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Soft Brakes?

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Old 03-12-2005 | 06:51 PM
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Default Soft Brakes?

I just changed the brake pads on my Brembos for an autcross race tomorrow to Cobalt GT-Sports pads. When I went to bed the pads the brakes were really soft and never got better. Do I have to bleed the lines if I just change pads? I changed to Nismo pads for daily driving and this wasn't a problem. How is it possible for air to get in the lines from compressing the pistons? Any tips, my race is in 12 hours. Thanks.
Old 03-12-2005 | 07:50 PM
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Its the first thing I would do.
Old 03-12-2005 | 08:50 PM
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^yep, bleed the lines whenever you change your pads
Old 03-12-2005 | 09:21 PM
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Will do, thanks.
Old 03-14-2005 | 05:19 AM
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Did it fix it? You sure you got enough heat in the pads during bed in? Did you do 10 stops then rest and do 10 more? I bet race pads take a good bit of heat to get real grippy.
Old 03-14-2005 | 08:59 AM
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Bleeding the brakes made it a lot better, but it still would get pretty soft going into some of the turns.

King Tut - I bedded them correctly and they grip really well, the pedal was just soft, like I had air in the lines. I plan on completely flushing my fluid and putting new in so we will see if that makes a difference.
Old 03-14-2005 | 11:26 AM
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Originally Posted by mbonanni1856
Bleeding the brakes made it a lot better, but it still would get pretty soft going into some of the turns.

King Tut - I bedded them correctly and they grip really well, the pedal was just soft, like I had air in the lines. I plan on completely flushing my fluid and putting new in so we will see if that makes a difference.
Try following my bleeding instructions here: http://www.zeckhausen.com/bleeding_brakes.htm. You can skip over all the apple pie and motherhood stuff about why it's a good idea to bleed brakes. Focus on the little tricks, such as using the two-person method and using a rubber mallet to tap the calipers in order to free trapped bubbles.
Old 03-14-2005 | 11:40 AM
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Good write up, but ther is one more thing that I have learned with the 350Z. For some reason, bleeding the brakes while the car is running has a MUCH better result than when the car is not running. When I changed my lines, I bled the brakes 3 times with the car turned off and the pedal was still soft. I bled them once with the car running and the pedal was hard as a rock.
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