87 Tank in a 75. Filler hose options? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kdh454 · 05-17-2016, 01:44 PM

I'm getting close to finishing my EFI conversion and have swapped out my '75 tanks for '87 TBI tanks in order to use in-tank pumps. All was good until I noticed that the '87 tanks accept 1 3/4" filler hoses where my '75 was 1 3/8". Obviously, my new 1 3/8" hoses are not going to stretch over a 1 3/4" barb, so what are my options?

I've found a 1 3/4" 90 degree elbow (Gates 24716), with which I could use a short piece of 1 3/8" tubing as a reducer if the OD is close enough. Is that really my only option?

I doubt I'm going to find a molded hose that fits perfectly, but hopefully someone here has ran into this before and has a solution!

Super_Dave · 05-17-2016, 01:52 PM

Can you go to an exhaust shop and get them to flare one end of the a section of tubing to fit over 1 3/8 and then flare the other end to 1 3/4 for the hose? They can also bend any angle you might need as well.

kdh454 · 05-17-2016, 01:56 PM

The thought has crossed my mind, I'm just not sure how much you can expand that tubing. Expanding it 3/8" sounds like a lot to me.

Super_Dave · 05-17-2016, 02:22 PM

Quote:

Originally Posted by kdh454

The thought has crossed my mind, I'm just not sure how much you can expand that tubing. Expanding it 3/8" sounds like a lot to me.

Remember, 3/8" is the diameter, so you are only expanding it .1875" (3/16") radius... not .375". The exhaust shop can tell you the limits if it sounds too radical to you.

LeesTruk · 05-17-2016, 02:30 PM

You don't have to do any fancy footwork here. Just get the Gates hose . The early filler pipe is 1 3/4" just like the later tank, so the Gates hose will just slide on each piece

I had to do this for my LS/'87 tank conversion. Just cut the new hose to match the dimension of the old hose. Even the vent hose from the early filler will fit onto the newer tank

kdh454 · 05-17-2016, 03:11 PM

That got me excited until I took a closer look at the filler neck in your picture. What you have there appears to be a 79-80 filler neck for use with a door, which is different from what I have.

LeesTruk · 05-17-2016, 03:18 PM

Yeah, I do have an '80 Fleetside. Is your filler that much smaller?. How about if you just cut a piece of the original hose to fit on your filler, then slide the Gates hose over that, using the original hose as a spacer?

05-17-2016, 01:44 PM	#1
kdh454 Registered User Join Date: Oct 2015 Location: Allen, TX Posts: 63	87 Tank in a 75. Filler hose options? I'm getting close to finishing my EFI conversion and have swapped out my '75 tanks for '87 TBI tanks in order to use in-tank pumps. All was good until I noticed that the '87 tanks accept 1 3/4" filler hoses where my '75 was 1 3/8". Obviously, my new 1 3/8" hoses are not going to stretch over a 1 3/4" barb, so what are my options? I've found a 1 3/4" 90 degree elbow (Gates 24716), with which I could use a short piece of 1 3/8" tubing as a reducer if the OD is close enough. Is that really my only option? I doubt I'm going to find a molded hose that fits perfectly, but hopefully someone here has ran into this before and has a solution!

05-17-2016, 01:52 PM	#2
Super_Dave Registered User Join Date: Jul 2014 Location: Sherwood, Oregon Posts: 974	Re: 87 Tank in a 75. Filler hose options? Can you go to an exhaust shop and get them to flare one end of the a section of tubing to fit over 1 3/8 and then flare the other end to 1 3/4 for the hose? They can also bend any angle you might need as well. __________________ --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...d.php?t=655783 --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...ghlight=Belair "Life is tough - wear a cup!" "Old Enough to Know Better - Too Young to Resist" "Junk is something you will need three weeks after you throw it away."

05-17-2016, 01:56 PM	#3
kdh454 Registered User Join Date: Oct 2015 Location: Allen, TX Posts: 63	Re: 87 Tank in a 75. Filler hose options? The thought has crossed my mind, I'm just not sure how much you can expand that tubing. Expanding it 3/8" sounds like a lot to me.

05-17-2016, 02:30 PM	#5
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 433	Re: 87 Tank in a 75. Filler hose options? You don't have to do any fancy footwork here. Just get the Gates hose . The early filler pipe is 1 3/4" just like the later tank, so the Gates hose will just slide on each piece I had to do this for my LS/'87 tank conversion. Just cut the new hose to match the dimension of the old hose. Even the vent hose from the early filler will fit onto the newer tank

05-17-2016, 03:11 PM	#6
kdh454 Registered User Join Date: Oct 2015 Location: Allen, TX Posts: 63	Re: 87 Tank in a 75. Filler hose options? That got me excited until I took a closer look at the filler neck in your picture. What you have there appears to be a 79-80 filler neck for use with a door, which is different from what I have.

05-17-2016, 03:18 PM	#7
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 433	Re: 87 Tank in a 75. Filler hose options? Yeah, I do have an '80 Fleetside. Is your filler that much smaller?. How about if you just cut a piece of the original hose to fit on your filler, then slide the Gates hose over that, using the original hose as a spacer?



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