Brake pipes

Started by Fin, November 2, 2025, 18:05

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Fin

Last year I had an advisory for a warped disc, so I decided to replace discs and pads.
While doing so, I managed to damage a brake hose.
Today, while fitting the hoses, I managed to damage the offside rear and nearside front pipes.
Has anybody had to replace the brake pipes? If so, how much of a pain are they? ie, are they coated all the way along, and how difficult is their path?
Ideally, I'd like to just replace the ends and fit the new hoses. Am I likely to be lucky, or am I looking at complete replacement?
The Sun is out, the sky is blue,
The roof is down on my MR2,
And I\'m grinning, grinning ear to ear!

Joesson

@Fin

Always good practice to keep up to date on the Forum.
As discussed very recently:

https://www.mr2roc.org/index.php?topic=58890.msg910766#msg910766

barchetta_ms

I have replaced the offside front with a new pipe - it was painful, but it is possible

Joesson

Your probably not going to be as lucky as I was.
In the 80' I had a mk 1 escort that required a replacement brake pipe, a front iirc.
I went to a local motor factor, who, of course, could not help, but another customer said he could.
I had the damaged pipe with me. We went to his home/ garage where he produced a roll of brake pipe, bending  and flaring tools and he made the piece for me. No charge.
A rare Good Samaritan!

The Other Stu

To follow up (as Joesson pointed out), I've had rather a hefty bill for mine.

My local mechanic charges £70+VAT an hour and the labour costs were 5 hours to sort in total.
In fairness, that included replacing all 4 hoses as well as the rear calipers (I supplied all of these).

But they had to rebuild the both rear brake lines entirely and partially the front.

Joesson

#5
@Fin said:

Ideally, I'd like to just replace the ends and fit the new hoses. Am I likely to be lucky, or am I looking at complete replacement?
—————————

From the :
MOT inspection manual: cars and passenger vehicles
Brakes
1.1 Condition and operation
1.1.11. Rigid brake pipes

Repairs to the pressure lines of hydraulic brake systems are unacceptable unless suitable connectors are used. Compression joints of a type using separate ferrules are not

 

—————————

That would seem to suggest that fittings using flares formed on the tube ends would be acceptable. Further, the www refers to fittings for car hydraulic brake lines for replacement or repair !


Hawko

Quote from: Joesson on November  3, 2025, 15:24That would seem to suggest that fittings using flares formed on the tube ends would be acceptable. Further, the www refers to fittings for car hydraulic brake lines for replacement or repair !

This was I did on both my rear lines to save dropping the fuel tank and it has just passed MOT without issues. 

My rear lines had already been replaced with soft copper tube that just twisted and deformed when trying to undo from the brake hoses.  The replacement sections are in kunifer, which is much better.  When off the road over winter I will be replacing the complete back lines with kunifer, to remove the joins.  For info replacement back brake lines are no longer available from Toyota, so have to be custom made.
A problem shared is a blame halved

Fin

Actually, most of what I've seen here is quite reassuring.
If the whole lot can be done in 7 hours, and others have done this, I'll give it a go.
I know people who have replaced entire systems etc, it's just not a job I have done myself.
I've ordered a flaring kit and some pipe (copper for now, but I will have a serious look at kunifer), and I am off sick at the moment, so I'll have go on the driveway.
The Sun is out, the sky is blue,
The roof is down on my MR2,
And I\'m grinning, grinning ear to ear!

Fin

Well, I used the pipe that came with the kit, and it was surprisingly (to me) easy.
I managed to form a join using the supplied brass joiners about a foot into both the rear and front pipes.
I now know what a "double flare" is as well.
Every Day is a school day!
The Sun is out, the sky is blue,
The roof is down on my MR2,
And I\'m grinning, grinning ear to ear!

Joesson

@Fin, pleased that worked for you. So what is a " double flare"?

Fin

The kit comes with a spike on a threaded screw. If you just use that, you get a single flare, quite rough and looks like a trumpet. If you use the little disc adaptor thingy first, to bulge the end of the pipe, you get a much smoother end and a "double flare". ???  This gives a better seal.
The Sun is out, the sky is blue,
The roof is down on my MR2,
And I\'m grinning, grinning ear to ear!

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