05-15-2010, 12:50 AM
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#1
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GX Member
Join Date: Feb 2004
Location: Oklahoma City
Posts: 70
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Why do the rotors warp?
Did we ever figure this out? Is the car too heavy, or the lug nut torque specs too high....?
Factory rotors warped, so my 'ho got GM replacements. Those warped so it got Powerslots. Those warped so it got eBay cheapies. Those warped so it got Duralast Golds. Those are warped.
Are there ANY rotors that will last longer than 12-15 months of daily driving?? No, I don't want the giant brake kit, just a badass stock size.
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2000 Alero coupe
APoC intake
Powerslot rotors
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Aleromod member: THE EARTH IS ONLY ABOUT 6000 YEARS OLD
And these people can vote and drive on public roads....
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05-15-2010, 12:57 AM
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#2
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Parts just wear out, it just happens.
I usually get about 20 to 26 months out of rotors, how hard are you braking? and if your doing stock style rotors, why are you not getting them cut?
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
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05-15-2010, 12:59 AM
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#3
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Captain Funpark
Join Date: Jan 2006
Location: Vincennes, IN
Posts: 7,034
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I think it just happens, especially if you are heavy on the brakes. I just got my front ones replaced not to long ago. Only advice I can give is try braking not as hard and start sooner. It seems to work well for me. The only reason mine got warped the last time was because some idiot in a van slammed on his brakes in front of me for no reason, and we were on a highway. The car shook ever since. Feels good to have a shake free stop.
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05-15-2010, 01:23 AM
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#4
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GX Member
Join Date: Feb 2004
Location: Oklahoma City
Posts: 70
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I'm a cheap ass, so I wait too long and they end up beyond turning.
Also being a cheap ass, I'm a hyper-miler wannabe, so I do time lights & such in order to brake as little as possible. My wife has a Mustang that is 400 lbs heavier, same driving conditions, her factory rotors are 6 years old and work fine.
Is there any benefit to expensive rotors like Brembo & Stillen? Or is it all stopping power with no durability?
__________________
2000 Alero coupe
APoC intake
Powerslot rotors
ARE wheels
Aleromod member: THE EARTH IS ONLY ABOUT 6000 YEARS OLD
And these people can vote and drive on public roads....
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05-15-2010, 01:53 AM
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#5
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Captain Funpark
Join Date: Jan 2006
Location: Vincennes, IN
Posts: 7,034
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Quote:
Originally Posted by AndysGX
I'm a cheap ass, so I wait too long and they end up beyond turning.
Also being a cheap ass, I'm a hyper-miler wannabe, so I do time lights & such in order to brake as little as possible. My wife has a Mustang that is 400 lbs heavier, same driving conditions, her factory rotors are 6 years old and work fine.
Is there any benefit to expensive rotors like Brembo & Stillen? Or is it all stopping power with no durability?
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By that, you mean you wait as long as you can before braking? If that's the case, you probably ARE braking to hard. Our cars aren't the best with rotors. Buying more expensive rotors probably won't help at all.
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05-15-2010, 08:17 AM
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#6
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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Quote:
Originally Posted by cavaliers60
By that, you mean you wait as long as you can before braking? If that's the case, you probably ARE braking to hard. Our cars aren't the best with rotors. Buying more expensive rotors probably won't help at all.
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it means he coasts as long as possible before braking very lightly. (i do the same when i can)
my brakes warp due to temp. almost ALWAYS in the winter one hard brake (due to idiots who can't drive in snow) with cold brakes almost always warps them.
but the other bad thing is, my rotors ALWAYS rust apart. the inner fins and outer rim rust to hell in under a year. . Like redog... i usually get a full year, almost 2 if i'm lucky.
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05-15-2010, 01:56 AM
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#7
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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i must have gotten ridiculously lucky with the random ebay brand rotors and pads i bought 3 years ago. ive gone a little over 40k on some off brand pads, and no name d/s rotors, and just now im going to have to change pads. rotors are fine tho. no warp at alli resally dont know what causes it, but seeing as its happened across many different brands of rotors, im going to assume its something on the car. dont know what, but thats what i would assume.
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05-15-2010, 04:14 AM
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#8
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GL Member
Join Date: Dec 2008
Location: Torrington, CT
Posts: 257
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How much is it to get the rotors cut? My rears are beyond cutting, but I've had them for over 2 years and the way they looked I'm sure they were on my car a lot longer than that (I've only had her for 2~ years). With the cheap price of rotors, is it really worth the time and money? Because let's not forget, time = money.
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05-15-2010, 08:26 AM
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#9
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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Rotors warp easily on these cars????
I have to admit on mine, which only has 26K miles on it I am already wondering what was causing that.
So some of you are just changing them out without even changing the pads?
Obligatory pic:
Maybe you should stop buying Chinese rotors.
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05-15-2010, 08:31 AM
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#10
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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considering the pic... i apparently always buy chinese rotors. Even the Bendix rotors i got, were the same as the one on the left.
So where do I find the ones on the right?
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05-17-2010, 09:37 AM
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#11
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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Quote:
Originally Posted by cherrington17
considering the pic... i apparently always buy chinese rotors. Even the Bendix rotors i got, were the same as the one on the left.
So where do I find the ones on the right?
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All part of our race to the bottom! My OEM rotors do look more like the ones on the left too, but it's impossible to say unless you can compare the two (since it's a relative thing). I'd want to look at ones from NAPA and CarQuest.
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05-15-2010, 12:00 PM
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#12
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V.I.P. Member
Join Date: Jul 2004
Location: Kalamazoo, MI
Posts: 477
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There is a TSB (Technical Service Bulletin) out in regards to adjusting angle of the rotor or something like that on these cars....
It's been 5 years since I've seen it...
Anyone know what I'm talking about??
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05-15-2010, 12:41 PM
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#13
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Rotors don't really warp. It could be your driving style. If I ever got that vibration in my brakes I could make a firm stop and it would go away.
http://www.stoptech.com/tech_info/wp...rakedisk.shtml
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-15-2010, 09:38 PM
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#14
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GX Member
Join Date: Feb 2004
Location: Oklahoma City
Posts: 70
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Quote:
Originally Posted by cherrington17
it means he coasts as long as possible before braking very lightly.
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This.
Quote:
Originally Posted by Cliff8928
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That. Is an outstanding link. Thanks.
I'm gonna get some garnet paper and see how it goes. The local Home Depot doesn't have it, so i'm gonna try a lumber place Monday. I'll post the results, but hopefully its a $10 solution.....
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05-16-2010, 02:17 PM
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#15
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GL Member
Join Date: Mar 2009
Location: westerville, ohio
Posts: 340
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Quote:
Originally Posted by Cliff8928
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is number 6 true on our cars?
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05-17-2010, 12:31 PM
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#16
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Quote:
Originally Posted by lord2heart
is number 6 true on our cars?
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Pretty much, Even with my big 2 piston calipers I never have to add brake fluid throughout the life of the pads. But only the fronts wearing down isn't really enough to turn on the light.
Quote:
Originally Posted by zzyzzx
According to my 1999 Owner's Manual, it's 100ft lb torque. That's what I set them to yesterday. Now that I have had more time to think about it, that's clearly way too high! For every other car I've done, it's usually 65-75 ft-lb, and on only 4 lugs. I can't imagine why a car with 5 lugs would need a higher value.
I haven't checked my factory service manual to see if it gives a different number.
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Factory specs for lug nut torque on most GM cars is 100 FT-LB for 12mm and 140 FT-LB for 14mm.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-17-2010, 02:28 PM
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#17
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GL Member
Join Date: Mar 2009
Location: westerville, ohio
Posts: 340
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Quote:
Originally Posted by Cliff8928
Pretty much, Even with my big 2 piston calipers I never have to add brake fluid throughout the life of the pads. But only the fronts wearing down isn't really enough to turn on the light.
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awesome! just learned somthing new!
do you know what light comes on in the cluster?
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05-17-2010, 02:30 PM
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#18
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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Quote:
Originally Posted by Cliff8928
Factory specs for lug nut torque on most GM cars is 100 FT-LB for 12mm and 140 FT-LB for 14mm.
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Wow! Anyway, do you guys also keep a breaker bar in your car? I doubt that I could get the lug nuts off, even with my lug wrench that I keep in the car (not the one that comes with the car).
For my GF's Subaru it's speed at 65ft lb and my Escort I think 75.
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05-18-2010, 02:29 AM
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#19
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Quote:
Originally Posted by lord2heart
awesome! just learned somthing new!
do you know what light comes on in the cluster?
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The "BRAKE" light... Same as the parking brake.
Quote:
Originally Posted by zzyzzx
Wow! Anyway, do you guys also keep a breaker bar in your car? I doubt that I could get the lug nuts off, even with my lug wrench that I keep in the car (not the one that comes with the car).
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I have no issues at all getting 100 ft-lb lugs off the car... It's nothing for the average person to be able to put a little over 100 lbs of pressure on a lug wrench. And most are over 1ft long.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-15-2010, 04:07 PM
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#20
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GX Member
Join Date: Dec 2008
Location: Norwich CT
Posts: 48
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i went down to advance today to try to get driled an sloted roters but they didnt ave them..... what do i do?
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