My rotors are warped past the annoying point. No autocross or track time. Just normal (for a Vette) driving. Has anyone had these replaced under warantee or is this just a wear item and we are stuck replacing them?
Thanks!!

 

Dealer turned my stock rotors. It has not returned.

Eric

 

Happened on my 00 coupe at 6,000 miles, on my Z06 at 9,000 miles and sorry, but you are SOL. Your brakes carried a 12,000 mile warranty and you are beyond that.

Is pretty cheap to shave the rotors though. Any brake shop could do it for about $150.

 

It doesn't matter how well you treat them. The dealer will turn them. I have had 3 c5's and had them all turned once. It never warped after each fix. I don't get that. You would think they would warp after material has been removed.

 

Turn rotors for 150 $......ouch. you can buy new ones for much less. :eek:

 

My local dealer is turning mine at 18,000 on a 2001 coupe, that I didn't buy there.

 

Just got off the phone with my service manager (never thought I would have one of those...) and he said he will turn them for nothing.
Never would have even thought to ask if it wasn't for this forum.
Thanks!!!

 

They probably warped because the factory tightened the lug nuts too tight. On of first things I did was lossen every lug nut and tighten with a torque wrench.

The number one reason rotors warp is overtightening/uneven torque with a impactwrench !

 

I thought mine were warped, turned out they were cracked. Dealer replaced the cracked one for free, I bought the other front so they'd both be new.

Watch for overtightening. I took my wheels off last weekend, all were about 100ft-lbs, except for the left rear wheel, which must have been 200ft-lbs. Damn dealer must have used an airgun on that wheel :mad, because I could barely get them off.

 

MIne were warped at 3K miles and I don't ever drive hard :blueangel:

 

Mine also warped at about 3000 miles on my 01. I am a prety tame driver (as far as the brakes are concerned)

 

They can also warp if you get water on them when they are hot.

Yes it could happen from hitting a puddle of water.

Could also be from washing the car after a drive and spraying the rotors when they are still hot.

 

Use them harder and the problem will go away. I have 21K on my 97 and have never had a warped rotor even though I am on my second set of rotors and have 7 sets of almost worn out pads in the garage.
Bill

 

Doesn't seem to be any rhyme or reason to the warping problem. I've got several hpde track events on mine and have never had a problem. Always use a torque wrench.

 

Found this in the service manual http://corvette.homeip.net:9001/servlets/SMYearSel

Pulsation

Important
Brake pulsation is often caused by factors outside customer control. In these instances, the repair is covered under the GM New Vehicle Warranty.


Brake pulsation concerns may result from two basic conditions:

Pulsation is caused by brake rotor thickness variation. Thickness variation causes the piston in the brake caliper to "pump" in and out of the caliper housing. This "pumping" effect is transmitted hydraulically to the brake pedal.
Thickness variation on a new rotor will be virtually undetectable. But if the rotor (as installed on the vehicle) has lateral runout, it is likely that thickness variation will develop. Pulsation caused by thickness variation will develop on new vehicles when the tolerances of the hub and rotor stack up with lateral runout in excess of .08 mm (.003 in). Pulsation that is the result of excessive lateral runout usually develops in 4800-11300 kilometers (3000-7000 miles). Thickness variation can be induced when uneven torque is applied to wheel nuts (lug nuts). Improper wheel tightening after tire rotation, spare tire usage, brake inspection, etc. can be the cause of pulsation. Again, it usually takes 4800-11300 kilometers (3000-7000 miles) after this event for the condition to surface. The owner or driver does not usually make the connection between the service event and the awareness of the pulsation. The proper usage of torque wrenches and/or torque sticks (torque limiting sockets) will greatly reduce or eliminate the pulsation conditions after wheel service events. The improper use of impact wrenches on wheel nuts greatly increases the likelihood of pulsation after wheel service.
GM highly recommends the use of on-car brake rotor turning as a method of eliminating the stack up of lateral runout which is a potential source of brake pulsation. GM has identified superior equipment through testing and evaluation. The *Pro-Cut PFM900 will consistently deliver machined rotors that meet GM specifications (lateral runout less than .080 mm (.003 in) and is the only on-car brake lathe that is currently recommended by GM. The use of this on-car rotor turning technology has proven to significantly reduce the repeat occurrences of brake pulsation.

*We believe this source and their equipment to be reliable. There may be additional manufacturers of such equipment. General Motors does not endorse, indicate any preference for or assume any responsibility for the equipment from this firm or for any such items which may be available from other sources.

The following are examples of pulsation conditions and reimbursement recommendations:

If a customer noticed the condition after 4800-11300 kilometers (3000-7000 miles) and it gradually got worse, normally the repair would be covered. The customer may tolerate the condition until it becomes very apparent.

 

It seems to me that warping could also be caused by sitting on the brakes
at a light after hard use. Some people seem to experience warping time and
again even with properly torqued lugs. C5 brakes get much hotter than
your standard honda, as they use a harder brake pad and people use them
more aggressively. If your brakes are hot, don't stand on the brakes while
the car is stopped or they will cool unevenly and warp. I try to be conscious
of this and have never had a problem. Also you can wreck your parking
brake by setting it while the brakes are hot. They can fuse to the rotor.

l8r
Aaron

 

I will sell my stock unwarped rotors to anyone who is interested....

Hmm 150 to turn one........... How about $400 for all four shipped.

hehe

Seriously how much do these go for.

33,000 miles never a problem.

 

Last time I bought some they were about $55 each shipped.

 

I used 3 sets of stock rotors in 12k miles, they warp very easily and don't count on them being replaced under warranty. :rolleyes:

 

I meant all four, not just one.