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  #1  
Old 06-05-2014, 11:45 AM
Fulcrum525's Avatar
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Talking My potentially 300,000 mile brake rotors

Just though I would post these pictures. I replaced my brake rotors a while back and after going through the vehicle records I couldn't find any indication that they were ever replaced previously which means that these could potentially be original and therefore 300,000 mile rotors! The lip on them should give some indication of their age.





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  #2  
Old 06-05-2014, 12:28 PM
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Turn them & see if they'll go another 300,000.
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Old 06-05-2014, 12:41 PM
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doubtful...

not impossible, but very unlikely.

good pads, non metallic always... soft braking... mostly highway driving, I could see it.

DON"T TURN THEM!!!

I'd just hit the lip with a grinder, and put them back on, assuming the thickness is within tolerances.
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Old 06-05-2014, 12:43 PM
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if the car was always from CT, I seriously doubt it. Did it come from some wide open state with vast highway distances? Then it could be possible.

Ive never gone down 95 without slamming on the brakes at least a few times. I doubt even a benz rotor could last 300k in those local driving conditions.
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Old 06-05-2014, 12:49 PM
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Quote:
Originally Posted by JB3 View Post
if the car was always from CT, I seriously doubt it. Did it come from some wide open state with vast highway distances? Then it could be possible.

Ive never gone down 95 without slamming on the brakes at least a few times. I doubt even a benz rotor could last 300k in those local driving conditions.

Actually I think it is possible. The car had 150,000 or so miles on it when I purchased it and the original owner used to drive it all the way up and down the east coast (I have oil change receipts from just about every Atlantic state Mercedes dealership.)

I myself drove a lot of mostly highway miles over the next 150,000 miles and most of that was on I-84 or the Merrit parkway during off-peak hours. I would say that i'm excellent at predicting traffic so most times I would just left off the pedal long before so that the brakes were only rarely used.

(FYI I already installed new rotors last year, I had these in the shed, they are destined for the scrap yard)
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Old 06-05-2014, 01:08 PM
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Maybe the classic center will put them on display .
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Old 06-05-2014, 01:15 PM
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scrap yard? why? did they pulse or chatter? they look great to me. not perfect certainly, but still WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAYYYYY better than some I've pulled off of cars.

last week, I pulled the pads, and they were VERY conical shaped towards the center... turns out, the inner surface of the rotor on the center edge was GONE!!! air blades showing through the surface... REALLY bad.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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Old 06-05-2014, 01:23 PM
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Originally Posted by vstech View Post
doubtful...

not impossible, but very unlikely.

good pads, non metallic always... soft braking... mostly highway driving, I could see it.

DON"T TURN THEM!!!

I'd just hit the lip with a grinder, and put them back on, assuming the thickness is within tolerances.
Do people tell you you're too cheap? I get that a lot when doing stuff like homebrew brake machining.
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  #9  
Old 06-05-2014, 01:23 PM
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Put them up on eBay as "Genuine Mercedes-Benz Vintage High Mileage Award Winning Rotors".

That or stick them in the trunk as spares, like some do with their old radiator hoses.
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  #10  
Old 06-05-2014, 01:45 PM
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Hm, my rotors have a similar lip... you'd just grind that off?

-J
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  #11  
Old 06-05-2014, 01:47 PM
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Hm, my rotors have a similar lip... you'd just grind that off?

-J
I would say they are free to whoever want's them if they want to do that
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  #12  
Old 06-05-2014, 02:33 PM
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Thats what happens when you have 300x28mm rotors. I'm surprised more W123 owners don't upgrade to these.
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  #13  
Old 06-05-2014, 03:06 PM
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If you do a lot of highway driving with minimal stopping then those rotors can go the distance. But on a lot of stop and go traffic, they'll get chewed up much sooner.
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  #14  
Old 06-05-2014, 03:35 PM
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My rotors on my 420SEL only have barely 10k on them and they are almost half way to that level of wear! I drive rather aggressively...
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  #15  
Old 06-06-2014, 10:50 AM
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Quote:
Originally Posted by compu_85 View Post
Hm, my rotors have a similar lip... you'd just grind that off?

-J
yup.
I fire up the side grinder, and gently set it on the edge of the rotor, then rotate the rotor until the lip is gone.

DONE.
however, if there is any pulsing or chatter from the brakes, I just toss them... I don't want to turn MB rotors, and there is no way I could fix a warped rotor with a side grinder!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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