My brain is warped from navigating all the ridiculous reliability garbage from people who don't even currently own Lexus vehicles.

HEY MOD... C'mon man.

 

Running into water like that won't warp them. As was said before the discs don't actually warp, its pad deposits on the disc from hot spots in the disc.

How do you go about washing the car? Do you use a run through carwash? I found one time that a specific carwash I was using had some sort of wheel cleaner that was causing buildup on my brake discs and when I stopped using it the issue went away.

 

I go to a hand wash. Or occasionally wash it myself, So I dunno.

Bottom line, I'll try a new set of Centric or Power Stop rotors with matching pads and try again. This time I will note exact milage and try to document the moment they start pulsing again.

 

Very weird...make sure they are torqued down right and all...

 

I put that link there to back up what I said about the prices from dealers in Canada, not as a reference as to where to purchase. That doesn't stop people from ordering JDM parts or junk from Amazon that comes from China.

 

Quote:

I will admit, I drive fast on the highway, but I'm like a little old lady on local roads.

Your Honor, I rest my case.....or you put too much faith in your mechanic.
After all the trouble you claim to have had I would start by removing everything to the hubs and start with runout there then mount the rotors and repeat on the face of the hat before I put anything new on, how do you know your guy is burning/bedding the pads in properly? Not all but some guys use a trip around the parking lot as a test for operation new brakes.

As to driving through a puddle and seeing lots of steam, maybe you have a wheel bearing helping to heat things up because that's not normal unless you're really driving hard like tracking...who knows, is your mechanic is always giving you smokin hot deals on service ?

 

Smoking hot deals on service? I see what you did there... lol Not at all. He prices fairly, and warranties all his repairs for a year. He replaced two sets of discs and even warranted the labor on the ones I bought myself. I have a great relationship with the service center (it's a legendary Miami Beach mechanic called "Larry's Service Center") They bed them in or tell me I have to do it myself, which after 30 years of taking cars there, I'm OK with. This is the only issue we have ever dealt with on over 7 cars over the years that is unexplainable.

I was just hoping that maybe this was a common issue with a known fix. Maybe I should just get that Volvo....

 

Larry Service Center is a good shop.

Have you discussed your issues and concerns with Mark Raybon? I can't tell you how to instruct Mark or his technician on how to perform a proper brake job.

"The two common problems that cause pedal pulsation are lateral run-out and disc thickness variation. Lateral run-out is typically caused by run-out from the hub face, wheel bearing, uneven lug nut torque, or a buildup of rust and corrosion between inner and outer surface of the rotor between wheel and hub. Disc thickness variation is most often caused by excess pad transfer, the very thin layer of pad material that bonds to the rotor surface, and uneven wear from an improperly mounted caliper.

Not all shops make sure the hub and wheel surfaces are free from rust and corrosion, nor do they lubricate both sufaces!

 

It’s a common issue unfortunately the fix that solved it for all of us didn’t solve it for you unfortunately.

 

@mannye If you keep experiencing warped rotors, you should find out the runout of each rotor next time. It is possible that only one rotor has excessive runout which points to an issue to that side, such as a bad caliper/piston or sticking/worn slide pin(s). If both rotors have similar runout, then both sides may have the same issue, or it could be linked to your driving habits, which I kinda doubt. Also, the hub face needs to be smooth. If there is rust buildup, that little thousandth of an inch buildup can cause runout issues. BTW, a rotor runout tool is only about $50 for the layman mechanic and worth the investment if you do your own brakes.

 

Check the hub surfaces as mentioned a few times already....

 

So wait a second....if it's the hubs, or brake pad material and forgive me for forgetting this... Why do my brakes only pulse when the discs get hot? The first few stops at low speeds on city streets are smooth. Only after a few uses, when I asume they have heated up do they start to pulse....

 

Expansion and contraction and coefficience of friction

 

I even clean them with fine wire brush so they are Shiney before I apply the lube. don't over grease these.

 

Phew.......