Brake Bleed Needed?

[cgoguen235]

All - I am in the midst of putting my 'rebuilt' calipers from PMB Performance onto my '87 911 Carerra. When I removed the calipers/pads/lines/etc all the fluid came out of the rear brake system (which is what I expected).

I am just fixing the rear brkes I am not touching the front brakes - just calipers/pads/rotors on rear. I plan to do the front at the end of the summer. My question is as follows: Do I need to bleed ALL the brake fluid from the brake system (front and back) or do I reattach calipers/pads/lines/sensor/etc and add fluid to reservior (all the fluid in rear came our when I removed calipers) and pump brakes to pressurize the lines. I plan to do a full bleed/replace when I do the front in late August.

Does this question make sense? Thanks for your sage advice (BTW - I am new to this fixing car-stuff if you haven't noticed - learning a lot though)

[Oh Haha]

Yes, you will need to bleed the entire system. Start with the PS rear, then the DS rear, PS front, and finally DS front.

When bleeding the system be sure to monitor the fluid level in the master cylinder and don't push the brake pedal all the way to the floor as this can push the MC pistons to go past the seals causing an internal leak. Have a helper assist with the job and it will go much easier.

[Hnichols]

Originally Posted by cgoguen235

My question is as follows: Do I need to bleed ALL the brake fluid from the brake system (front and back) or do I reattach calipers/pads/lines/sensor/etc and add fluid to reservior (all the fluid in rear came our when I removed calipers) and pump brakes to pressurize the lines.

Maybe I'm taking your statement too literally, but you do not need to flush the system with new fluid; you only need to bleed, i.e., make sure there's no air in the system. And, yes, you need to bleed all four calipers.

It's not a hard job at all with a pressure bleeder -- well worth the investment in my view.

Good luck!

[patz]

Always a good idea to purge the entire system. Fluid is a wear item like engine oil. Make sure the bleeders are on top. BTDT.

[zippy_gg]

You keep asking the same question New Rotors and Pads - Newbie Question and Advice Needed hoping for an answer you like better???