Not flaring my fuel lines! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

In The Ten Ring · 04-19-2015, 06:07 PM

Today I grabbed a break and did some study. Rubber hose doesn't slip onto single flared lines very easily and my kit won't do bubble flares.

About a year ago a couple of members suggested I not even flare my new fuel lines and I think they might be right. I easily slipped hose onto unflared lines and clamped with hose clamps....I couldn't pull it apart.

So I don't think I'm going to flare at all. 250 I6 engine, 1 barrel carb, and mechanical fuel pump are the stats.

Your thoughts?

enaberif · 04-19-2015, 06:11 PM

I have a cheap $50 double flare kit from a parts store. When I did my fuel lines I used the flat side and flared the tube. It creates a small "bump" on the line which allows a clamp to be secure and the hose not to slip off.

**Boog** · 04-19-2015, 07:54 PM

You know you don't have to do a complete flair. You can just slightly flair that line enough to create a wide spot to create some hold where if the hose clamp did get loose the pressure couldn't push the hose off the line. Or pickup the OE correct line and eliminate that possible fire hazard.

EARNHARDT#3 · 04-19-2015, 08:22 PM

There's no pressure anyway. The pump is pulling fuel from the tank. Different story when the pump is inside the tank.

enaberif · 04-19-2015, 08:43 PM

Quote:

Originally Posted by EARNHARDT#3

There's no pressure anyway. The pump is pulling fuel from the tank. Different story when the pump is inside the tank.

Mechanical pump to carb is 5-6psi of pressure.. Which isn't much but on a unsecured hose it could pop it off.

In The Ten Ring · 04-19-2015, 09:09 PM

I was going to use a couple of hose clamps (screw kind) on either end. Would that secure it enough?

enaberif · 04-19-2015, 09:24 PM

Quote:

Originally Posted by In The Ten Ring

I was going to use a couple of hose clamps (screw kind) on either end. Would that secure it enough?

When it comes to fuel I take no chances.. Watch this video.

https://youtu.be/KaO2jAWqVU0?t=2m22s

EARNHARDT#3 · 04-19-2015, 09:34 PM

Quote:

Originally Posted by enaberif

Mechanical pump to carb is 5-6psi of pressure.. Which isn't much but on a unsecured hose it could pop it off.

From the pump to the carb should be a steel line with fittings at either end. Rubber hoses would be at either end of the line from the tank to the pump.

rx78nt1alex · 04-19-2015, 10:18 PM

Like this homemade beauty! Not really, its ugly and my first attempt at bending lines and flaring, but no leaks!

enaberif · 04-19-2015, 10:42 PM

Quote:

Originally Posted by EARNHARDT#3

From the pump to the carb should be a steel line with fittings at either end. Rubber hoses would be at either end of the line from the tank to the pump.

I'm currently running rubber between pump to carb because my metal line broke and finding a replacement is not easy. It works and when I have time I'll redo it properly with a nice metal line.

EARNHARDT#3 · 04-20-2015, 06:53 AM

Quote:

Originally Posted by enaberif

I'm currently running rubber between pump to carb because my metal line broke and finding a replacement is not easy. It works and when I have time I'll redo it properly with a nice metal line.

You can make it up with brake line. Do you have an inline 6 or a V8?

04-19-2015, 06:07 PM	#1
In The Ten Ring Registered User Join Date: Jun 2013 Location: West Virginia Posts: 6,427	Not flaring my fuel lines! Today I grabbed a break and did some study. Rubber hose doesn't slip onto single flared lines very easily and my kit won't do bubble flares. About a year ago a couple of members suggested I not even flare my new fuel lines and I think they might be right. I easily slipped hose onto unflared lines and clamped with hose clamps....I couldn't pull it apart. So I don't think I'm going to flare at all. 250 I6 engine, 1 barrel carb, and mechanical fuel pump are the stats. Your thoughts?

04-19-2015, 06:11 PM	#2
enaberif Registered User Join Date: Jan 2009 Location: Calgary, AB Posts: 1,181	Re: Not flaring my fuel lines! I have a cheap $50 double flare kit from a parts store. When I did my fuel lines I used the flat side and flared the tube. It creates a small "bump" on the line which allows a clamp to be secure and the hose not to slip off.

04-19-2015, 08:22 PM	#4
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	Re: Not flaring my fuel lines! There's no pressure anyway. The pump is pulling fuel from the tank. Different story when the pump is inside the tank. __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP

04-19-2015, 09:09 PM	#6
In The Ten Ring Registered User Join Date: Jun 2013 Location: West Virginia Posts: 6,427	Re: Not flaring my fuel lines! I was going to use a couple of hose clamps (screw kind) on either end. Would that secure it enough?

04-19-2015, 10:18 PM	#9
rx78nt1alex Registered User Join Date: Jul 2013 Location: CEDAR HILL, TX Posts: 43	Re: Not flaring my fuel lines! Like this homemade beauty! Not really, its ugly and my first attempt at bending lines and flaring, but no leaks! Attached Images __________________ 1968 Chevrolet Fleetside C-10 1971 Chevrolet Fleetside C-10

04-19-2015, 07:54 PM	#3
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,514	Re: Not flaring my fuel lines! You know you don't have to do a complete flair. You can just slightly flair that line enough to create a wide spot to create some hold where if the hose clamp did get loose the pressure couldn't push the hose off the line. Or pickup the OE correct line and eliminate that possible fire hazard. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross



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