Groove on driver side rotor

jsutton2 · 12-05-2015, 02:39 PM

I upgrade my rotors to the Z1 two piece set about 1-2k miles ago, and today I noticed there is a groove being cut into the rotor on the driver side only.

I've attached some pictures of both sides to compare.

I was hoping someone might have an idea what's causing this, and if I should address it, and how?

Thanks in advance for any help you guys can provide.

Driver side:

Passenger Side:

jsutton2 · 12-05-2015, 02:41 PM

Now that I see these pictures side by side like that, the front has a lot more un-even or excessive wear than the passenger side does...

AdamRacer · 12-05-2015, 03:09 PM

Looks like a rock or hard peice of brake pad got stuck in there causing the groove.

ResIpsa · 12-05-2015, 03:21 PM

Grooves like that are usually formed when your brake pads have worn down and the metal rivets are contacting the rotor surface. However, looking at the place on your rotors that seems a little bit high to be a rivet.

The first thing you should do is check to see if your pads are so worn that a rivet is poking through. Otherwise, I agree with the previous post that may be a rock for some for material is stuck between the rotor and your pads.

Rusty · 12-05-2015, 06:21 PM

I would pull those pads out and see how they are worn.

KoolKarmaJoe · 12-06-2015, 06:19 PM

Quote:

Originally Posted by Rusty

I would pull those pads out and see how they are worn.

Good tip! Thanks.

Sent from my XT1254 using Tapatalk

jsutton2 · 12-07-2015, 12:34 PM

Thanks for the help guys.

Is it possible that one side is working harder than the other, or do they balance automatically?

Im not sure why the passenger side looks so good (almost new), but the driver side looks so bad.

These brakes only have 2k'ish miles on them...

Rusty · 12-07-2015, 02:04 PM

To get rid of the groove. You will have to machine the rotor. And file down the high spot ridge on the pad. The groove could be caused by a soft area around the rotor, or a hard spot on the pad.

12-05-2015, 02:39 PM	#1 (permalink)
jsutton2 Base Member Join Date: Jul 2014 Location: Austin Posts: 239 Drives: 2010 370Z Sport Rep Power: 10	Groove on driver side rotor I upgrade my rotors to the Z1 two piece set about 1-2k miles ago, and today I noticed there is a groove being cut into the rotor on the driver side only. I've attached some pictures of both sides to compare. I was hoping someone might have an idea what's causing this, and if I should address it, and how? Thanks in advance for any help you guys can provide. Driver side: Passenger Side: __________________ 2010 Brilliant Silver 370z Sport - 08/01/2014 - And so it begins...

12-05-2015, 02:41 PM	#2 (permalink)
jsutton2 Base Member Join Date: Jul 2014 Location: Austin Posts: 239 Drives: 2010 370Z Sport Rep Power: 10	Now that I see these pictures side by side like that, the front has a lot more un-even or excessive wear than the passenger side does... __________________ 2010 Brilliant Silver 370z Sport - 08/01/2014 - And so it begins...

12-05-2015, 03:21 PM	#4 (permalink)
ResIpsa Track Member Join Date: Apr 2009 Location: Virginia Posts: 564 Drives: 09 RACING HEN Rep Power: 338	Grooves like that are usually formed when your brake pads have worn down and the metal rivets are contacting the rotor surface. However, looking at the place on your rotors that seems a little bit high to be a rivet. The first thing you should do is check to see if your pads are so worn that a rivet is poking through. Otherwise, I agree with the previous post that may be a rock for some for material is stuck between the rotor and your pads. SouthArk370Z likes this. __________________ The Reed Law Firm; Michael Fasano VA Attorney and Counselor at Law: A Virginia Traffic, Criminal, and Family Lawyer.https://reedlawva.com/ Last edited by ResIpsa; 12-05-2015 at 03:24 PM.

12-05-2015, 06:21 PM	#5 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,900 Drives: 2011 Nismo GM 6M Rep Power: 2684436	I would pull those pads out and see how they are worn. kenchan and KoolKarmaJoe like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

12-07-2015, 12:34 PM	#7 (permalink)
jsutton2 Base Member Join Date: Jul 2014 Location: Austin Posts: 239 Drives: 2010 370Z Sport Rep Power: 10	Thanks for the help guys. Is it possible that one side is working harder than the other, or do they balance automatically? Im not sure why the passenger side looks so good (almost new), but the driver side looks so bad. These brakes only have 2k'ish miles on them... __________________ 2010 Brilliant Silver 370z Sport - 08/01/2014 - And so it begins...

12-05-2015, 03:09 PM	#3 (permalink)
AdamRacer Enthusiast Member Join Date: Jan 2012 Location: North Florida Posts: 316 Drives: '12 MBlue 370z 6sp Rep Power: 13	Looks like a rock or hard peice of brake pad got stuck in there causing the groove.

12-07-2015, 02:04 PM	#8 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,900 Drives: 2011 Nismo GM 6M Rep Power: 2684436	To get rid of the groove. You will have to machine the rotor. And file down the high spot ridge on the pad. The groove could be caused by a soft area around the rotor, or a hard spot on the pad. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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