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Brake rotors rust on the edge...

 
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Old 29 May 2013, 08:18 pm
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Default Brake rotors rust on the edge...

Is it normal for the brake rotors to rust on the edge?
I can see where the pads grip because it is shiny, but the edge seems to not be touched by the brake pad.
Is this normal?
RE 2007 PT Cruiser Limited Touring.
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Old 29 May 2013, 08:33 pm
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Default Re: Brake rotors rust on the edge...

That could be normal I just replaced my fronts about a month ago . They were starting to grind and found out the back side of the Rotors were rusting BIG Time . the rear rotors were still in great shape just the fronts were taring up the Brake pads. So check the inside of the front rotors .for some reason they do this .
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Old 29 May 2013, 08:39 pm
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Default Re: Brake rotors rust on the edge...

Quote:
Originally Posted by jcmnz24 View Post
Is it normal for the brake rotors to rust on the edge?
I can see where the pads grip because it is shiny, but the edge seems to not be touched by the brake pad.
Is this normal?
RE 2007 PT Cruiser Limited Touring.
Quote:
Originally Posted by fy9-03pt View Post
That could be normal I just replaced my fronts about a month ago . They were starting to grind and found out the back side of the Rotors were rusting BIG Time . the rear rotors were still in great shape just the fronts were taring up the Brake pads. So check the inside of the front rotors .for some reason they do this .
Yes this is a common occurrence on many automobiles these days.
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Old 29 May 2013, 10:51 pm
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Default Re: Brake rotors rust on the edge...

Anywhere friction doesn't touch it'll corrode- Outer edges more, because this area gets hotter than center- Heat is a catalyst of oxidation-

You can remove them, use an angle grinder with wire wheel, or dunk them in a pickle bucket with a little baking soda.
hook a small battery charger to the rotor, and put three metal things around it-
like old lawmover blades.

It'll take rust right off.
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Old 29 May 2013, 11:19 pm
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Default Re: Brake rotors rust on the edge...

Every time I wash my car the rotor rust up. LOL So its NORMAL. There are things you can do to reduce or in some cases prevent this form happening.


What I do....use high heat paint rated @ 1200 + degrees. I prefer VHT VHT Flame Proof Header Paint. Mask the rotor wear the pad makes contact and just slightly smaller so the paint will overlap the pad area. Let dry and then when you first drive apply the brakes slowly a few times to clean off the over sprayed area. Then do a few moderate stops and then park and let the rotors cool down. Do this a couple of times to let the paint cure. The paint should last almost the life of the rotor, be durable for cleaning and will no longer rust.

I have not done this to my PT as I am preparing a complete brake system overhaul.
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Old 30 May 2013, 12:31 am
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Default Re: Brake rotors rust on the edge...

100% normal.

Rotors and drums are made of hardened steel, but its carbon treated, carbon rusts quick. You can put brand new rotors and drums on a car, and notice a dusting of rust within a week :-D

Its fine :-D
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Old 30 May 2013, 11:34 pm
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Default Re: Brake rotors rust on the edge...

Rotors are Cast iron- Drums are composite- Center is steel and 'drum' part, per se' is cast iron.

Cast iron actually gets stronger the hotter it gets, and is a 'dead' material so it doesn't transmit much. I think it has good friction qualities, too
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Old 31 May 2013, 06:02 am
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Default Re: Brake rotors rust on the edge...

It is normal, and one of the reasons I bought disks from ThatRotorShop.Com - they dip the disks in molten Zinc.
I have had mine on for about a year. and there is only surface rust where the pads scrape - the vented areas are nice and shiny since zince doesn't rust.
I wasn't concerned about the appearance, but that the rust flakes would clog the venting passages.
Another benefit is that the disk won't rust to the hub, since that is zinc coated also.
They weren't much more expensive than regular disks.
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Old 31 May 2013, 07:18 am
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Default Re: Brake rotors rust on the edge...

Just put Zinc rotors on, they will not rust and will look new for years.
One click brake kit from powerstop comes to your door. I can't say how great the customer service is at Car-id too !
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Old 01 Jun 2013, 11:50 am
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Default Re: Brake rotors rust on the edge...

I had drilled and sloted rotors on my 03 the fronts inside face and Pads were completely gone .Face of rotor was so rusted it tore up the ceramic pads to peices .Rears were still just like New and only about 1 1/2 years old . Could it have been a defect in Material maybe? I don't know .
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