Technical Can you use compression fittings withthe new brake lines?

I am worried the new coated brake lines will not work with the old compression type fittings. I have an emergency fix to do and would like to splice in some of the new tubing with compression fittings. It a trans cooler line. THANKS for any opinions.

 

Trans guy told me long ago that compression fittings would be fine for trans lines. I'd give a shot. Are cut and splice with hose. Putting a dog knot on the metal lines first.

 

I guess the safe thing would be to wire brush the plastic off. I don't think I can get in there to put a partial double flare on it. Thanks

 

The green coating usually needs to come off.

The cunnifer lines take compression fittings well.

Compression fittings on both style lines in Trans and power steering lines. Trans cooler lines don't have much pressure but power steering sure does and there's been no problems with many miles and daily driver use.

 

You don't ever use compression fittings on brake lines.

 

I was getting ready to say that.
Then I read his post.


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Brake lines? Transmission?
Trans-brake??? LoL

I've used compression fittings on steel transmission cooler lines and also on a power steering line once.
the trans line fix made me a tiny bit nervous but really isn't that big a deal, but the one on the pwr steering made me a lot nervous.
Still worked...but I didn't enjoy the car all that much. Constantly bothered me thinking it might pop.

Comp fittings on brake lines are a total no-no. Use double flare joiners and then you can relax.

 

Broke a fuel line a couple weeks ago on a ***mins diesel and used a piece of the green 5/16 brake line to fix it, the orginal broke at the flare so I cut and bent the new line to fit and used a compression union to mate it to the steel line, that line runs about 280/300 #'s fuel pressure, it held for another 3 hrs till I got to my shop and built a new line, didn't file the coating off just cinched it down and took off. Wouldn't use those on brake lines though.

 

Hell to the no!

No compression fittings on brake lines, ever!

 

It's your life and anyone riding with you. If you use C-Fitting on brake line your playing with the Devil. That' a NO NO Deal.

 

Unless my memory has faded with age like a few other things I think in terms of safety inspections it has always been illegal to use c-fittings on brake lines for good reason. Someone correct me if I am wrong.

 

Obviously, at least half the responders did not read the OP's post, only the thread ***le.

Ray

 

^^^^^^ what he said! In my youth I have repaired trans lines with rubber hose and worm clamps. Never blew one!

 

For a transmission cooler line it will be okay. I've fixed a few with a piece of hose and 2 clamps to get me home.

 

Hey that's actually far better than usual

 

Compression fittings on brake lines are not legal in PA. for state inspection.

 

Ooooh bet we get to under 1/2 real quick

 

on a trans cooler line yea , as its only 20-50 psi . but still I would replace it later as the pump does pulsate the line and it might loosen the furl/pipe bond and if the line failed once , its about time to replace the whole thing . on terne or cunifer lines leave it alone , on the plasticoated , scrub it clean with sandpaper .

as for on brakes... never .

 

I guess I will always be known as the guy that uses compression fittings on brakes. They actually work great with the copper lines.

 

Some people are just to busy to read the whole post.I welded some brake line on a fender to strengthen the lip. Now I bet if I posted that they would say "never weld a brake line"
This place is so much fun.

 

Andy don't worry about that, they couldn't read the post so what makes you think they paid any attention to who posted it?

 

They use compression fittings on diesel injector lines that see 3000 psi.

 

Compression fittings on brake lines is a huge no no. I run a shop and everyone gets all wound up when we find compression fittings on brakes from someplace else. Automatic fail for safety.
What bugs me is I've seen a bunch, yet I've never seen one fail?!?
Still we always get rid of them. They're fine for trans cooler lines.


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I think I've noticed that, but aren't they slightly different than the 3/16 brake line compression fittings?
Not that this thread is about brake lines.


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Isn't that what normally happens?

 

Well...........yes..........always has and always will......that's what gave rise to the expressions "Jumping to conclusions" and "getting the cart before the horse" a**** others.......

Ray

 

My question aren't brake lines a little small for trans cooling lines?

 

Yup, and EVERY day I sell a few. I ALWAYS tell them that these are not suitable for brake lines, AND point out the warning on the package. Was told once "I know what I'm doing.". I've also heard "It's my wife's car.". "I'll fix it right next week, today it's an emergency.". Then again, given the diagnostic ability of most of our customers (similar capability to that of a parsnip), I'm starting to think I work at Advance Auto Parts RENTAL...

Cosmo

P.S. Compression fittings on trans cooler lines should be fine, but then, adding a bit of hose and clamps would also work well, and be easier.

 

Yes, and therein lies the misjudgement of those who claim that some just read the ***le alone.

 

Try looking in the junkyard for the failed ones.