My brake pipe flares not holding fluid?/
Discussion
Had this problem before,but not quite as bad.Usually if i fit up the brake pipe unions into whereever they're going and if it leaks under pressure,give it a bit more of a nip up and that's it.This time no matter how much i flare the end,no matter how perfectly round it is it just won't hold fluid?The main problem im having this time is the end of the flare,compared to what came off the car, isn't getting spread wide enough,although my flaring kit has been ok before?Anyone any tips?It's just a cheap,but it's been dependable flaring kit,and it's copper pipes im fitting,the fluid is coming up between the pipe and union,not up the threads,cheers!
P.S It's a 1986 Renault 5 turbo if that matters??using 3/16ths pipe.
P.S It's a 1986 Renault 5 turbo if that matters??using 3/16ths pipe.
Edited by rumpelstiltskin on Saturday 4th August 15:06
and you're putting a single male flare on the end of the pipe?
Are there any marks or dirt on the back of the flare, preventing the union tightening it down?
There's no tiny bits of grit in the master cylinder bit?
It's the right size of pipe for the union?
(sorry if this is "stating the bleeding obvious" but I need to check!)
Are there any marks or dirt on the back of the flare, preventing the union tightening it down?
There's no tiny bits of grit in the master cylinder bit?
It's the right size of pipe for the union?
(sorry if this is "stating the bleeding obvious" but I need to check!)
Yes single male flare like the one was i took off.I tried to make it a double flare thinking it would 'widen' it a little,which it did,but still it wouldn't hold.Just done it a little bit more and i think it's 'just' holding fluid!:-)The union couldn't be any further screwed in lol,no threads showing!I also cleaned up the holes in the master cylinder before using it,maybe somehow somethings dislodged this time and made the seal!Thanks for your help!
rumpelstiltskin said:
Yes single male flare like the one was i took off.I tried to make it a double flare thinking it would 'widen' it a little,which it did,but still it wouldn't hold.Just done it a little bit more and i think it's 'just' holding fluid!:-)The union couldn't be any further screwed in lol,no threads showing!I also cleaned up the holes in the master cylinder before using it,maybe somehow somethings dislodged this time and made the seal!Thanks for your help!
Some thing's not right. Could you post pics of the flared ends, the one you took out & the ones you are making. Also it sounds as though possibly you have used the wrong unions. If you're using the the ones I think you are they come in two different lengths but the difference is only something like about 4mm. rumpelstiltskin said:
I was just told they were m10 with a 1mm pitch so that's what i got.The ones i took off the car were different slightly in that the threads didn't start right at the end like the new ones do.
You're union shouldn't tighten down to the very end. You may find the ones you took off are slightly longer, same thread & pitch but slightly longer. Have a look here at numbers B620 & B678. http://www.vehicle-wiring-products.eu/VWP-onlinest...Are you saying that the brake pipe nuts you've used are TTE, but the old ones weren't?
If that's the case, then it'll be the brake pipe nuts causing the problem - the nuts where the thread doesn't start at the end, the little collar extends into the housing beyond the depth of the thread in the female housing, and creates the clamping pressure on the flared pipe.
If that's the case, then it'll be the brake pipe nuts causing the problem - the nuts where the thread doesn't start at the end, the little collar extends into the housing beyond the depth of the thread in the female housing, and creates the clamping pressure on the flared pipe.
Superhoop said:
Are you saying that the brake pipe nuts you've used are TTE, but the old ones weren't?
If that's the case, then it'll be the brake pipe nuts causing the problem - the nuts where the thread doesn't start at the end, the little collar extends into the housing beyond the depth of the thread in the female housing, and creates the clamping pressure on the flared pipe.
Dont know what 'tte' means but i've just checked the auction pic i bought them from on Ebay,he's sent me the wrong ones!Here's the one's i 'thought' i bought on Ebay. http://www.ebay.co.uk/itm/110919320904?ssPageName=...If that's the case, then it'll be the brake pipe nuts causing the problem - the nuts where the thread doesn't start at the end, the little collar extends into the housing beyond the depth of the thread in the female housing, and creates the clamping pressure on the flared pipe.
Edited by rumpelstiltskin on Saturday 4th August 21:52
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