My Rotor has a hole in it!
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Senior Member
Joined: Jan 2006
Posts: 491
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From: Redding, California
AMG GTS
My Rotor has a hole in it!
Hey guys, I don't know much about brakes...but recently on my other car I did a pad swap (along with re-surfacing rotors) and that went all dandy...then today as I wash washing my car (beautiful day today) I wanted to check on how the pads on my C230 was doing...as I looked I saw a hole in my rotor...probably the size of a little pebble...it looks as if some little rock boucned up from the road and just punctured my rotor...I have no idea how this happened...if anyone can fill me in (maybe I am doing something that is unhealthy to my car?) I would greatly appreciate it. Also, I wash my car properly...I don't shoot water at the rims right after driving...I let it cool for about an hour prior to washing so I don't "warp" the rotors (I learned this forum's detailing section)...I attached some pictures...again, if anybody can fill me in on what is going on...i would appreciate it. thanks.
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W206 PHEV AMG
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From: San Jose area
'19 E63S sedan
Resurfacing rotors is not recommended for Mercedes brakes. You leave them alone until they're at the wear limit and then replace them. You should replace them now. Chances are you took them below the limit. They won't dissipate heat quickly enough, which could cause all sorts of problems.
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Thread Starter
Senior Member
Joined: Jan 2006
Posts: 491
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From: Redding, California
AMG GTS
Resurfacing rotors is not recommended for Mercedes brakes. You leave them alone until they're at the wear limit and then replace them. You should replace them now. Chances are you took them below the limit. They won't dissipate heat quickly enough, which could cause all sorts of problems.
Oh well...another reason for some slotted/drilled rotors 
trezaei....when I saw the hole in my rotor...the first thought was "hey hey hey!! already on my way to getting drilled rotors...hoorayyyy!!"
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From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
Resurfacing rotors is not recommended for Mercedes brakes. You leave them alone until they're at the wear limit and then replace them. You should replace them now. Chances are you took them below the limit. They won't dissipate heat quickly enough, which could cause all sorts of problems.
I agree with the manufacturing defect. While I have not seen this before, I would get it replaced ASAP. You don't want to run the risk of cracking.
E
Thread Starter
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Joined: Jan 2006
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From: Redding, California
AMG GTS
Do you guys think I can really go in and say this is their fault...that it is defected and what not....plus...I think I would have to pay for one rotor as well...so that there is even rotors on both sides of the car...plus I am not sure if the rotors would be covered under my warranty...
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From: SoCal, Irvine
Stage 2 C7 A6, QX60
Do you guys think I can really go in and say this is their fault...that it is defected and what not....plus...I think I would have to pay for one rotor as well...so that there is even rotors on both sides of the car...plus I am not sure if the rotors would be covered under my warranty...
u have nothing to lose right
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Joined: Mar 2006
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From: San Jose area
'19 E63S sedan
Do you guys think I can really go in and say this is their fault...that it is defected and what not....plus...I think I would have to pay for one rotor as well...so that there is even rotors on both sides of the car...plus I am not sure if the rotors would be covered under my warranty...
Thread Starter
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Joined: Jan 2006
Posts: 491
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From: Redding, California
AMG GTS
Alright...I'll give the dealership a try whenever I can and keep you guys updated just in case, and god forbid, you guys find yourselves in my scenario...thanks a lot for the tips!
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From: Huntington Beach, California
2002 C230 Coupe
There is virtually nothing you can do (under normal operations) to cause a hole in the rotor. I've heard of cracks (hard use of the brakes, usually with cross-drilled rotors) but not a hole. This, IMHO, is clearly a casting defect. Especially since this looks like the rear rotor (solid rotor). Probably the rotor was cast and there was a bubble in the metal as it was formed. I think it's undeniable that it's a defect and would have been scrapped as a defect had a QA person seen it.
Bob
Bob
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
How much time and effort you want to spend fucing with this?
Buy a new rotor (or both) and slap it in, 10 minute job, and about 30-50 bucks.
Lesson learned. Don't resurface rotors.They warp.
Is it front or rear?
Don't resurface rotors.
It's not worth the hassle.
Buy a new rotor (or both) and slap it in, 10 minute job, and about 30-50 bucks.
Lesson learned. Don't resurface rotors.They warp.
Is it front or rear?
Don't resurface rotors.
It's not worth the hassle.
Thread Starter
Senior Member
Joined: Jan 2006
Posts: 491
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From: Redding, California
AMG GTS
Geez, calm down a notch buddy. First of all, I never re-surfaced these rotors before. Second, It would be nice if I can squeeze 2 free rotors out of the dealer through warranty so I can sell them and at the same time purchased some slotted/drilled rotors. And it is Front.
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From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
I disagree with you here. Rotors wear into the pads that have been used on them. This bedding process creates the fine lines that circle the rotor. When you resurface the rotors you get rid of this. Then you get a better bedding in of the new pads. As long as the rotor has enough metal on it, I prefer to get them resurfaced.
Resurfacing insures that I don't get brake wobble/steering wheel feedback during hard braking.
There are a number of procedures that MB recommends that I don't follow. Like changing oil. I always do it from the pan. I guess it is because I'm old school, but there are habits that I'm don't see a reason to change.
E
