 Fuel Return Line Questions |
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| friethmiller |
 Apr 7 2025, 09:05 PM
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#1
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Senior Member  Group: Members Posts: 845 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region 
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My Red '74 (a.k.a Denise) is getting a return line but I'm having issues finding the right size return line hose to go between the tank and the SS line. I have a 5/16" (8mm) rubber hose that looks like it might work. Waited 4 days for Sierra Madre to ship a 7mm ID braided hose, which turned out to be > 8mm (just too loose). (IMG:style_emoticons/default/headbang.gif) I want to go with the 5/16" line but I really think both of these ends should be bubble flared. Has anyone done this? Anything to watch out for? Any other solutions here? I don't need these connections leaking or sliding off.
Also, I have a rubber washer on the return pipe and just a brass washer + screen in the feed. Is this normal? Can I use something like Curil T to help seal these connections? Thanks in advance.   |
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| Superhawk996 |
Apr 8 2025, 08:18 AM
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914 Guru Group: Members Posts: 6,962 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(friethmiller @ Apr 7 2025, 11:05 PM)  I really think both of these ends should be bubble flared. Has anyone done this? Anything to watch out for? Any other solutions here? I don't need these connections leaking or sliding off. The bead rolling tools for small diameter tube are rather pricey and each tool only covers a small size range of tubing. If you have the time - you might ask Chris Folley how much he’d charge to bubble roll them for you. Local hot rod / fab shop might have a set too. Since these lines aren’t under much pressure they aren’t as likely to slip off but as you know, bubble flare is best practice. I was always a little surprised they Weren’t rolled as original equipment. |
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| Ron914 |
Apr 8 2025, 09:59 AM
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#3
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Member Group: Members Posts: 216 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California
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QUOTE(Superhawk996 @ Apr 8 2025, 09:18 AM) QUOTE(friethmiller @ Apr 7 2025, 11:05 PM) I really think both of these ends should be bubble flared. Has anyone done this? Anything to watch out for? Any other solutions here? I don't need these connections leaking or sliding off. The bead rolling tools for small diameter tube are rather pricey and each tool only covers a small size range of tubing. If you have the time - you might ask Chris Folley how much he’d charge to bubble roll them for you. Local hot rod / fab shop might have a set too. Since these lines aren’t under much pressure they aren’t as likely to slip off but as you know, bubble flare is best practice. I was always a little surprised they Weren’t rolled as original equipment. I see what you see , straight ends the bubble flare would give added protection from slipping or coming off if the clamp loosened . (IMG:style_emoticons/default/agree.gif) |
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Posts in this topic
friethmiller Fuel Return Line Questions Apr 7 2025, 09:05 PM
mepstein I go to flaps and get whatever high pressure fuel ... Apr 7 2025, 09:57 PM Dynosoar11 The return is very low pressure. I would not chang... Apr 8 2025, 08:43 AM
friethmiller
The return is very low pressure. I would not chan... Apr 8 2025, 10:52 AM Superhawk996 I don’t know what you mean by sealant
Definite... Apr 8 2025, 11:20 AM technicalninja I would use a true circular hose clamp.
Early fue... Apr 8 2025, 12:18 PM friethmiller Ok, I talked with a guy at lunch that has a lot of... Apr 8 2025, 01:01 PM friethmiller This might be like wearing two condoms, I don... Apr 10 2025, 05:54 AM |
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