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Brake hard lines
https://forums.tipec.net/viewtopic.php?f=25&t=7618		 Page 1 of 1
Author:  madrob6 [ Tue Jan 19, 2010 9:00 am ]
Post subject:  Brake hard lines
I'm going to be ordering the parts I need to replace my brake lines this week but not sure how much pipe I need. I've found this on frost.co.uk which is 7.77m but not sure if one would do the job or if I'd need two. Or is there a better supplier I could use?

Cheers guys.
Author:  David924S [ Tue Jan 19, 2010 9:38 am ]
Post subject:  Re: Brake hard lines
I would have thought 7.77m would be enough although when I have done them before I have used a length of string to measur the existing line runs to make sure. I usually just buy mine from the local motor factors but tend to buy cunifer rather than steel to prevent the corrosion issues. I had no free time when the ones on my S2 needed doing so I gave the job to my local garage who only charged £130 for the lines front to back and they previously replaced all the lines on my 924S for £300 including two front discs and pads, so hardly worth getting dirty for. Are you going to replace the flexibles with braided lines as this made a big difference to the feel in my car.
Author:  madrob6 [ Tue Jan 19, 2010 9:50 am ]
Post subject:  Re: Brake hard lines
Well at the moment the car isn't roadworthy and I have no way of transporting it to a garage so it would cost more just to get it there and I don't mind getting dirty. I intend to change the flexi lines with braided items but no rush yet, one step at a time.

ETA: Just sent Automec an email with regards to their brake pipe sets which would save me a lot of time bending and flaring the pipes and just letting me get on with fitting them.
Author:  tr7v8 [ Tue Jan 19, 2010 4:28 pm ]
Post subject:  Re: Brake hard lines
TBH I use locally (normally E Bay) sourced copper & brass fittings. The Automec kit is OK but the one for the TR7 had most lengths over long & I ended up re-making most of them. I normally get a couple of rolls as you'll spoil a few & running out is Very frustrating.
Author:  madrob6 [ Tue Jan 19, 2010 8:05 pm ]
Post subject:  Re: Brake hard lines
Out of interest how long is too long? If it was marginal that I could get away with it I may go for it as it saves on buying all the flaring tools and fittings.

I may try giving Martin Reed a bell as I've been told he can make up the parts and fit them but will have to see if he's willing to just make the parts up for me.
Author:  tr7v8 [ Tue Jan 19, 2010 8:17 pm ]
Post subject:  Re: Brake hard lines
madrob6 wrote:
Out of interest how long is too long? If it was marginal that I could get away with it I may go for it as it saves on buying all the flaring tools and fittings.

I may try giving Martin Reed a bell as I've been told he can make up the parts and fit them but will have to see if he's willing to just make the parts up for me.

From memory everyone was 2-3 inch too long minimum. Enough to be annoying. Flaring tools are so cheap it is worth getting one & a couple of reels of 3/16" copper & some M10 x 1mm unions. This way you can run the pipe, bend it roughly right & flare the ends easier than trying to thread pipe & unions through small gaps.
Author:  David924S [ Wed Jan 20, 2010 9:23 am ]
Post subject:  Re: Brake hard lines
I would agree the only time I had lines pre-made up they were too long by just enough to be annoying, I also agree it is much easier to run line how and where you want it then flare the ends yourself than to try and run pre bent lines with nuts attached, particularly if you are running the lines from front to rear over the transmission without removing it.
Author:  madrob6 [ Tue Jan 26, 2010 2:07 pm ]
Post subject:  Re: Brake hard lines
Oops, it would seem I made a cock up.

I finally managed to pull the pipes that go behind the engine and over the torque tube out but I didn't make note of which pipe was for the front right brake and which one headed for the rear.

I have the front left pipe installed so would I be correct in thinking the pipe opposite this would be for the front right and the pipe situated at the end of the master cylinder is for the rear?
Author:  ket01 [ Tue Jan 26, 2010 7:42 pm ]
Post subject:  Re: Brake hard lines
tr7v8 wrote:
TBH I use locally (normally E Bay) sourced copper & brass fittings. The Automec kit is OK but the one for the TR7 had most lengths over long & I ended up re-making most of them. I normally get a couple of rolls as you'll spoil a few & running out is Very frustrating.


Be careful using pure copper for brake lines. Copper has a tendency to work harden and can crack (ultimately fail under pressure). Brake lines, even when properly supported or clipped, can be exposed to vibration and sufficient movement to cause work hardening. Better use copper/nickel alloy (Kuniffer) as the material is less prone to fatigue failure.

Karl T
Author:  tr7v8 [ Tue Jan 26, 2010 7:50 pm ]
Post subject:  Re: Brake hard lines
ket01 wrote:
tr7v8 wrote:
TBH I use locally (normally E Bay) sourced copper & brass fittings. The Automec kit is OK but the one for the TR7 had most lengths over long & I ended up re-making most of them. I normally get a couple of rolls as you'll spoil a few & running out is Very frustrating.


Be careful using pure copper for brake lines. Copper has a tendency to work harden and can crack (ultimately fail under pressure). Brake lines, even when properly supported or clipped, can be exposed to vibration and sufficient movement to cause work hardening. Better use copper/nickel alloy (Kuniffer) as the material is less prone to fatigue failure.

Karl T

Theoretically maybe, but I've done loads & never had an issue with copper for brake lines. I don't use pure copper for fuel lines as it can react with fuel.
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