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Flushing the brake system and... whoops!

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Old Jun 11, 2010 | 10:41 AM
  #1  
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Flushing the brake system and... whoops!

So last weekend I flushed the Motul RBF 600 and put in Amsoil Series 600 using Joe's site, and while doing so I didn't keep an eye on the fluid level in the Motive power bleeder and forced air into the system.

This was while working on the Passenger's side front outside nipple.



I added more fluid to the power bleeder and then bled the Passenger's side front outside nipple and Passenger's side front inside nipple until the fluid ran free of air bubbles. I made sure the reservoir was at max, felt the pedal, put the wheels back on and then took the car for some braking runs. When cold the pedal felt firm and returned with good response. After heating them, they felt good as well.

Am I missing anything?

I've got an HPDE tomorrow, I want to make sure my brakes are good to go.

Last edited by golgo13; Jun 11, 2010 at 10:44 AM.
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Old Jun 11, 2010 | 11:14 AM
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From: somewhere testing various tires, brakes, and suspensions.
Doh.

Was the reservoir completely empty? Did you rebleed the clutch? To be safe, I would do a quick bleed on other corners to see if there is trapped air. If not, good to run.
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Old Jun 11, 2010 | 11:20 AM
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It looked like the reservoir was completely empty, but the clutch side still had Motul RBF 600 in it when I had forced air into the system. It pretty much looked exactly like this:



I didn't to my homework regarding the clutch system prior, so I had no idea that I should have been flushing that part of the system as well. Hindsight is 20/20.

When I get to the track I'll bleed the corners just to be sure. I brought another bottle of fluid for this exact purpose.

Thanks for the response SmikeEvo!
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Old Jun 11, 2010 | 11:26 AM
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^^ Like Smike suggested, if you've got the time I'd do a quick bleed all around.

fwiw; I tend to bleed the rear first then the front - basically starting the farthest away from the reservoir and working my way closer. It works out just fine.

All in all - if the pedal is hard - you're all good.
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Old Jun 11, 2010 | 11:28 AM
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Will do, thanks for the help fellas.

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Old Jun 11, 2010 | 12:52 PM
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That order doesn't look correct. I always bled the inside first, then outside, that way the new fluid moves through the caliper. Not sure it matters.
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Old Jun 11, 2010 | 01:10 PM
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According to the service manual you want to bleed the outside circuit first and then the inside. Also you want to bleed according to the diagram above due to the car's ABS design.
Dan
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Old Jun 14, 2010 | 10:21 AM
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Just an update on this, I got to the track and ran the car with no problems. Turns out being overly cautious when bleeding/flushing the brakes is a good thing.

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Old Jun 16, 2010 | 06:19 AM
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Thanks for the update and you are very right about being overly cautious with brake bleeding!
Dan
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