OUTRUN
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Hi, hopefully one of you gents can assist me with this problem...
The rear brakes on my mk3 Escort will not stop leaking. All of the braking system is new, front and rear, aside from the main hard pipes. Althought the short hard pipes from rear flexi - wheel cylinder are new.
This is where it is leaking. I have tried tightening the unions much more than is usually needed, still no good.
I spoke to a mate (jikovron) and he said some cylinders need a double flare as opposed to the single on theae pipes. Armed with his knowledge, I checked the cylinder, and it is a single flare type.
So, if it is leaking from the union into the cylinder, but the cylinder itself, inside the drum etc is dry, can it only be the pipe at fault?
Ill add a pic of the pipe in question. Awkward on phone when mobile site isn't working...
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Last Edit: Jun 3, 2013 9:36:25 GMT by OUTRUN
I need your help to get back to the year 1985.
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OUTRUN
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Posts: 620
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Looks ok? Cheers, Liam
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I need your help to get back to the year 1985.
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May 25, 2013 10:06:09 GMT
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Examine the cyclinder carefully - there might be a chip in the flare mating area or hairline crack. Copper / Kunifer type pipes normally deform easily when tightened to fit and seal against the mating area of the cylinder so personally I doubt they are the problem.
Paul H
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OUTRUN
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May 25, 2013 10:16:22 GMT
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Cheers Paul. I asked someone about the cylinder leaking, but they said they would onlh leak into the drum. Whereas I was thinking it could be an issue like you state.
I will whip them both off, and if they appear OK, I think rather than fill the resevoir again, I will just connect the pipes to the cylinders and fill off the car. See if a more precise leak an be located then.
You try and improve things by renewing them and this is where it gets you... lol.
Cheers mate, Liam.
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Last Edit: May 25, 2013 10:17:11 GMT by OUTRUN
I need your help to get back to the year 1985.
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May 25, 2013 10:18:17 GMT
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Hi, you cant be doing it up tight enough, the corners of the nut aren't rounded off!
But, seriously I would cut the flare off and reflare it. I have known the corners and edges to split and with the pressures involved it only needs a pinhole to leak.
Colin
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May 25, 2013 14:18:54 GMT
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Totally agree with colnerov, i suffered the same problem as you are having a few times over the years and it's been cured every time by re-flaring the pipes.
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OUTRUN
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May 25, 2013 23:51:51 GMT
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I need your help to get back to the year 1985.
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OUTRUN
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May 26, 2013 16:27:28 GMT
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Just had some more bent up from kunifer. Elsewhere. The shop owner said the ones above were curse word. Incorrectly flared. These new ones look much better. Will report back when I fit them. BBQ time.
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I need your help to get back to the year 1985.
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OUTRUN
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May 29, 2013 19:00:19 GMT
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It still leaks. Can only be the cylinders. The damn thing has had about four litres of brake fluid through it now.
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I need your help to get back to the year 1985.
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OUTRUN
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May 29, 2013 19:02:03 GMT
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It still leaks. Can only be the cylinders. The damn thing has had about four litres of brake fluid through it now.
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I need your help to get back to the year 1985.
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May 29, 2013 19:52:55 GMT
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Are you 100% sure it's comming from the pipe inlet side of the cylinder and not the bleed nipple side ? Clean off and dust with talc (or cornflower etc - basically anything fine and dusty) that will show actual leak area far more easilly than just looking for dampness.
paul h
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OUTRUN
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May 29, 2013 20:02:00 GMT
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It does seem to be. I have a small strip of paper directly below the nipple and pipe fitting on the rear of the cylinder, so will look for something more definitive tomorrow.
I will also try your suggestion. Thanks.
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I need your help to get back to the year 1985.
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v8ian
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You havent got imperial fitting in a metric cylinder? ?
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style. Austin A35van, very different------- but still doing it in style, going to be a funmoble
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OUTRUN
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May 30, 2013 12:59:50 GMT
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You havent got imperial fitting in a metric cylinder? ? I am 99% certain that I don't, mate. The fittings screw in by hand easily enough. What I do have is a bleed nipple in one cylinder that wasn't supplied with them. As I misplaced it. That would maybe explain it if only one side was suspect. Here's the findings from the flour. Applied last night. Checked maybe 14 hours later. I'm away out this afternoon to find some new cylinders. OE Ford stuff is too expensive. I will try for QH or another 'name'. Unless anyone has an alternative recommendation?
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I need your help to get back to the year 1985.
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OUTRUN
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May 30, 2013 13:07:00 GMT
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Double post.
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Last Edit: May 30, 2013 13:07:51 GMT by OUTRUN
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OUTRUN
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May 30, 2013 13:28:00 GMT
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A mate has suggested swapping around the pipes and nipples as they are probably in the wrong holes.
I thought it never mattered if one hole wasn't higher than the other.
I have nothing to lose in trying though.
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I need your help to get back to the year 1985.
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May 30, 2013 13:41:32 GMT
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It still leaks. Can only be the cylinders. The damn thing has had about four litres of brake fluid through it now. looking at the pipe on the left looks to small for the nut are u using the right size pipe
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v8ian
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May 30, 2013 16:25:53 GMT
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Are the pipes nipped up tight, I'm not sure which way round it is but either metric will screw into imperial or the other way round but bind when they get near the bottom, something in the back of my mind says Metric fittings usually have a small V machined across the corners of the nuts, which sorta agrees with what RalDes show. www.rallydesign.co.uk/index.php?cPath=562_85_86_1316
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style. Austin A35van, very different------- but still doing it in style, going to be a funmoble
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RobinJI
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"Driven by the irony that only being shackled to the road could ever I be free"
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May 31, 2013 20:24:50 GMT
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Pretty sure it's imperial that will screw into metric (3/8ths 24tpi is 9.525mm x 1.058mm, so will go into M10x1). It screws in fine, but is a little loose on the threads. That said, it shouldn't be sealing on the threads, it should be sealing on the flares. I have found joints like these to be able to leak from over-tightening sometimes, they really don't need to be very tight. I've always been told that the correct torque for them is just 'as soon as they stop leaking'. If you go too tight then you're bottoming the shroud out into the taper, rather than it directly crushing the flare, not sure if that makes any sense, but I've found it to be the case sometimes. (admittedly only rarely.)
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OUTRUN
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Thanks Iain and Robin. That makes sense.
I bought some new cylinders and fitted yesterday. Refilled fluid but didn't bleed or depress the pedal. This morning I had a drop from one side and a couple of dribbles on the other.
I am hoping this is just overspill from removing the pipes, that despite my best efforts, I missed when drying/cleaning up, and has dripped off the back plate.
I wiped everything over with a dry cloth again and put some white paper beneath. Four hours later, they were still bone dry.
If they still are when I return later on, I will bleed it and apply some pedal pressure, then see what happens when left o ernight.
If I still have problems after this, then I will purchase new pipe fittings, to ensure they are correct.
These new cylinders (Andrew Page supplied. Brake Engineering branded), seem better quality to me. Hopefully they are.
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I need your help to get back to the year 1985.
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