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HomeTech Articles > 993 Technical Article:

Pelican Guest Technical Article
Permission to publish this article is provided generously by
Robin Sun at www.p-car.com
Be sure to visit his site for loads of 993 info!

How to flush the brake system

The following procedure were posted on the Rennlist 993/996 discussion board in March, 2001
 

My method - generic
 Posted By: Ray Calvo <porsray@sgi.net>
    Date: Monday, 5 March 2001, at 12:34 p.m. 

 In Response To: How to flush the brake system on 993? (Chris) Contributed by Ray Calvo

1) Pull as much old fluid out ofreservoir as possible with a turkey baster, refill with fresh fluid. 

2) Fill Power Bleeder with new fluid 

3) Hook Power Bleeder to master cylinder 

4) Start at right rear; remove wheel 

5) I built up a drain bottle which had a "tee" in it, with a separate 1/4" or so clear plastic tubing attached to each part of the upper "tee". Each tubing end gets attached to a bleed screw. 

6) Open both bleed screws, drain out a 1/4 pint or so (fluid looks clear with no bubbles). 

7) Close bleed screws, remove tubing, reattach wheel. 

8) Go to LR, RF, LF in that succession and repeat (4)-(7). 

During (6), helps to tap brake caliper with a rubber or wood mallet. 

 

Comments and Suggestions:
John Comments: Hi I have a motive brake bleeder I purchaced from you guys, I want to flush the brake fluid on my 1995 993 c4 which has an electric booster.I have the yellowcapgarage video but they are not clear about my c4.rennlist has a how to article that says I must depressurize the brake system by bleeding the accumulator not sure about this step.
August 29, 2015
  Followup from the Pelican Staff: Not sure, I haven't used that bleeder on your model. Might be a worth a call to our parts specialists or the bleeder manufacturer. - Nick at Pelican Parts  
chris ghiatis Comments: I Have a 1997 993 with an electric motor on the ABS block. I think the motor pressurizes the brake fluid. Will it affect me if I use a Hand power bleeder to bleed my brakes?
July 12, 2009
  Followup from the Pelican Staff: In general, no. But if you bleed the system dry and then try to refill, then you might encounter some ABS problems and have to bleed the ABS system. I recommend leaving the ABS system in place and changing the fluid using a power bleeder, combined with a colored brake fluid (like ATE SuperBlue). - Wayne at Pelican Parts  

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