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Pontiac Bonneville Brakes

10 messages,  Last post on Oct 30, 2007 at 6:07 PM

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What is this discussion about? Pontiac Bonneville, Brakes, Sedan

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#6 of 10 93 Bonneville spongy brake pedal by myer1 Jul 10, 2007 (6:41 pm)
The orignal master cylinder started leaking in the brake booster. Replaced the master cyl and flushed brake hydraulics. After a few days of driving the brake pedal would slowly go to floor. Replaced master cyl again and bled again and again using vacuumn, brake pedal with engine running and not running nothing worked, still same problem. I feel the master cyl is bypassing internaly but not sure. Anyone else have this problem? The car only has 40,000 miles and no rust or leaks at calipers or wheel cylinders. Replies to this message: myer1 (Aug 01, 2007 10:45 am) imidazol97 (Aug 01, 2007 12:31 pm)
#7 of 10 Re: 93 Bonneville spongy brake pedal [myer1] by myer1 Aug 01, 2007 (10:45 am)
Replying to: myer1 (Jul 10, 2007 6:41 pm) The problem was finally cured after many postings and phone calls to dealers. The car was taken to a gravel parking lot and made a couple of panic stops to engage the ABS. End result is that the Bonneville now has a full brake pedal with no fading of the pedal. The ABS must have gotten an obstruction on the first master cylinder change. Replies to this message: imidazol97 (Aug 01, 2007 12:31 pm)
#8 of 10 Re: 93 Bonneville spongy brake pedal [myer1] by imidazol97 Aug 01, 2007 (12:31 pm)
Replying to: myer1 (Aug 01, 2007 10:45 am) Thanks to you for coming back and telling us what you found. You probably have helped someone who will remember this post or find it by searching for spongy brake in the future.   I would have thought the ABS check the system does where it cycles the brakes at each start up of the motor would have burped the air out!
#10 of 10 Brakes on 03 Bonneville by afbryant Oct 30, 2007 (6:07 pm)
I have a 2003 and I am thinking of putting on brakes myself.,front and rear.. Have any of you done this yourself? Any special tools needed? Any info would be appreciated I do have general knowledge of putting on brakes but on up to a 1990 model that I owned.

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