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Fuel Line Flare

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I'm making my fuel lines. Mostly hard line [5/16] but will use fuel hose where necessary.

Quick question. What flare should I use on the hard line where it joins the hose? No flare, double flare, bubble flare??
Thanks
 
I'm making my fuel lines. Mostly hard line [5/16] but will use fuel hose where necessary.

Quick question. What flare should I use on the hard line where it joins the hose? No flare, double flare, bubble flare??
Thanks
a little bubble.. that's just me though.. some people don't flare but i'm crazy paranoid about random gas spraying around, every bit helps :)


1761054977482.jpeg
 
Yep, a little bubble flare would be perfect for mating to rubber hose with a clamp. For steel lines, a single flare would be ok. Brake line you buy pre flared will be double flare of course. If you are using bulk steel line, you could use either flare.
 
* if you make your own lines.. get nickle copper... OMFG..... i didn't listen and when i finally did it is soooo insanely easy to work with compared to steel...
 
* if you make your own lines.. get nickle copper... OMFG..... i didn't listen and when i finally did it is soooo insanely easy to work with compared to steel...
That stuff is the way to go.
 
I like to use a bubble flare. With the low pressures involved it’s probably not critical but it does give me some peace of mind.
 
But it looks sexy and I would like to know how to do it. It does looks more functional than just slipping it over the tube.
 
I have a regular flaring tool. What should I be looking for?
 
Here's the difference between the two.
1761066356858.png
 
For the one in the pic i posted way up top which technically isn't a bubble flare.. i just use my flare tool and start the flare and stop when it just gets where i want instead of following through...
 
This tool is one of the best things i ever bought.. $69 and i will never use the old flare tools again.
1761066948975.jpeg
 
BUT.. pretty much like this.. just don't crank it down so hard to where it flattens...
 
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