Disappearing Brake Fluid Porsche 951 RennsportKC

Had this little 951 come into the shop awhile back to diagnose a missing brake fluid issue. No apparent leaks that they could find, so I took a stab at it. There are 2 places brake fluid can disappear and you won’t notice. One is a brake master cylinder leak into the brake booster, and the other is the clutch master cylinder leaking into the carpet. We had a clutch master leaking.

By looking under the dash, you can see a stream of wetness above the clutch pedal.

And what it looks like from below.

Stuck underneath all that mess is the clutch master. It is critical to replace the clutch master, clutch slave, and the hose that connects the two all at the same time. If you don’t, the next weakest link will fail shortly there after.

And the clutch master out of the car.

Then it was time for the clutch slave. With the starter out of the way, you can see this slave cylinder has been on here a long time as well.

As you can see from the rubber bellows, this slave would have failed very soon.

And going back together with new cylinders and mounting hardware. Throw the rusty nuts and bolts away.

And bleeding the system down. And away she goes!