I brought my car in last month with a shutter when hitting the brakes at highway speed. New set of rotors/pads and one month (1K) miles later it's shuttering even worse. Is this a common problem? I have 8K miles left before my 36K brake warranty expires. If they "really" changed the rotors then there must be something else going on here.

Anyone else experience this? What could be other causes?

 

Is that shuttering or shuddering??

j/k

 

I'll bet they just machined them and not replaced them. They are warping when they get hot. Does the shuttering become worse the longer you drive? Is it not as bad in the morning?

 

Yes, I just had mine done & they only machine the rotors under warranty, go back & get new rotors before warranty expires!

 

ya they just turned your rotors. thats ok for most cars, but not for high performance cars. you need to replace rotors. machining them is the easy way out. working at a tire and auto repair shop, i know from experience, you cannot do that to high end cars. not the the G is such a "high end" car compared to MBZ, BMW etc, but the performance is similar and for cars such as those, we do not machine the rotors, we simply replace them with dealer parts and high end pads. while your there see if you can get some better pads than those crappy oem ones. maybe nismo makes some? hawk is good for brake dust, but for stopping i recomend akabono. they are amazing in my opinion...

 

There is no way they are getting me from 27K to 36K without putting new rotors on this car. I don't even think it's been 1K miles since they did this brake work.

 

This sounds like a mechanics scam to me, why is it any different than any other rotor? I'm not buying this theory! Nismo makes pads that they claim to be "rotor friendly" whatever that means.

 

This is no scam. When your brake pads wear, they also wear the rotors down. when you resurface the rotor, you are taking material off of it to make it smooth again for the new pads. This makes the rotor slighly thinner which mean you have less material to dissapate the heat and makes the the rotor susceptable to warping.

 

When I had my 5 series, it took 4 sets of pads and rotors before the brakes worked correctly. My Indie, who is beyond knowledgable and trustworthy, did the installs. Within 2K miles I would have had warped rotors, and I never drove the car hard.

Also, I know from experience that Volvo and BMW do not allow for the rotors to be cut. Replacement is mandatory, by both dealers and indies.

 

When I first took my car in for brakes (Before the warranty!), they told me I needed rotors and pads. By the time I took it back to the dealer, the warranty was issued for the brakes and they replaced both. For my second set of pads and rotors, under warranty, they machined the rotors and replaced the pads.

Funny how when they thought I was paying for it, I needed pads and rotors and when they were paying for it, I only needed pads and machined rotors.

Hmmmm, I wonder.....

 

Exactly! And did you have any problems with just turned rotors, my guess would be no!

 

No you won't untill they get hot. If you could turn them while they were hot, you wouldn't have the problem. When they get hot, they warp, that's when the shuddring starts I'll bet.

 

Some useful reading material.
http://www.stoptech.com/whitepapers/...otors_myth.htm
They do not warp when they get hot. I had my brakes glowing after track use on different cars, including stock and aftermarket rotors. I always wondered why I do not get that dreaded "warp" problem. This is explanation.

 

That's from the first line of the article. I'm not talking about racing, I'm talking about your average shmo.

I do not disbelieve you! But had this happen on my Ford 6 times! Each time I would get the vibration I would take it in and have the rotors turned. Each time they would be fine for a week. Each time after a week the vibration would come back. Each time I would replace the rotors and the problem would dissapear untill it rained hard and I went through some water over 6" deep. The rotors would warp and the cycle would start over.

That was a really good paper from StopTech, thanks for posting it.

 

So far, no problems with my turned rotors. I think there are about 6K miles on them.