Compression fitting to splice brake line?
#3080635
09/25/22 08:48 PM
09/25/22 08:48 PM
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Joined: Jan 2003
Posts: 7,538 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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Would you guys trust a compression fitting if you needed to splice any of your brake lines? Thanks, - Art
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: Compression fitting to splice brake line?
[Re: 67SATisfaction]
#3080666
09/25/22 09:59 PM
09/25/22 09:59 PM
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Joined: Dec 2009
Posts: 20,600 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Would you guys trust a compression fitting if you needed to splice any of your brake lines? Thanks, - Art Mmm, no.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Compression fitting to splice brake line?
[Re: Stanton]
#3080673
09/25/22 10:21 PM
09/25/22 10:21 PM
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Joined: Jan 2003
Posts: 7,538 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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Thanks guys, I will never trust that shop owner again. A reputable guy too, in the vintage/exotic restoration business in the Northwest. Sold me a car recently, I bought it sight unseen, with plenty of emailed photos, but I was also relying heavily on his reputation. The car failed its state inspection, and the compression fitting was one of several fails - the mechanic explained the same thing about pressure capacity. I think he said compression fittings are rated to 850psi, but brake systems are upwards of 2500. Thank you for letting me just double check whether anyone else used them as a common fix. The other Fails were due to lack of cotter pins at all steering linkage castle nuts, and worn out tie-rod ends. None of these issues are difficult or complicated, but that just amplifies the guy's sloppy work and poor service mindedness. Live and learn, - Art
Last edited by 67SATisfaction; 09/25/22 10:23 PM.
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: Compression fitting to splice brake line?
[Re: PhillyRag]
#3080675
09/25/22 10:25 PM
09/25/22 10:25 PM
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Joined: Jan 2003
Posts: 7,538 Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,538
Albany, NY
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Why go that apparently easy route, when a nice flare fitting would do fine? Exactly - I'm good at this kind of work, it'll take me maybe an hour to fix it, then refill and bleed the system.. So why didn't he do it right the first time? What a crap work ethic - not to mention liability.
Last edited by 67SATisfaction; 09/25/22 10:25 PM.
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: Compression fitting to splice brake line?
[Re: 83hurstguy]
#3080711
09/26/22 01:38 AM
09/26/22 01:38 AM
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Joined: Dec 2005
Posts: 11,408 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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I will be honest. I see plenty of hilljacks, shade trees, guys too dumb to use a flaring tool and the "aww, I do it all the time, never had a problem" guys do it, even after being told not to.
The answer is no. Everytime.
If the results don't match the theory, change the theory.
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Re: Compression fitting to splice brake line?
[Re: 83hurstguy]
#3080749
09/26/22 09:16 AM
09/26/22 09:16 AM
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Joined: Jan 2003
Posts: 10,666 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,666
North Dakota
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Absolutely true. I routinely worked with Parker CPI fittings for years in power plants at pressures up to 3500 psig. The problem is that most of these higher quality fittings are stainless steel rather than steel so you would have a materials compatibly issue.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Compression fitting to splice brake line?
[Re: 67SATisfaction]
#3080756
09/26/22 09:43 AM
09/26/22 09:43 AM
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Joined: Jan 2003
Posts: 11,894 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 11,894
Benton, IL.
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Compression fittings should not be used on brake lines. I agree.
But here's the reality: I have seen plenty of them used on brake lines for the better part of 45 years and don't remember seeing a single failure due to the fitting itself. Rusty or scaly lines where they cannot grip properly is a different matter. But I have not personally seen a fitting connection fail that wasn't compromised in some other way.
I have however, seen many double flare connections fail. Usually due to poor workmanship. They take practice and a good tool. Often both can be lacking.
Not an endorsement for using compression fittings on brake lines, just my experience.
Master, again and still
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Re: Compression fitting to splice brake line?
[Re: 67SATisfaction]
#3080989
09/26/22 09:21 PM
09/26/22 09:21 PM
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Joined: Jan 2003
Posts: 15,197 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,197
Omaha Ne
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Thanks guys, I will never trust that shop owner again. A reputable guy too, in the vintage/exotic restoration business in the Northwest. Sold me a car recently, I bought it sight unseen, with plenty of emailed photos, but I was also relying heavily on his reputation. The car failed its state inspection, and the compression fitting was one of several fails - the mechanic explained the same thing about pressure capacity. I think he said compression fittings are rated to 850psi, but brake systems are upwards of 2500. Thank you for letting me just double check whether anyone else used them as a common fix. The other Fails were due to lack of cotter pins at all steering linkage castle nuts, and worn out tie-rod ends. None of these issues are difficult or complicated, but that just amplifies the guy's sloppy work and poor service mindedness. Live and learn, - Art FWIW, I have seen all of the above and more on 200K BJ show ponies as well as others
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