Leaking Master Cylinder And Booster

[SMG_473]

Hi guys,

I own an ex NSW chaser 2011 FG XR6 Turbo fitted with 4 pot Brembos and pbr combo.

A few days ago, I decided to fit braided brake lines and changed the brake fluid with AP Racing DOT 5.1.

The next day I noticed the paint on the brake booster is pealing off right where it attaches to the master cylinder.

I noticed reduction in braking performance and a constant hissing noise while driving.

I can't really believe that this has happened after a brake fluid flush.

So I guess its time for a new booster and master cylinder.

Can anybody comment on the cost of repair and the extent of damage???

[boost69]

Is it still under warranty?

Even if it's a couple of months out, they might still honour your warranty...

No harm in asking...unless they start blaming the braided lines etc...

Though the braided lines would also have less "flex", is there chance the reservoir might have overfilled somehow?

[SMG_473]

Hey boost69,

The car has been out of warranty for more than 2 years.

It didn't even have warranty when I picked it up from the auction.

Never had an issue with it until now.

well, I filled the master cylinder reservoir to the max dot indicated on it. I didn't overfill it.

But I guess it could have overflowed because of less flex in the braided lines.

There was no sign of leakage until the next day.

I also guess that I might have applied to much pressure on the brake pedal while I was bleeding the brakes which caused the master cylinder to leak internally into the brake booster.