Rotor - dirt shield - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

  • 1 Post By El_Murcielago
  • 1 Post By G0RSQ
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#1 Old 07-29-2018
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Rotor - dirt shield

Should i repair/clean the dirt shield that surrounds the back of the rotor or replace it?

It's rubbing on the rotor

edit: rear passenger

cause:in the uk we have a major problem with our grids on the road, they just sink into the floor and they are located on the passenger side, i presume this is the cause of the damage..?
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#2 Old 07-29-2018
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That thing is called a back plate, at least here in the USA.

As for the repair/replace decision, it really depends on how badly bent it is and how much you care. In the UK, there's the MOT angle, which I can't possibly comment on. But assuming it won't impact the MOT, you can certainly just straighten it out. That assumes it isn't totally rusted out. Its job is to keep the brakes reasonably free of dirt and water, so it's not an optional part. But if it's just slightly bent, then just bend it back so it's not contacting the brake rotor.

Good luck!

By the way, I have an '89 Toyota pickup on which I did a lot of brake work a few years ago. The backing plates were quite rusty, and I wanted to replace them. That is until I found out that they are a dealer-only part, and that the Toyota dealer wanted $90 each for them. So I just took them off, cleaned them, and repainted them with Rustoleum. By the way, if you go this route, here's a couple tips.

Before painting, bake the backing plate in a cool (~250°f ) oven. This will drive all the moisture out of the metal. Once you have painted the final coat, you can bake again for about 20 minutes to harden the enamel. Make sure to prop the piece up on some kind of support. I made some brackets out of old coat hangers. The point is to only touch the backing plate in a spot that's likely to stay dry under normal use. When you remove the stand, it's likely to damage the paint at that spot.
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Last edited by El_Murcielago; 07-29-2018 at 03:56 PM. Reason: "F)" turns into something I don't want.
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#3 Old 07-29-2018
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Replacing the back plate requires removal of the hub.

Mine are quite badly rusted (no holes, but quite thin in places) and it is easily bent.

I straightened them, "curust" treated and painted them (which doubled the thickness )

no problems, but if I ever need to remove the hubs, I will replace them.
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#4 Old 07-31-2018
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did they make noise prior to you repairing them?

if so what kind of noise
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