I'm warping front brakes (update) long - Saab 900 Bulletin Board - Saabnet.com
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I'm warping front brakes (update) long
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Posted by poop deck pappy [Email] (#2012) [Profile/Gallery] (more from poop deck pappy) on Mon, 27 Jan 2014 17:06:00 Share Post by Email
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First, thank you all for the advice and help. I went through the brakes in this order. The car is an 88 3dr turbo.
Checked the tightness of the lugs and made sure my torque wrench was properly dialed. No improvement.
Replaced the pads and broke them in properly. Brief improvement. When the rotors were cold the car shook very little. As the rotors heated up the shaking would get worse. At highway speeds the car would shake so badly during braking that I lost a side view mirror. Even when not braking the car had a slight shake at highway speeds.
Today I removed the rotors and replaced them with a new set of Brembos. I also checked all connections at the hub. Tie rod ends, hub nut itself, slides for the brake pins and lines. Cleaned rotors before install with brake cleaner and recleaned after brake bracket was installed.
The break in for this set of rotors was 10 repeated, 45 mph to 30 mph slow downs without ever stoping to keep the rotors cool and pads off them at a full stop. Next 7 slow downs from 65 to 35 without stoping to insure the rotors and pads didn't cook.
The result has completely cured my shaking problem while braking. The brakes are stopping perfectly with smooth progressive, pull free results. The car doesn't shake at highway speeds and I'm confident with panic stops again.
I have hopes that this set will not warp as quickly. I find it hard to believe I drive harder than the brake rotors can endure.
In the end my problem was warped rotors and only new ones solved the problem.


->Posting last edited on Mon, 27 Jan 2014 17:09:21.

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