rmonckton

I recently took my S4 to the track (it had standard brake fluid in) with dba rotors and ebc greenstuff.

After the first 3 laps my pedal went hard but I could still brake (just had to push harder).

Open the bonnet and I assume the fluid boiled as it had come out the top and was leaking down the side of the breake Reservoir.

I went back after a cool down and the brakes felt really good (except still had fluid leaking after every session on the track).

Now, after the track day driving around at home the pedal feels really hard still and just driving to the shops I noticed it had over flowed again.. (I gave it a couple of firm brake applications)

Is this just bad brake fluid and I should change it? Or is it something else?

Thanks

frank

I prefer Motul 600

zhenya

2nd.

St0lenR

Bleed your entire system out and replace it with some super blue

LCP

...WAY too many of us have had seal problems in our brake and clutch systems after using it.

frank

2nd

O.W. Kenobi

Flush with Motul RBF600.

rmonckton

What does everyone think of the super dot 4.5 fluids??

FixedWing

But I agree with others here that it would be wise as a first step to replace the fluid to remove that possibility.

Leaking fluid ... any signs of seals leaking? Can you see where it is coming from. If you aren't getting the system hot then I don't see how this is the problem for every-day driving.

If you aren't going to be on the track again soon then I would use a standard DOT4 fluid.

Stephen

rmonckton

It is leaking from the top.. where the screw top is.. It has even hit the bonnet and stripped some paint..

I actually have motul dot 5.1 non silicone fluid..

This is ok to use right?

Cheers