rossos2k

Hello all.

Decided to bleed the brakes on my car last night. Little background on my car. its a 92 with 45,000 miles on it. I had the clutch bled by a shop and they noted that the fluid was nasty and I should consider a full flush asap.
I printed out the DIY from this site and I have the book.

My trouble is this.. I was unable to get steady good flow from any of the caliper nipples. I bled all 4 corners 5-6 times, including removing nipples and cleaning them out. My pressure bleeder was pressurized to 20lbs. I did eventually see clean fluid at the right rear caliper and the brakes "feel" better. But the lack of flow causes me concern.

Fluid in the lines is most likely from the factory as the bleed nipples on all 4 corners of the car still had black paint on them. It seems as if the rubber caps did as well.


Thoughts?

Vandit

Did you clamp off the overflow line at the resevoir?

jellonailer

Don't think you can get 20 psi if the overflow hose isnt clamped unless thats boogered up. I forgot to clamp mine last week and it wouldnt take 3 lbs.

Do you have trash in the bottom of your fluid reservoir?

FlyinTomato

bleeders screws on the calipers loose enough?

alexjc4

I've bled the brakes on a few 964s now and they all had slow flow on the rear caliper nipples. If the pedal is hard don't let it worry you imo.

rossos2k

overflow tube was clamped. Bleed nipples were removed, blown clear with air prior to bleed. I also tried to bleed with nipples removed and still had slow flow. Perhaps its just the way these cars bleed due to all the stuff that is in line between the reservoir and the calipers.

alexjc4

Yeah sounds like my experience - it seems its just "how they are".

It would be interesting to see how the rears bleed with the proportioning/bias valve removed or gutted.

John McM

Question. for some reason I thought we needed a 'Hammer' to bleed C4 brakes. Is that not correct?

alexjc4

Nah, you don't need a hammer for the brakes. You can use a hammer to do the 4wd slave cylinders but you don't have to.

John McM

Great. Another task I can do in my garage. I just need to get a power bleeder.

964Andrew

Can you elaborate? Is there an other way to bleed all slave cylinders?

Thanks!
Andrew

RicardoD

Look here:

https://rennlist.com/forums/964-foru...procedure.html

Mixter

I followed this diy and bleed all 13 nipples without any diagnostic tools and used my air tool compressor with some clear tubing and a modified cap to pressurize the brake fluid reservoir. To bleed the 2 diff locks I used the poor (or cheap) man's way, using the manual lock switch on the console. It took me an afternoon and I used 2.5 litres of "Pentosin Super Dot 4" brake fluid for all 13 bleeds. The fluid from the clutch slave was the dirtiest by far. It helps if you have someone to turn the manual lock switch while you're bleeding the one diff lock that is under the car. The second diff lock bleeder can be reached from the rear wheel well on the passenger side and you have easy access to the man lock switch through the passenger door from there.

964Andrew

Good to know.

Thanks!
Andrew

newsboy

I seriously doubt that you had "Factory Brake fluid" In your car. Brakes need to be bleed every 2-3 years, more often with track use, to prevent moisture buildup and corrosion. When I bleed mine, it takes 3-4 minutes, to fill a pint bottle at 20 lbs. pressure, at any of the bleeder screws.