Warped rotors = rythmic steering wiggle? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-18-2007, 11:53 PM   #11
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I'm going to order some stuff tommorrow. I'm going to start with brake lines, caliper inspection for leaks, and new rotors and pads. We'll see how it goes. I doubt the problem will totally go away.

It needs a left axle too, I've found. I'll be ordering that as well.

GM'* H-body repair manual set is GREAT.
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Old 01-20-2007, 02:23 AM   #12
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Adjust the rear brakes manually while you're working on the car. The self-adjusters don't self adjust, and making sure you have contact with the rear brakes makes a big difference in brake feel.
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Old 01-20-2007, 02:31 AM   #13
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Something to do If the brake repairs don't eliminate the pull to the right. Check that tire pressures are equal, then swap left for right wheel. If it pulls to the left, it is the tire.
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Old 01-20-2007, 12:21 PM   #14
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Great advice here. I 100% agree with manually adjusting the rear brakes. Never overlook that.

In addition, the tire swap is a great troubleshooting step. But not if you have directional tread.
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Old 01-20-2007, 01:22 PM   #15
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After adjusting the rear brakes manually on my car after noticing essentially no wear at the 100k mark, I have to wonder if the front rotor warpage problem on our cars is due to the front brakes doing all the work.

Last time I rotated the tires I pulled the rear drums and at last had a nice, even wear pattern on both the drums and shoes. As I said, the difference in brake feel is very noticeable.
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Old 01-20-2007, 01:25 PM   #16
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Quote:
Originally Posted by Bob Dillon
After adjusting the rear brakes manually on my car after noticing essentially no wear at the 100k mark, I have to wonder if the front rotor warpage problem on our cars is due to the front brakes doing all the work.

Last time I rotated the tires I pulled the rear drums and at last had a nice, even wear pattern on both the drums and shoes. As I said, the difference in brake feel is very noticeable.
That was exactly my observation last year when I warped my second set of rotors. I replaced all the rear components and adjusted them properly. Braking is greatly improved, and no sign of warping since.
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Old 01-20-2007, 03:05 PM   #17
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I adjusted the tire pressures immediately after getting the car. All 4 are at the correct pressure.

I've got a recent receipt for new shoes, drums, and cylinders, plus the usual adjustments/lube on the rear brakes. I hope they aren't messed up already :( I'll take a look though. It feels the same as my mom'* Buick under braking though, and I know her rear brakes are in correct order.
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Old 01-20-2007, 03:23 PM   #18
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Quote:
Originally Posted by Andx0r
I adjusted the tire pressures immediately after getting the car. All 4 are at the correct pressure.

I've got a recent receipt for new shoes, drums, and cylinders, plus the usual adjustments/lube on the rear brakes. I hope they aren't messed up already :( I'll take a look though. It feels the same as my mom'* Buick under braking though, and I know her rear brakes are in correct order.
The problem may just be that they threw the parts on without checking rear brake adjustment. All you have to do to check this is remove the rear tires, pull the brake drum off (E-brake off, please. ) and check to see if there'* a wear pattern on the drums and shoes.

If not, just move the adjusters out so you can hear the drum barely scraping against the shoes. Now, put the wheels back on and be sure to torque the studs. You're done.

Have a beer!
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Old 01-20-2007, 08:25 PM   #19
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Here'* a new one:

Just went to pick up some carryout for dinner. On the way home, I dropped the hammer twice and got just a smidge of wheelspin. Both times my brake warning light/dinger came on, and then went off again. what the hell? I'll check the fluid tommorro when it'* light out, because it leaks.
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