Brake pipes renewal- advice/guidance

[bigwinn]

Hi all

Planning the renewal of my exposed brake pipes and lines in prep for the upcoming MOT

I did all pipes on an e30 and apart from looping it over the tank it was fairly straightforward. How is it on the e85?

Anyone done it- any top tips or guidance?
What to buy? Cunifer, joins, hoses etc?
Any tools? I haven’t got a flaring kit yet.

Thanks in advance- this forum is excellent and invaluable for helping the DIY’er

 

[colb]

Have got to give my rear nearside some new pipework after an advisory on the MOT, not yet had a good look at whats needed but have all the kit to do it. I am thinking I may replace the rears with a braided hose kit to replace the inner and outer flexi pipes more expensive than standard replacements. You can get a one piece braided hose that fits instead of the two hoses inner and outer which might be worth considering. For the money the set I am looking at includes front braided hoses.
https://www.ebay.co.uk/itm/BMW-Z4-E85-E86-3-0-2-5-2-2-ROADSTER-COUPE-S-STEEL-BRAIDED-BRAKE-LINES-HOSES-BPW/153138920241?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D225114%26meid%3D6a347c9db63649c98c96dc27ccd5139d%26pid%3D100678%26rk%3D1%26rkt%3D10%26mehot%3Dnone%26sd%3D333699563927%26itm%3D153138920241%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100678.m3607&_trkparms=pageci%3A9c3a1262-f868-11ea-8480-8a1a638d199c%7Cparentrq%3A98f2b4ab1740aa669626f471fffdfe60%7Ciid%3A1
and
https://www.ebay.co.uk/itm/HEL-PERFORMANCE-BMW-Z4-E86-E85-STAINLESS-STEEL-BRAIDED-BRAKE-LINES-HOSE-PIPES/152927472299?fits=Car+Make%3ABMW%7CModel%3AZ4&epid=651234282&hash=item239b300aab:g:q1kAAOSwtN9eBhcF

 

[mjennings23]

Replaced my rear lines and all hoses a couple of weeks ago, it's honestly a simple job. I joined up to the factory steel lines near the front of the car, behind the plastic undertray running front to rear with male to male unions then shaped the lines Insitu. You should be able to thread the pipe through the existing clips on the subframe with some patience and a second set of hands, that was the slowest bit but more fiddly than difficult.

I used kunifer pipe. You'll also need a flaring tool and pipe cutter. I bought a pipe bender too but hardly used it, the main area it's useful is the sharp 90 degree bend where the pipes exit the rear of the cover and head up into the wheel wells.

 

[Beesza]

Planning to do this at all 4 corners as I’ve had advisories 2 years running.

Is it best to replace the full pipe run or to join onto the existing OEM pipe behind the under trays? (Assuming only the exposed ends are corroded).

If doing the full run, could air get into the ABS unit? I’ve read that you need INPA to bleed this. I’d rather avoid. Thinking cling film under the reservoir cap should seal it and keep fluid in the ABS unit???

I’ll be using cunifer pipe. Will standard brake pipe unions do?

 

[bigwinn]

Planning to do this at all 4 corners as I’ve had advisories 2 years running.

Is it best to replace the full pipe run or to join onto the existing OEM pipe behind the under trays? (Assuming only the exposed ends are corroded).

If doing the full run, could air get into the ABS unit? I’ve read that you need INPA to bleed this. I’d rather avoid. Thinking cling film under the reservoir cap should seal it and keep fluid in the ABS unit???

I’ll be using cunifer pipe. Will standard brake pipe unions do?

Hi mate

Forgot to do a write up on this

Check the condition of the pipe under the car to decide- it’s covered by the plastic undertray so may be in good order

I found that by keeping the brake pedal pressed while doing the works and using the clingfilm no air went back into the abs unit

Kunifer is fine as are the unions just make sure your flaring tool is good quality as the most difficult flares are the existing steel pipes

 

[Beesza]

Kunifer is fine as are the unions just make sure your flaring tool is good quality as the most difficult flares are the existing steel pipes

That’s partly why I’m wondering about doing the whole length.

Any recommendations for a flaring tool? Send lots for around £20 like this one https://www.halfords.com/tools/hand-tools/automotive-tools/halfords-brake-pipe-flaring-tool-kit-187982.html

 

[bigwinn]

Kunifer is fine as are the unions just make sure your flaring tool is good quality as the most difficult flares are the existing steel pipes

That’s partly why I’m wondering about doing the whole length.

Any recommendations for a flaring tool? Send lots for around £20 like this one https://www.halfords.com/tools/hand-tools/automotive-tools/halfords-brake-pipe-flaring-tool-kit-187982.html

I bought that one and it wasn’t man enough for the steel

I then got a sealey one like this and it’s never let me down