riddle me this Batman

[Kibokojoe]

When is lightly step on the brake at about 50 to 60 mph I get a slight wobble from the front end. But if I lightly step on the brake again for a total of two or three times the wobble goes away. Most of the time the wobble goes away on the third time and occasionally on the second.

[Ross]

If you feel it in the brake pedal look to the rotors and stuck calipers. If only in the steering wheel look to tires or suspension, start by rotating tires.

[Kibokojoe]

Ok I will rotate tires first. Rebuilt the calipers a couple of months ago. Any yes they had stuck, wonder if the rotor is warped now?

[ss2115]

Ok I will rotate tires first. Rebuilt the calipers a couple of months ago. Any yes they had stuck, wonder if the rotor is warped now?

Yes - machine or replace the rotors and it will go away.

[BMW4LIFE]

Yes - machine or replace the rotors and it will go away.

I disagree on the machine rotors part but highly agree with replacing them!;)

Machining is a waste of money and you are further more prone to warping your rotors because now they are thinner than before...

I would get some ATE power slotted rotors and jurix or textar pads (i think i spelled them wrong) I love them! =)

[ss2115]

If the rotors are in good condition otherwise and havn't been machined previously, then the minor warpage he's experiencing would only take a very light skim.
Under all other circumstances I would be replacing the rotors as well - especially on BMW's or Mercedes.

[BMW4LIFE]

If the rotors are in good condition otherwise and havn't been machined previously, then the minor warpage he's experiencing would only take a very light skim.
Under all other circumstances I would be replacing the rotors as well - especially on BMW's or Mercedes.

I totally agree with you that it would take a "light skim" but unless he can get it machined for FREE its not worth it top spend $50-$70 to get them machined when you can get now ones for a little more...

Couple things I will NEVER go cheap on are tires and Brakes...can't count the number of time where they have saved my life (both in the BMW and the RC51)

my 2 cents

[ss2115]

I totally agree with you that it would take a "light skim" but unless he can get it machined for FREE its not worth it top spend $50-$70 to get them machined when you can get now ones for a little more...

Couple things I will NEVER go cheap on are tires and Brakes...can't count the number of time where they have saved my life (both in the BMW and the RC51)

my 2 cents

Rotors (like most things) must be a lot cheaper in the USA than they are here in Australia. We can get aftermarket rotors for around Au$180 but a good quality set or OEM can run up to $400.
ie: machining is usually around 1/3rd the cost or better.

But I agree - I'm a person who will normally go new but thats just me. Everyone has a different income and everyone has a different view on life, recycling, replacing etc.

[bsell]

We don't know the last time the front bushings have been replaced, do we?

Couldn't a little runout in the rotors get the worn front bushes 'singing' a little due to thier softness? Once he taps the brakes a couple times, the bushes get 'set' in the rear position and behave...

[Kibokojoe]

Thought of putting a bushing set in the calipers also. I assume they are available.

[Scott C]

Thought of putting a bushing set in the calipers also. I assume they are available.


For what it is worth - I had an issue that drove me nuts - it was a 55mph wobble/vibration in the steering wheel that was intermittent. Short story is that the caliper piston (not the sliders) was not fully retracting - varnish I assume. This problem caused me to go through 3 sets of control arms in 9 years....

Scott

[ArnZ!]

Here in Australia i can get my rotors machined for $15 a disc. Now of coarse this is okay if your discs still have plenty of meat on them, if not then obviously go with new rotors, I recently picked up some RDA discs for $150 for the pair upfront, no problems what so ever.

I agree with the above comment, if you do feel a shimmy on the brake pedal then its most likely a brake related problem.

They say warped rotors is 99% myth, try re-bedding the pads as apparently its just pad material left on the rotor is thicker in some places which gives you the illusion of warped rotors. Just try re-bedding them and see how you go.