S2000 Under The Hood S2000 Technical and Mechanical discussions.

DIY brake Bleeding

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Old May 28, 2009 | 11:59 AM
  #101  
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This past weekend I just changed my fluid out and added SS lines as well. I am a little disappointed in the response time for my pedal to fully grab. The feel is linear just a little too long. I am thinking that I may have some air in the system but I am not sure because from what I have heard, if there is air in the system the pedal will continue to depress even further. Do I have to bleed the clutch fluid as well or the ABS. I was reading the DIYs and it doesn't seem to be the case but not too distinct of a reference in this matter.

I used a bleeder hose and pumped until the new blue fluid came out, the only problem was that the nipple that attached to the bleeder screw was not that tight of a fit and there were small bubbles coming through. The master cylinder never went below the minimum level requirement and I kept filling it up. I have checked for fluid leaks and a loss of fluid level in the master cylinder and everything looks fine.

Any suggestions? Thanks.
Old May 29, 2009 | 04:08 AM
  #102  
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So for Right Hand Drive cars, ie Japan, Australia UK. We would do the brake clockwise?? Opposite of LHD?? Since our brake master cylinder is at the opposite corner....
Old May 30, 2009 | 09:07 PM
  #103  
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OMG this is sooo slow!! (Could be just my car...)

I started at 1PM... and now is 3 PM!!! and I've just finished one wheel....

Does it matter how many turn I loosen the bleed nipple? Right now it's half a turn.
Old May 31, 2009 | 02:01 PM
  #104  
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So I decided to go ahead.. Mine is Right Hand Drive. Did RF, LF, RR and LR.

I think it's far from what I would call, Quote: "You'll have such a great brake pedal from the gravity bleed it will feel like the pedal is welded to the car smile.gif
" how hard can Assisted Brake with ABS feel?

While I was bedding in the brake pads, on maximum pressure, ABS kicked in and I found my brake pedal is touching the firewall.

I used Billman's method of gravity bleed. while bedding the pads in, and he said the most solid pedal . . . Errr... is it me.... or I'm under the impression most assisted brake system in automotive won't be as solid as a direct master cylinder => caliper...

and while I was bleeding the fluid, I did see some dirt or stuff flowing out from the caliper!! It's not air but particles or dirt...
Old May 31, 2009 | 02:48 PM
  #105  
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I'm probably gonna get lambasted for this, but over about 15 years of tracking a pretty-fast 240Z and a few years of tracking my stock S2000...

I've never had issues with pedal feel via this one-man method of brake bleeding:
Flexible tube from the stock bleed screw to a catch bottle on the ground.
Loosen bleed screw.
Pump pump pump at the brake pedal until the end of the reservoir being depleted is nearly empty.
Fill reservoir with fresh fluid.
Repeat until I see fresh fluid coming out of the caliper, then a few pumps more for good measure.
Tighten bleed screw.
Repeat for the other corners of the car.

Also, fwiw, I get better performance out of off-the-shelf DOT 4 than I got out of harder-to-find and more-expensive ATE Superblue.

Cheap, quick, easy.
Old May 31, 2009 | 02:49 PM
  #106  
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ATE: Awesome, I was at Buttonwillow (100 to 40/60 turns) this yesterday. And this is my second track day on this fluid as well as some heavy street driving and autox. And the fluid held. and I can't say same for the AXXIS pads or rotors.

The process from a mechanics perspective, is a good process. Gravity bleeding is for exactly that though, bleeding, NOT getting air out. It seems, from my experience that the gravity bleeding seems to work but but for cars with poorly designed braking system you have to "flush" the system out. using the 3 man method.

Also, I think personally that brake bleeding "enhancements" like "pumps" are a waste of time.
Old May 31, 2009 | 04:44 PM
  #107  
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Could some one answer the question about ABS? When ABS kicks in, could you press the brake pedal all the way to the fire wall??

The thing is when I brake ultra hard, ie ABS came in, the brake pedal could touch the firewall. Well ABS kicked it before the brake pedal touched the fire wall, but once ABS came in, I was able to press the pedal harder and deeper and touched the fire wall!!!
Old May 31, 2009 | 05:06 PM
  #108  
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Why would you continue to press harder on the brake PEDAL after ABS took over?
Old May 31, 2009 | 06:44 PM
  #109  
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Because some guy said Gravity Bleed will make ur brake pedal feel like rock solid....

But you didn't exactly answer the question....
Old May 31, 2009 | 06:48 PM
  #110  
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I can't answer the question, because I never tried to mash the brake pedal harder after ABS was invoked.

I'm going to the track next Mon/Tue, and *would* try it, but my ABS has been awol for the past year or so.

I actually kinda prefer not to have it...

Oh yeah, WTF is a brake "PADDLE"?



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