Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Rear Brake Line Replacement
Dear all, all our D4 has covered 82K and the rear brake lines are in need of replacement. I intend to use the preformed short metal lines for RH and LH sides LR021678 and LR021679, and oem Flexible pipes.
I am still debating wether or not to make my own brake pipes or buy the service kit to replace the corroded sections LH and RH that run the down the centre of car and then to the first set of flexi pipes.
My question is what type of the brake pipe connectors are used with the respective flare, are they
SAE or DIN on the D4.
Thanks in advance.
Eric
28th Aug 2023 11:23 am
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Rear Brake Line Replacement - Progress
With the rear exhaust section and heat shields removed, the pipes were inspected. The forward pipe sections were in good condition with no corrosion present. The rear sections are corroded to an extent that replacement is required.
After stripping the rear LH and RH short metal brakes lines I was able to identify the fittings as DIN.
The following photographs show the front to rear brake pipes and corrosion. The last photograph is were I intend to cut the pipe. I am going to practice bending and flaring brake pipes using my hand held DIN/SAE flare tool. More later.
1st Sep 2023 11:15 am
KevinD3
Member Since: 05 Aug 2020
Location: Sutton Coldfield
Posts: 1210
Looking good. Just a recommendation, you might want to think whether you want to lanoguard underneath while you’re on your back under there with everything stripped off.2008 HSE Stornoway Grey
My Wife thinks the D3 is a hobby, The D3 thinks the wife is 💕
1st Sep 2023 11:20 am
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Hi, Kevin, a very good point. The frame needs a good clean and protection.
2nd Sep 2023 9:38 pm
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Update
The LH pipe is made and ready for installation!
Install tomorrow and remove RH pipe.
2nd Sep 2023 9:40 pm
desv8
Member Since: 01 May 2020
Location: CHELTENHAM
Posts: 124
Watching on with interest as I’ve been putting off doing mine for a while now. After 3 years being advised at MOT I think it’s about time I bit bullet and got on with them.
Your pipes look brand new compared to mine by the way.
Nice post keep up the good work
Des
3rd Sep 2023 10:24 am
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Hi Des - Thanks for your comments, much appreciated.
An update
The brake pipe work is finished and the system bled and checked for leaks. Altogether, all the pipes and hoses have been replaced from just aft of the DPF.
The pipes, which I made up from Copper Nickel, where fiddly to fit but not difficult. All the pipe fittings were DIN as such the pipes were flared with DIN profiles.
During the installation new pipe clips were used throughout.
To bend the pipes I used a LASER pipe bender, this little tool was excellent being easy to use and produced good bends. The flaring tool was the ASTA A-ROG203 DIN/SAE hand tool. I had no issues with tool, flaring the steel or CU/NI pipes. What was important was that proper preparation of the pipe before flaring, good preparation contributed significantly to the end result.
The callipers have been serviced and new discs and pads installed.
RH pipes made using old pipe as pattern.
New pipes looking towards rear.
Pipes joined using female DIN inline connector
Click image to enlarge
Bending Tool used for this work.
I think it’s important to say, although I am an experienced engineer (aircraft), In doing this work I learnt so much from the many informative posts made by other members, to those members a big thanks.
Off to do front discs now!
5th Sep 2023 11:14 pm
DN D3 Decade
Member Since: 24 Jun 2006
Location: W.London.
Posts: 2296
Well done Joneseric, I had cause to do this to mine (D3) a couple of years ago. Very satisfying replacing all that corroded pipe work. A bit like yourself, having worked as an engineer on aircraft, all my working life, it was still an education doing the pipe prep and flaring / bending etc. helped along by others who had done the same.D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.
6th Sep 2023 12:01 am
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
Hi DN, thanks for your comments, very appreciated.D4 SDV6 since 2014. 82000 mls.
BMW R100 CS since 1983 264000 mls we think!
BMW Z3 1997 since 2004.
6th Sep 2023 10:52 am
Joneseric
Member Since: 16 Mar 2017
Location: Lincolnshire
Posts: 9
All completed with new discs and pads all round.
D4 SDV6 since 2014. 82000 mls.
BMW R100 CS since 1983 264000 mls we think!
BMW Z3 1997 since 2004.
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