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Replaced the factory fill brake fluid

This is a discussion on Replaced the factory fill brake fluid within the Focus RS Brakes forums, part of the Focus RS Garage category; Replaced the Ford factory fill with ATE high temp. I was amazed how much air was in the system from the factory. Both front caliper ...

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Thread: Replaced the factory fill brake fluid

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    RS Master chumpracerj's Avatar
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    Replaced the factory fill brake fluid

    Replaced the Ford factory fill with ATE high temp. I was amazed how much air was in the system from the factory. Both front caliper had tons of air.
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    Quote Originally Posted by chumpracerj View Post
    Replaced the Ford factory fill with ATE high temp. I was amazed how much air was in the system from the factory. Both front caliper had tons of air.
    Ouch. It can happen, at least my BRZ was like that from the factory also. My RS will get real fluid pretty quickly anyways.
    -Dave
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    Too many cars.. never.

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    That would explain why my brake pedal feels like crap... By far my biggest complaint with driving the car is the craptastic pedal feel, so I really hope that I have air, lol.
    Zeroescence, mofoRS and Cam like this.

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    Supporting Member Macmorgan's Avatar
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    Quote Originally Posted by chumpracerj View Post
    Replaced the Ford factory fill with ATE high temp. I was amazed how much air was in the system from the factory. Both front caliper had tons of air.
    I find it hard to believe that any car comes new from the factory with "tons of air" in the brake system. I've yet to find my system lacking in any way. Being assembled in Germany, I wouldn't be surprised if the brake fluid used by FoMoCo is DOT 4 from Ate. What did you use to evacuate the "old" brake fluid and how did you bleed the system? If you're using a vacuum based bleeder, it'll not only pull fluid from the caliper but air being sucked past the threads of the nipple. Just a thought.
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    Be careful members when bleeding calipers. Brings back horrible memories of my STi. I would hate to see blue paint melted off from the fluid, just like my gold paint (STi) had done before.
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    Absolutely night and day brake pedal feel after flush bleeding system with Motul at 1500 miles and comparing their new feel during a just finished 2660 mile trip [20.1 avg. fuel mileage] on the road and at several SE track and autox events in 95+ temps.
    Think Germans cheaped out on initial fill fluid?
    Brakes are fantastic now.
    Different size bleeder screws in front and back.
    Before flush, at first EZ track day, after runs, pedal was still sinking slightly with light pressure in paddock after short cool down drives.
    Never hurts to use a good known high temp fluid and bleeding brakes should be a routine.
    Last edited by Rallycross; 08-18-2016 at 09:20 AM.
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    RS Master chumpracerj's Avatar
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    Quote Originally Posted by Macmorgan View Post
    I find it hard to believe that any car comes new from the factory with "tons of air" in the brake system. I've yet to find my system lacking in any way. Being assembled in Germany, I wouldn't be surprised if the brake fluid used by FoMoCo is DOT 4 from Ate. What did you use to evacuate the "old" brake fluid and how did you bleed the system? If you're using a vacuum based bleeder, it'll not only pull fluid from the caliper but air being sucked past the threads of the nipple. Just a thought.
    I didn't evaluate the factor fill I just wanted to replace it with high temp for track use. I have a pressure bleeder but i didn't use it this time. I did it the manual way with the wife pushing the brake pedal. ��
    Last edited by chumpracerj; 08-21-2016 at 05:27 PM.
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    Quote Originally Posted by DocWalt View Post
    That would explain why my brake pedal feels like crap... By far my biggest complaint with driving the car is the craptastic pedal feel, so I really hope that I have air, lol.
    Doc when you bleed your brakes let me know what you find. I am wondering if this is going to be common.

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    RS Specialist DocWalt's Avatar
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    Quote Originally Posted by AceJas View Post
    Doc when you bleed your brakes let me know what you find. I am wondering if this is going to be common.
    Probably won't be a bit. I'm lazy... and I'm comparing to the best brakes I've ever driven, lol. AP Racing brakes from Essex on my BRZ with good pads... Bests any of the proper race cars I've driven.

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    I like the look of those cars.. But what I say when I see one is, sigh.. dog slow machine that's not boosted..

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