porsche3.2

95_993

Usually takes about 1 liter to "flush" brakes . But I usually buy 2 liters just in case.

I like ATE brand Dot 4.

porsche3.2

The Brembo Dot 4 looks like a good buy.

Petza914

I use Motul RBF600 in all my cars and flush it every year using my Motive power bleeder. I can do all 6 cars in about an 90 minutes.

slavie

Just did this few days ago and half a liter is definitely not enough - I used just under 1 liter. I'm sure a power bleeder would have made things faster and easier, but I did it with a MightyVac hand operated vac bleeder as I already have one. No issues, did a 300 mile road trip immediately after and the breaks work great.

kino1161

Slavie,

I also have a MightyVac. You did your brakes with this? Did you just suck the brake fluid out and replace with the same amount? Thanks!

slavie

I did what I do on all cars with the mithyvac - sucked out as much fluid as I could out of the master cylinder (could not get the strainer under the cap to come out, so I let it be), and refilled with new fluid all the way to the top, then proceeded to do the calipers starting with the furthest from the MC (Rear Right), then RL, FR, FL. Bleed each caliper till I see that the fluid has changed color. I tried to do the inner bleeder then the outer bleeder on each caliper and vice versa, did not feel like that made much of a difference.

I got a little over 2 of the Mighty Vac's 100ml bottles out of the MC, and a bit over 1.5 out of each caliper.

Most of my other cars take half a qt of fluid to get the job done so Cayenne was certainly more work. Like I said, I'm sure a power bleeder would make this job go faster, but I have absolutely no issues with how the small Mighty Vac handled the challenge.

kino1161

Thank you.

oldskewel

Just to help maybe attempt to reduce some confusion in what some are writing and others are reading ...

MityVac makes at least two well known products.

One is a little hand-held brake fluid suction thing. I bought one of these about 30 years ago, and it still works (either USA or Taiwan made), although I prefer to do pressure bleeding for my brakes.

The other one is a bigger, ~7 liter, oil evacuation cylinder thing for sucking out your oil, etc. I have that one too, sometimes used to suction out oil, etc.

Both provide vacuum, and I guess in theory would be interchangeable. But they are very different devices.

Rule number 1 for brake fluid flush is to never ever let your reservoir go empty. So for example, suctioning out all your brake fluid and then trying to replace it after the system is dry, well, that won't be fun for anyone.

slavie

I did that once while bleeding brakes... Let me just saw I'm glad I have a habit of test driving vehicles myself first after doing any brake work. Had I just tossed the keys to my SO, I'd be living on a park bench by now - there was NO BRAKES whatsoever. None. Glad I at least had a working parking brake, or else I'd be shutting the engine off while in gear to come to a stop.

So yeah, top off the brake fluid reservoir after bleeding each wheel. This is also applicable even if you have a power bleeder, though just need to make sure you have fluid in there, as running it dry will lend you at the same issue.