.



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