help wilwood master cylinder

[DButler]

So I have a 67 camaro with a manual wilwood tandem mast cylinder. The brakes have seemed to stop fine. I fput new custom lines on the car about 2 years ago...well I am putting a new engine in the car and while cleaning under the hood I thought I would check the brake fluid. Well I open the lid...after fighting the screws...after I notice this clouded looking material in the master cylinder...well upon closer inspection it appears it is fine metal shavings...i haven't had any leaks or anything and I'm puzzled where this is coming from...any ideas?? Has anyone else experienced this?

[no go nova]

Only thing I can think of is the master piston is touching inside the hole body?

[DButler]

What do I need to look for to determine this?

[Hydratech®]

What I would do is to yank the MC, wash the thing out conclusively using at least one big fat can of brake parts cleaner spray (inside out / outside in / backwards / forwards), bench bleed it thoroughly with quality brake fluid, re-install it on the vehicle, and then flush the entire brake system out thoroughly by bleeding it over and over as needed until nothing but perfectly clear brake fluid is coming out at the wheels. I would then run the vehicle for 15-100 miles to verify everything is proper - if so, I would then re-bleed the brake system again (and again) as needed to make sure all of the contaminants were flushed out of the brake system completely.

Or? Maybe the MC is toast, and what you are seeing is the seals / MC pistons / MC bore wearing excessively and spitting up "stuff" back up into the fluid wells.

The only other thing that comes to mind is that you may have replaced the brake pads at some point, and did not open the bleeders up at the calipers when pushing the MC pistons back inward (like you are supposed to), which then pushes all the (muck) from the calipers and brake lines back up and into the MC fluid well(s).

[DButler]

Thanks for the response. I did use this master cylinder on my previous brake setup before switching to c5 brakes all around. However, when switching to the c5 brakes I installed new brake lines and flushed and bed the entire system (maybe 3 years ago). I called wilwood and of course they had no clue and have never seen such. The car is twin turbo and at one point before I built a heat shield the master cylinder was getting warm from the downpipe but the down pipe was wrapped with insulation so it wasn't just bad hot. Not sure if this may be part of the probelm...i will try flushing the system to see what it does as mentioned...i want to add that on the bad bowl of the master cylinder the small black cap that's pops over the bore that has an arrow pointing forward was popelped off and laying inside the bowl...not sure what caused this but the front and back both have the cloudy metal substance.

[DButler]

If the mastersylinder was going bad would the car still stop fine?