Brake pipe leak at M/C

[KRL]

I've noticed that I have a slight leak where the rear break pipe connects to the Master Cyliner:


I've tried tightening up the nut and it does not seem to have made any difference so perhaps the brake line has a crack somewhere in the joint.

Last night I started looking at what would be required to replace the rear brake pipe and looks like quite a big job! Lots of things in the way like the gearbox, prop shaft and diff which may need to be removed

Does anyboddy have some advice for doing this job?

[DCL]

You don't mention how long it has been serviceable before the leak - unusual for these to just start leaking unless they've been on and off a few times. You could borrow a flaring tool to put a new flare on it or get your local garage to do it for you. The only question is if you can get enough length - if not you could put an inline joint somewhere.

[KRL]

Thanks for the reply DCL, the car is a 2008 Sigma and I've owned it just over two years. I've changed the brake fluid each year and have not touched the brake pipe joins at all.

I only found the leak a couple of days ago as I had noticed after hard cornering and braking (track days) there was brake fluid leaking from around the M/C. The first culprit I think is the standard AP Cap and I am planning on replacing that with the Racing AP Cap. Then second I noticed this small leak from the rear brake pipe join.

Re-flaring or putting in an inline joint is certainly more appealing than replacing the entire line.

[DCL]

The standard (road legal)cap is OK on track if you resist the temptation to fill it to the max line. Nearer the min mark is fine as it is baffled inside, so it won't suck air on high G. That said, nothing wrong with fitting the racing cap if you swap it back for MOTs.