NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   My Damn Brakes! (https://www.nopistons.com/2nd-generation-specific-17/my-damn-brakes-37948/)

Baldy 04-30-2004 07:29 AM

Pads are almost brand new. Once I hit pressure, they stop great, I could lock up all 4 wheels if I want. Maybe I just need to bleed everything again. I'd hate to round off that adjustment nut for the pedal freeplay.



Or maybe I was looking at the manual wrong. Do I need to loosen something before I do the adjustment? I thought that was only for the brake light switch adjustment, but I'm wondering if I misunderstood it.

Nan da yo! 04-30-2004 06:53 PM

" Loosen the booster pushrod locknut and turn the pushrod until the desired pedal height is attained. Now that the pedal height is set, turn the pushrod (the brake booster pushrod) until the freeplay is within the range listed (4-7 mm)."



Did you loosen the brake light locknut and the booster locknut. It sounds like a stupid question, but theres a nut in front of and behind the pedal. After you loosen the rear one i guess you have to toggle the rod until you reach the desired freeplay. Maybe the rod is too far foward? Good luck!

turborotor 04-30-2004 07:09 PM

You must prime the master cylinder before use and installation. I would check for trapped air in the calipers especially the rears.



If that does't work. I would get another master cylinder, I have seen new parts be bad the first time.



C

Baldy 05-03-2004 08:35 AM


Originally Posted by Nan da yo!' date='Apr 30 2004, 06:53 PM
" Loosen the booster pushrod locknut and turn the pushrod until the desired pedal height is attained. Now that the pedal height is set, turn the pushrod (the brake booster pushrod) until the freeplay is within the range listed (4-7 mm)."



Did you loosen the brake light locknut and the booster locknut. It sounds like a stupid question, but theres a nut in front of and behind the pedal. After you loosen the rear one i guess you have to toggle the rod until you reach the desired freeplay. Maybe the rod is too far foward? Good luck!

Ahh, maybe that was my problem. I was only trying to turn one nut. Kinda tough to see what's going on under there, with the door sill jammed in my back.




You must prime the master cylinder before use and installation. I would check for trapped air in the calipers especially the rears.


I did that, and bled the brakes a couple times after that. After installing the new caliper, I bled from the lower bleed point on that caliper. I'm pretty sure I bled everything correctly, and excessively.





Oh, and I think I'm going to have to bite the bullet and remove the reservoir. I noticed today that the level had dropped a tad, so I'm sure it's still leaking. There very well could be a crack in the reservoir somewhere, I'm sure it would be hard to see when installed. So I may have to replace it, and bleed the whole system again. My wife's right leg is getting buffed!

greenfaceman 05-04-2004 04:39 PM

One other thing to check. I have seen many people miss this. There are 2 bleeders on the rear caliper. You have to bleed both to get proper pedal feel.

Nan da yo! 05-05-2004 02:35 AM

Well? Did you adjust that rear rod?



I don't think its a bleeding problem. If it was wouldn't there be no pressure and then it would build up with consecutive pumps?

Baldy 05-05-2004 07:32 AM


Originally Posted by Nan da yo!' date='May 5 2004, 02:35 AM
Well? Did you adjust that rear rod?

not yet, I've been driving the motorcycle lately (can't beat 50 mpg!), so it hasn't been on my mind to try it.

Nan da yo! 05-06-2004 08:42 AM

Can't blame ya... gas is googly moogly expensive.


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