Another late impala (2007) with warped rotors.

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Another late impala (2007) with warped rotors.

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Chevrolet Forum >> Chevy Cars >> Impala >> Another late impala (2007) with warped rotors.

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Another late impala (2007) with warped rotors. - 8/26/2008 2:57:55 PM

Timmay2

Posts: 1
Joined: 8/21/2008
Status: offline

I''ve looked online and it appears there are alot of people whove had rotors warp in as little as 7,000 miles.

I just picked up (out of state) a 2007 impala with 25,000 miles. On the way back, i noticed when i had to brake firmly the front end shook violently.

Dealers say they dont warranty brake rotors and informed me the pads arent even stock. (What car needs pads before 25,000 miles?!?!) customer care denies knowing of the issue, and they pretty much ignored me when i said i just bought this "Certified" car.

Anyone have suggestions on dealing with them? I can maybe understand if the previous owner rode the brakes hard, but im finding others out there with the same problem on very low milage cars.. and to top it off this was sold as certified.. So at least if certified it shouldve been inspected and repaired before sale, right?

Am i wrong to think this is their problem?

I''m trying to compile a list of known failures, so if you have a late model impala feel free to add to this.

Failure at:
19,000 miles
http://www.carcomplaints.com/Chevrolet/Impala/2007/brakes/warped_rotors.shtml

Failure at 21,000 miles
http://au.answers.yahoo.com/question/index?qid=20080514195904AAYbjtC

Failure at 7,000 miles is the earliest, but there are multiple complaints.
http://www.aboutautomobile.com/complaint/2007/CHEVROLET/IMPALA

Failure at 19,000 miles
http://chevroletforum.com/m_73317/tm.htm

Post #: 1

RE: Another late impala (2007) with warped rotors. - 8/27/2008 1:18:36 PM

rbarrios

Posts: 250
Joined: 2/1/2007
Status: offline

Ive heard the same stories about Impalas and trailblazers... that the rotors are junk..........BUT.....
We have a 2007 Impala and a 2003 Trailblazer........

03 Trailblazer... factory rotors have never been turned. Still has factory rear pads.. fronts were changed at 77,000 with about 20% pad left. and changed at about 125,000 with about 50% pad left... (I thought they needed replacing... but was very wrong. I went ahead and replaced pads in the front anyway... I had everything apart.. so why not..... Ill soon hit 127,000.

07 Impala. No problems with brakes. no pulsating, no nothing.. I just changed oil last night... it has 21,018 miles. (on a side note.....at 21,018, Oil has only been changed 4 times since we got the car).

I think many times.....its the way people drive. very aggressive.

(in reply to Timmay2)

Post #: 2

RE: Another late impala (2007) with warped rotors. - 11/27/2008 3:25:25 PM

xyzzyx

Posts: 2
Joined: 11/4/2008
Status: offline

Just a comment from a newbie here.

I had the same problem with my 2003 Monte Carlo SS (which was "certified used GM"). The dealer turned the rotors and replaced the pads under warranty (because the pads were impacted by the bad rotors). When I asked why they would go bad after only 18K - he explained that the brakes would heat up after slowing down from highway driving and then the car would splash through cold water on the exit ramp (northern states snowy weather). After a few times of this happening - the rotors will warp.

My wifes car (2006 Bonneville GXP) - did the exact same thing at 25K (less highway driving). A different dealer did the same thing to my wife''s car and also chalked it up to warranty work.

After this happened a second time to the MC at 30K - I switched my car to NAPA rotors and ceramic brakes. Not the finest brakes in the world but 90K later - no problems and only minor brake dust.

I think GM is just using cheap quality rotors and pads and they are affected easily by fast temperature changes - thus warping. I wonder if most of the warped disc problems are in the colder climates?

I fully expect my 2008 50th Anniversary Impala (which I love) will be also be getting new brakes in the near future.

(in reply to rbarrios)

Post #: 3

RE: Another late impala (2007) with warped rotors. - 11/29/2008 12:45:34 PM

SLJ2137694

Posts: 73
Joined: 4/30/2006
Status: offline

Repeat brake pulsation is usually caused by rotors that have some run-out in them when mounted. This run-out is caused by incorrect wheel nut torque, rust/dirt between the rotor to hub interface, etc. This run-out causes the brake pad to wear the rotor and cause thickness variation in the rotor which causes the caliper piston to go in and out on a brake apply. This piston movement feeds back as a pulsation. ALL GM Dealers have a comprehensive TSB and the special tools required to stop this problem. It is not poor quality rotors causing this.

< Message edited by SLJ2137694 -- 11/29/2008 12:47:17 PM >

_____________________________

Steven L Jones
Retired and Loving It!!!
33 years with General Motors Product Service Engineering.
A.S.E. Certified

(in reply to xyzzyx)

Post #: 4

RE: Another late impala (2007) with warped rotors. - 12/1/2008 8:32:14 PM

mightydog4805

Posts: 78
Joined: 3/11/2007
Status: offline

my mechanic told me to avoid hitting puddles when it is raining because when cold water hits hot brakes they tend to warp more.

i had the same pulsing feeling before I had my 2004 fixed. I had to replace the whole hub assembly too...that was a really nice bill

(in reply to SLJ2137694)

Post #: 5