How to: Fit braided steel brake lines / hoses (with video)

[vroomba]

This is my step by step guide on how to replace your standard rubber brake hoses with steel braided ones. 

Video of all this is here:

https://youtu.be/Czvr1_lNZew

 

Summary

Spray brake hose nuts

Loosen nuts

Remove hose

Fit new hose

Tighten huts

Check clearance

Repeat on remaining wheels

Bleed system

 

Tools and parts needed

Open ended spanners

Flare spanners

Penetrating fluid

Vice grips

Clamps

Stainless steel braided lines

 

 

1.      First you’ll need to remove a wheel.  Here’s both my jacking guide and wheel removal guide if you need it.  https://youtu.be/JDksAkO3eO0  https://youtu.be/La6i3TwMB8k

 

2.      This can get quite messy so put down a cloth or drain pan to catch brake fluid drips.

 

3.      You may not need this but generally the brake hose nuts can be stuck quite tight.  A generous spray of penetrating fluid will give you a fighting chance.

 

4.      Now loosen the nut holding the top of the brake hose.  You must use a flare spanner here otherwise you will round the nut.   If it refuses to move try move penetrating fluid and come back in 10 minutes.

 

5.      One trick you can do for more leverage on the nut is to join two spanners together.

 

6.      Be aware the metal brake lines these hoses connect to are quite weak so you must be careful when loosening the nuts that you are actually undoing the nut and not twisting the metal line.

 

7.      Once loose gently tighten back up to avoid brake fluid dripping out.  Remember, brake fluid damages paint so wipe off any spillages.

 

8.      For the bottom nut you’ll find the holding bracket is too weak and will bend if you try to loosen the nut.  Usually you would use another spanner to hold the brake hose but Porsche hose ends are rectangular.   To get round this use vice grips to hold the hose whilst you loosen the nut.

 

9.      Clamp the hose to stop fluid leaking out and then remove the bottom part of the hose.  Tuck it out of the way.

 

10.  Now fit the new braided hose to the bottom brake line.  Don’t tighten it hard just yet.

 

11.  Now remove the top part of the hose and set it aside.

 

12.  Connect up the top part of the new hose. 

 

13.  Now using an open spanner and a flare spanner you can tighten up both the top and bottom nuts. 

 

14.  On the front wheels turn the steering wheel slowly from lock to lock and check the new hoses don’t get stretched or snagged.

 

15.  Repeat on the remaining wheels.

 

16.  Now you’ll need to bleed the system. Here’s my guide on how to do this by yourself. https://youtu.be/Y_nw6yqoOkI

 

17.  One disadvantage of the new braided hoses is that they cannot be clamped as they will get damaged so it’s useful to keep original rubber hoses if you need to do maintenance work on the brake calipers in the future.

 

You’ll find all my guides for the 986 Boxster on my website here http://road-and-race.co.uk