HP pipes leaking

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cauchoiskev
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HP pipes leaking

Post by cauchoiskev » Mon Apr 04, 2016 4:34 pm

First off, it was the rear right side brake pipe. So, off I went to the local dealer. The guy at the desk knew nothing about BXs - and this is in France, a moderately big dealership. He showed me a screen with everything NFP. I pointed out to him that the brakes weren't shown. So he searched around and eventually found the right page. Everything NFP... except the rear brake pipes. Hurray !

Incredibly, they were also cheap, so I bought both of them. They weren't in stock, of course, so I went to pick them up today. Another guy at the desk, who knew even less than the previous one. I asked for four joints to fit the pipes, he took fifteen minutes to find them on the computer : none in stock. Can you believe that ? Hydraulics are finished at Citroën, even here in France. We are now driving very special cars indeed.

So, I started taking off the old pipe (looks like being a case of dropping the sub-frame to get the new one back in ?). Uh-oh, LHM starts dripping from the 90° bend in the suspension pipe just beside it. I'm pretty sure it is NFP. So that's the car off the road until I find a solution. Any ideas folks ?

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Re: HP pipes leaking

Post by Richb » Mon Apr 04, 2016 5:20 pm

Ebay seems to have most pipes available. Citronox seem to supply them all. It does also look likr you can biy the pipe, but i havent worked out the flaring part yet.
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Re: HP pipes leaking

Post by rutter123 » Mon Apr 04, 2016 8:04 pm

You shouldn't need to drop the subframe to change them, tho where they pass thru the 90 degree bends you will prob find the little clamps are seized and may require the 10mm bolts drilling out, I have recently done both rear brake lines on mine to find exactly this. Another tip is to cut the old metal pipes off close to the unions then you can get a socket on it to get them out easier with a good soak in releasing agent overnite first.
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cauchoiskev
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Re: HP pipes leaking

Post by cauchoiskev » Tue Apr 05, 2016 2:14 pm

OK, I found this http://www.ebay.fr/itm/raccord-hydrauli ... xyhotSMx0- which should do the job and should be delivered before the end of the week. I will keep you posted, it could interest other French-based members.

I also found this : https://www.citparts.at/en/products.php?id_group=124 and this : http://www.schaalbouw.nl/citroen/flaring.htm which looks like a solution for further problems.

@rutter123, I take it you managed to pass the whole pipe from the T union side towards the brake side ? The spiral looks like a tight fit.

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Re: HP pipes leaking

Post by rutter123 » Wed Apr 06, 2016 12:41 pm

I got my pipes supplied as a set length both sides from Plaedies in the UK, they are supplied in a coil at the correct length per side and are a "bend to fit" set up so yes it was fairly easy to fit from the underside outwards supplied with enough length to allow for the amount of spirals s in the pipe 5 or 6 either side (this allows for the pipes to flex) I find using these cupra nickel pipes a bit easier than the o/e steel made up pipes as they allow for a bit of flexibility when fitting. Ensure when fitting that the small 90 degree clamps are a good tight fit as any rubbing or movement here will ultimately break the pipes.
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cauchoiskev
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Re: HP pipes leaking

Post by cauchoiskev » Fri Apr 08, 2016 5:38 pm

I received the kunifer pipe yesterday, very fast delivery. The ends are shaped exactly like the OEM pipes :

Image

However, the bore of the pipe is much smaller than the original (at least at the ends ) :

Image

Is this always the case with kunifer pipes ?

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Re: HP pipes leaking

Post by KevR » Wed Apr 20, 2016 6:35 pm

I think you just need to ream the end of the pipe slightly - looks like it's been smeared over while cutting.
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Re: HP pipes leaking

Post by cauchoiskev » Fri Apr 22, 2016 3:03 pm

Well, the pipe was marked 3.5x0.71, so I assume the inner diameter should be 2.08mm. I drilled the two ends to 2mm before fitting it.

Seems to have worked fine, the rear end comes up as fast - or as slowly - as before the change.

I also built this pipe-flaring tool : http://www.schaalbouw.nl/citroen/flaring.htm . I'll have to buy some pipe to try it out now...

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Re: HP pipes leaking

Post by KevR » Fri Apr 22, 2016 4:53 pm

No reason why that tool shouldn't work, but if you want to make a load of them, you're welcome to borrow my big workshop-version flaring tool. Really makes it easy peasy.
1990 BX TZD Estate ('the grey one', 1991 BX TZD Estate ('the white one'), 1982 2CV6 Charleston (in bits), 1972 AZU Serie B (2CV van), 1974 HY72 Camper, 1990 Land Rover 110 diesel LWB, 1957 Mobylette AV76, 1992 Ducati 400SS, 1966 VW Beetle, 1990 Mazda MX-5, 1996 Peugeot 106D, 1974 JCB 2D MkII, 1997 BMW R1100RS, 1987 Suzuki GSX-R1100, 1978 Honda CX500A, 1965 Motobecane Cady, 1988 Honda Bros/Africa Twin, 1963 Massey Ferguson 825, and a lot of bicycles!