re: 1992 400E.

What can cause brakes to pulsate? Besides warped rotors. The pulsating was quite pronounced so I put on new new Balo rotors and new pads, it was fine for a couple of months, but now it has come back and is getting worse. It's more noticeable when the brakes warm up, not so much when cold. I'm assuming there must be something wrong with a caliper - but what? The calipers must not fail often because dealers don't stock them - although they do have a caliper rebuild kit for about $60. But what could cause the pulsating to come back so soon?

Front??

If yes , check the load adjustment on the wheel bearings

Warping the rotor can be caused by over torqueing the lug nuts also.


If it was easy everybody would do it!


Junqueyardjim

Couple things to check:

- If rotors have a darkened area, uneven surface appearance, then overheating or burned-on contaminants might be the cause.

- Not meticulously cleaning the hub face and completely cleaning off the coating on new rotors will affect the way they seat, causing eccentric rotation. This leads to uneven wear and poor braking feel.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

Warped wheel/unevenly worn tire?

I'd say rotors. Brand new doesn't mean they are good. The last time my rotors were changed, we went through 4 sets right out of the box. Any they were OE by the way, not the cheap stuff.

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joel

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