HELP! groove in both rear rotors!
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HELP! groove in both rear rotors!
I have a new '02 f250 crew cab with 18,000 miles on it.
Just started hearing a light grind from brakes. Popped off tires and front rotors/pads look brand new. But, both rear rotars have a groove being etched into each rotor close to the outside edge of each rotor about 3/4" in. Both rear rotors have this groove in the exact same place. The pads look almost new. On the left side, you can bury your finger nail in the groove. On the right, you can just barely feel it, but it is definately on its way to getting deep like the left side. The location of the groove is definately under the pad???? Can the pad cause this??? But, in the same location on each rear rotor??? Anyone else see this? Can the rotors be bad from factory? I'm freaking out since I might be stuck replacing both rotors. It's in the dealership right now and i'm hoping warranty will cover it. But, they might say oh well - that's just wear and tear. I have never seen this before? I need to know from you guys if this is just the way it is, or should I push the dealer to replace the rotors and fix the problem?
Can anyone shed any light on it for me?
later.
Just started hearing a light grind from brakes. Popped off tires and front rotors/pads look brand new. But, both rear rotars have a groove being etched into each rotor close to the outside edge of each rotor about 3/4" in. Both rear rotors have this groove in the exact same place. The pads look almost new. On the left side, you can bury your finger nail in the groove. On the right, you can just barely feel it, but it is definately on its way to getting deep like the left side. The location of the groove is definately under the pad???? Can the pad cause this??? But, in the same location on each rear rotor??? Anyone else see this? Can the rotors be bad from factory? I'm freaking out since I might be stuck replacing both rotors. It's in the dealership right now and i'm hoping warranty will cover it. But, they might say oh well - that's just wear and tear. I have never seen this before? I need to know from you guys if this is just the way it is, or should I push the dealer to replace the rotors and fix the problem?
Can anyone shed any light on it for me?
later.
Last edited by deek; Feb 3, 2003 at 07:10 PM.
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Joined: Dec 2002
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From: Clarkston, MI
Your grooves correspond to the location of a rivet hole in the lining.
Even though the linings aren't worn down to the point where the rivet is chewing up your rotor, what happens is this. Dirt, sand and other abrasive particles get trapped in the rivet holes. After a while it fills them up. Since sand (silicon carbide) is harder than the cast iron rotor, when you make a brake application, you wear a groove into the rotor.
Off roading activity tends to make this occur more often.
It SHOULD be covered under warranty, by reading the words in the warranty, but I'll bet they do their best to pin this on you.
Good luck, and let us know how it all turns out.
Tom
Even though the linings aren't worn down to the point where the rivet is chewing up your rotor, what happens is this. Dirt, sand and other abrasive particles get trapped in the rivet holes. After a while it fills them up. Since sand (silicon carbide) is harder than the cast iron rotor, when you make a brake application, you wear a groove into the rotor.
Off roading activity tends to make this occur more often.
It SHOULD be covered under warranty, by reading the words in the warranty, but I'll bet they do their best to pin this on you.
Good luck, and let us know how it all turns out.
Tom
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Originally posted by 8mmag
Your grooves correspond to the location of a rivet hole in the lining.
Even though the linings aren't worn down to the point where the rivet is chewing up your rotor, what happens is this. Dirt, sand and other abrasive particles get trapped in the rivet holes. After a while it fills them up. Since sand (silicon carbide) is harder than the cast iron rotor, when you make a brake application, you wear a groove into the rotor.
Your grooves correspond to the location of a rivet hole in the lining.
Even though the linings aren't worn down to the point where the rivet is chewing up your rotor, what happens is this. Dirt, sand and other abrasive particles get trapped in the rivet holes. After a while it fills them up. Since sand (silicon carbide) is harder than the cast iron rotor, when you make a brake application, you wear a groove into the rotor.
Off roading activity tends to make this occur more often.
It SHOULD be covered under warranty, by reading the words in the warranty, but I'll bet they do their best to pin this on you.
Not worth the time to fight with the dealer about this. warranties are almost worthless to the customer since the language is always grey and leaves it up to the dealer. I started to tell the service guy to replace the rotors under warranty and then the fight was on. Screw it, i'm just so sick of fighting with service guys at this point that it's just a lost cause. I'm getting too old for this ****.
