Should I replace these rotors?

mazen222 · 11-05-2023, 04:09 PM

I’m due to replace the pads.
Ideally I want to replace the rotors in summer so they don’t rust during the winter and all the salt.

They have a small groove on them…

SuperLomi · 11-05-2023, 04:23 PM

What do they measure? They look fine to me if they are above min spec and not warped.

If you’re going to replace them in summer, you’ll want new pads then also. So either wait for both (if you can) or do both now if it needs rotors. Or just do pads and wait until next time to do rotors.

Billfitz · 11-05-2023, 04:37 PM

What groove? The one near the outer edge? The pad doesn't contact the rotor there, so it doesn't matter. Rotors rust from rain. They're cast iron, that's what cast iron does. They don't seriously rust where the pad makes contact, which is what matters. Some surface rust will form there after a rain or snow, but it gets wiped right off by the pads within a hundred feet or less of driving.

mazen222 · 11-06-2023, 01:00 PM

No, the grooves are where the pads make contact - see pic. It is very light
The rust i was reffering to is absolutly for esthetics.

I though of getting the cheapest pads to pass the winter... thats like 50$ and in summer i'll do full high performance rotors, cermic pads and paint my calipers.

N1rve · 11-06-2023, 03:12 PM

Quote:

Originally Posted by mazen222

No, the grooves are where the pads make contact - see pic. It is very light
The rust i was reffering to is absolutly for esthetics.

I though of getting the cheapest pads to pass the winter... thats like 50$ and in summer i'll do full high performance rotors, cermic pads and paint my calipers.

You can get Zimmerman Rotors and Akebono pads. You want the coated Zimmerman rotors as it has some anti-rust coating on it. The Akebonos are a quiet ceramic pad option. Get it from FCP Euro and it’s free lifetime replacement for wear and tear.

Billfitz · 11-06-2023, 03:48 PM

Quote:

Originally Posted by mazen222

No, the grooves are where the pads make contact - see pic. It is very light

Too light for me to see in the picture, so too light to matter.

Quote:

The rust i was reffering to is absolutly for esthetics.

Coated rotors are rust resistant, but you'll still get rust on the outer edge.

11-05-2023, 04:09 PM	#1
mazen222 Private First Class 28 Rep 161 Posts Drives: BMW 435i Join Date: Apr 2020 Location: Huntington Beach, California iTrader: (0)	Should I replace these rotors? I’m due to replace the pads. Ideally I want to replace the rotors in summer so they don’t rust during the winter and all the salt. They have a small groove on them… Attached Images
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11-05-2023, 04:23 PM	#2
SuperLomi First Lieutenant 204 Rep 383 Posts Drives: 2013 335i M-Sport Join Date: Nov 2020 Location: KY iTrader: (0)	What do they measure? They look fine to me if they are above min spec and not warped. If you’re going to replace them in summer, you’ll want new pads then also. So either wait for both (if you can) or do both now if it needs rotors. Or just do pads and wait until next time to do rotors.
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11-05-2023, 04:37 PM	#3
Billfitz Lieutenant General 8245 Rep 16,088 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	What groove? The one near the outer edge? The pad doesn't contact the rotor there, so it doesn't matter. Rotors rust from rain. They're cast iron, that's what cast iron does. They don't seriously rust where the pad makes contact, which is what matters. Some surface rust will form there after a rain or snow, but it gets wiped right off by the pads within a hundred feet or less of driving.
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11-06-2023, 01:00 PM	#4
mazen222 Private First Class 28 Rep 161 Posts Drives: BMW 435i Join Date: Apr 2020 Location: Huntington Beach, California iTrader: (0)	No, the grooves are where the pads make contact - see pic. It is very light The rust i was reffering to is absolutly for esthetics. I though of getting the cheapest pads to pass the winter... thats like 50$ and in summer i'll do full high performance rotors, cermic pads and paint my calipers.
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