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post #1 of 6 (permalink) Old 07-30-2014, 07:40 PM Thread Starter
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Question Brake Issues on 2007 Cobalt

I have a question regarding the brake system on my 2007 Cobalt LT.
The brakes are hanging up, the brake pedal is really stiff with little to no movement when this happens.
I've performed the following:
1) removed and cleaned, re-adjusted rear shoes,
2) removed and cleaned, (all parts) of front calipers
shoes and pads are about 6 weeks old ( less than 2,000 miles )
3) inspected all hoses and metal brake lining
4) replaced the master cylinder, bled all old fluid and replaced with new fluid.
The brakes still slightly hang up, the brake pedal is no longer very still, but now the pedal does not return the whole way out when applied. The pedal can be lifted about 1 inch with my foot and the brakes are then free.
The only remaining system part that I can think of is the booster. Can anyone suggest what might be the problem?
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post #2 of 6 (permalink) Old 07-31-2014, 09:41 PM
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Did you get the problem resolved? When the brake pedal doesn't return all the way, and you need to brake, does it feel like you get any effort from the rear brakes?
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post #3 of 6 (permalink) Old 08-03-2014, 11:06 AM Thread Starter
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problem still remains,
back brakes seem to be working with front while pedal braking,
back brake works fine while using emergency brake,
brake pedal just won't return completely, ( about 1 inch ) after applying
I can easily pull pedal up using my foot to disengage brakes and open the brake light circuit though.
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post #4 of 6 (permalink) Old 08-03-2014, 12:21 PM
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Did you check the return spring on the pedal?

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post #5 of 6 (permalink) Old 08-08-2014, 02:17 PM Thread Starter
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hey just wanted to say thanks for the replies,
the problem has been resolved, at issue was the master cylinder,
brakes working great now ( coby7 where is the return spring ? )
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post #6 of 6 (permalink) Old 08-08-2014, 02:26 PM
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Uh! Eh! Oops! there's none on the pedal, it's inside the master cylinder. Sorry my bad. I'm going to look in to this a bit more and figure this one out.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly

Last edited by Coby7; 08-08-2014 at 02:35 PM.
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