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About two weeks ago I installed new centric premium rotors and Akebono ceramic pads on my 2003 Accord. Today I noticed this hair-line groove in my left front rotor. The pads and rotors are not fully bedded in yet….maybe 200 miles driven. Will this groove go away in time? Is this something that I should be concerned about? Braking performance is great.
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Keep an eye on it as you drive more. It maybe a hardspot in the pad. But check to see if there is anything on the pad. IMO it should go away after the pads and rotor start to wear but it may not so keep an eye on it.
I’m going to keep an eye on it. If it’s still there once the new pads are fully bedded, or it starts looking deeper, I will pull the pads off and check things out.
Unfortunately, you made very basic but costly down the road mistake. You did NOT bed in your rotors and pads BEFORE regular use. This is very common, though bedding in procedures are well known and highly recommended in DIY community.
Here’s an excellent article on this:
http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-mythsWhat you see is a hard object caught between pad and rotor, that lathed a grove in it. You want to take pad off, and resurface it on a flat sand paper. Wear mask, thing is dangerous to inhale. If I were you, considering that rotors are “fresh”, I’d have all four pads removed, resurfaced, rotors removed, and rotary sanded to remove glaze, then bed them in right away.
Be well.One way of doing this:
Or:
Step Five: Resurfacing the Rotor
First, lay the rotor flat on the ground
Then, using a drill and a abrasive pad (cookie) slowly begin roughing up the surface of the rotor
Next, do the same on the other side of the rotor
Then, when you can no longer see your reflection in the rotor you are complete
Finally, simply put the rotor back on the hub[quote=”ukrkoz” post=106753]Unfortunately, you made very basic but costly down the road mistake. You did NOT bed in your rotors and pads BEFORE regular use. This is very common, though bedding in procedures are well known and highly recommended in DIY community.
Here’s an excellent article on this:
http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-mythsWhat you see is a hard object caught between pad and rotor, that lathed a grove in it. You want to take pad off, and resurface it on a flat sand paper. Wear mask, thing is dangerous to inhale. If I were you, considering that rotors are “fresh”, I’d have all four pads removed, resurfaced, rotors removed, and rotary sanded to remove glaze, then bed them in right away.
Be well.[/quote]I am well aware of bed-in procedures. Akebono does not recommend any special “bedding in” with their pads.
From Akebono’s website – “400 to 500 miles of moderate driving is recommended. Consumer should avoid heavy braking during this period.”
Also, it is a common misconception that new brake pads MUST be bedded in by doing a series of stops from moderate speed. New brake pads will naturally “bed in” by themselves over time. “Bed in” procedures just speed up this process.
Back to my rotor – yeah, I’m pretty sure that its either a piece of foreign debris between the pad and rotor, or a hard spot in the pad. I might pull the caliper off today and take a look.
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