Compression fittings on fuel lines

[jonnymopar]

Can I use brass compression fittings on steel fuel lines? I figure, the stock ones are just rubber hose clamped on to the steel lines, so anything probably works. What do you guys think? I'm asking because I have them kicking around already and it would be a quick easy way to convert to an NPT size end.

[crazymadbastard]

I used it on mine no problem. It was both on the feed and return. Summit sells ones to convert to AN fittings too.

[TurboTurismo]

I used brass 1/4 fittings and braided line on one of my past cars with no problems.. PARKER fittings, Use teflon tape sparingly and far from the last thread to ensure to not block the openings..trust me it happens. keep you searching for hours tracking down pressure issues..lol..

Robb

http://www.cardomain.com/ride/2291434

[detobias]

you shouldnt have to use any teflon tape, anywhere, on a compression fitting.. its for pipe thread

the seal on a compression fitting is at the ferrule interface - not the threads

[jonnymopar]

Quote:

Originally Posted by detobias you shouldnt have to use any teflon tape, anywhere, on a compression fitting.. its for pipe thread

I think he meant on the threads:

Quote:

Originally Posted by Robb ...Use teflon tape sparingly and far from the last thread...

Definitely don't want any chunks of Teflon tape getting anywhere near your injectors. Guys, thanks for the help. Always good to be able to use parts kicking around rather than buying something.

[DustyR/T]

if you're referring to the threads on the compression unit itelf, it's not necessary. Compression's don't need sealant on threads period because they do absolutely nothing. Fuel line is ok for compression fittings in a pinch, but brake line is a BIG NO NO.

[morph26]

Not necessarily true. You can use compression fittings on brake lines, they just have to be flared properly. It is increasingly difficult to find pre-bent brake lines in the right length for any application, and so you have to use compression fittings in some instances. Just remember to flare the tubing.

[Tim_K]

Years ago on my old 1971 Plymouth Valiant, I had a compression fitting on one line right near the master cylinder. It was on there 5 years and never had a problem. It was a double compression fitting to put 2 metal lines together, no flare on the lines, they had those brass wedge things in the fitting.

I use some sandpaper on the ends of the tubing where the fitting will go. Wrap the sandpaper around the tube and twist it a few times, to clean the tube and make tiny "rings" around the tube with the sanding marks so the fitting has something better to grab onto.

[moparfreak3]

DO NOT use compression fittings on brake lines. It makes no difference if you have done it and it worked. Flare it and do it the right way!

[puppet]

My thing against them for fuel is the vibration and (?) how may times you can take them apart without developing a leak. If the fitting gets reorientated to any degree the barrel won't seal.
Our pumps put out a lot of pressure.

[GLHNSLHT2]

you shouldn't ever have to remove it.

[puppet]

Depends where it's at ... and on what though. Stuff happens ... you know that.

[Matt Cramer]

My Dart has them in quite a few spots. They can definitely take the typical pressure in a fuel system and are a good bit easier to set up than flare fittings.

[crusty shadow]

i re-ran fuel lines on my car, used lengths of straight brake line, connected them with brass unions. no leaks, solid as a rock. was pretty easy, bent the lines with my hands and was able to get it to fit in the original fuel line hangers. compression fittings would also work, but you have to make sure the ferrules are on there proplerly, line is not too small , bent going thru the ferrule etc. either one works, one looks nicer than the other.

DO NOT USE COMPRESSION FITTINGS ON ANY BRAKING SYSTEM COMPONENTS-EVER! its dangerous, copression fittings were not designed for those kinds of pressures- 1500+ psi can blow the fittings apart if there is anything even a little off with the flare fitting. its also illegal. most states have somthing about it in vehicle safety codes. when i was working at a local parts store a few years ago, a guy came in and asked for brake line compression fittings. i explained to him you cant do that its not safe. he said give em to me anyway. a highway patrolman who was waiting in line turned to him and said, " you put flare fittiings on your brake line and attempt to drive the vehicle i'll pull you over, impound your truck and give you a ticket for reckless endangerment." even if your state has no regulations about it, its still illegal according to DOT guidelines. dont put yourselves or others in danger by taking shortcuts on your brakes. that might be MY ass you plow into when your brakes fail......

[adrivinfool4u]

Quote:

Originally Posted by crusty shadow i re-ran fuel lines on my car, used lengths of straight brake line, connected them with brass unions. no leaks, solid as a rock. was pretty easy, bent the lines with my hands and was able to get it to fit in the original fuel line hangers. compression fittings would also work, but you have to make sure the ferrules are on there proplerly, line is not too small , bent going thru the ferrule etc. either one works, one looks nicer than the other. DO NOT USE COMPRESSION FITTINGS ON ANY BRAKING SYSTEM COMPONENTS-EVER! its dangerous, copression fittings were not designed for those kinds of pressures- 1500+ psi can blow the fittings apart if there is anything even a little off with the flare fitting. its also illegal. most states have somthing about it in vehicle safety codes. when i was working at a local parts store a few years ago, a guy came in and asked for brake line compression fittings. i explained to him you cant do that its not safe. he said give em to me anyway. a highway patrolman who was waiting in line turned to him and said, " you put flare fittiings on your brake line and attempt to drive the vehicle i'll pull you over, impound your truck and give you a ticket for reckless endangerment." even if your state has no regulations about it, its still illegal according to DOT guidelines. dont put yourselves or others in danger by taking shortcuts on your brakes. that might be MY ass you plow into when your brakes fail......

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