Rotor surface too worn?

[vinu_neuro]

I've been procrastinating doing the rear brakes on the TL and it's been making noise the last week or so. Just looked at the rear rotors and they're pretty awful. Probably need to replace, and can't be machined right?




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[xxch4osxx]

If it was me, Id just replace with new rotors, but that is just how I am. I never turn rotors.

 

[dparm]

Rotors are cheap, I'd just replace them.

 

[dgee]

Originally Posted By: dparm
Rotors are cheap, I'd just replace them.


+1

 

[rpn453]

It looks like the caliper may be seized.

 

[71Chevyguy]

I have seen many rear discs look like this because many rear brakes are less effective over time. Not sure if it is because people do not give them a good slam once in a while or what. I had access to a brake lathe so I would just clean that up on the lath to freshen things up. Most of the time at this point rotors are so cheap you might as well just get new ones since it will probably cost you about as much to get them cut. If you do not want to throw them away then I am pretty sure they have plenty of life left in the if you got them shaved down a bit. Many of the rotors have grooves in them on the outer surface showing what the minimum thickness is and chances are you are not near that point yet. Unless they are expensive I would just get new ones personally.

 

[vinu_neuro]

$75 for new rear Centric Premium rotors for this 05 TL. Compared to $20 to get these machined at the local shop. I'm going to take them in and see what they say first.

 

[sasilverbullet]

Honda's are pretty persnickety about brakes. You can turn them if there's plenty of metal left, make sure you check the min thickness before doing that and the thickness after you've turned them.

Once you either have a new rotor or a turned one - clean the surface real well with brake cleaner and put HONDA pads on. They're expensive but you get what you pay for. My neighbor is a Honda mechanic and he's so many problems with aftermarket pads.

Once all on be sure and "bed" them in properly:
1. Find long stretch of road where you can safely accelerate quickly to 60mph and then decelerate to 20mph quickly.
2. Accel up to 60mph, slam on brakes pretty hard and come down to 20mph or so - do not completely stop
3. Accel back up to 60 and back down to 20 again.
4. Do this one more time.
5. IMPORTANT: at this point do NOT stop the car!!!! Keep driving it without applying the breaks for about 10 mins if possible, 20 mins would be better. Those rotors need to cool off. If you come to a stop with them real hot and keep your foot on the brake you WILL ruin the bedding in and then weld pad material to one spot on the rotor. This will cause you to thing the rotors are out of round. To fix this, you have to sand with Garnet paper all the rotors, back and front and then do the bed in procedure again.

Oh, and whenever you put new pads on you need to do this bed in procedure.

 

[Eddie]

yOU DON'T KNOW IF IT IS TOO WARN UNTILL YOU MEASURE THE THICKNESS WITH A MICROMETER. Ops Caps-Sorry. Yes new rotors can be inexpensive but, not always good quality. I would first see about having the OEM ones turned.

 

[artificialist]

When I find rotors that severely pitted, I always recommend new ones. Often there will still be some pits in them after you have machined the disc to the limit.

Also, I once used AEM brake pads on a Honda CRV, and they were the best I ever used on a Honda. They were made by Nissin, a company that makes many OE brake parts for Honda.

 

[Donald]

If you take it to a store that actually does the machining, they can tell you the real deal. Some shops machine and some send it to another shop to machine. I am with the replace them crowd, they are cheap.

 

[AdRock]

If you take them to get turned have them measure the thickness with you standing there. I've seen it way too manyy times where they'll just tell you they're too worn just to sell you new ones.

 

[mechtech2]

Get new cheap rotors.
Expensive ones are no sure thing anymore.
And forget silly break in advice. We do not race. The extreme high temperatures and pad deposition does not occur for us.
Just drive normally, and expect 1-500 miles to get things pretty normal.