The brake story: frequent disk warpage

[Lux]

Hi guys.

I am aware of the effects of wheel torque-- and variations thereof-- on the brake disk and hub assembly. I am fairly confident in the torquing of my own wheels (120 Nm) and the accuracy of my torque wrench, being that it was recently calibrated by NIST-traceable equipment. I checked its accuracy on the weekend against my other torque wrenches and they are all consistent: variation within 0.7% or less of each other.



My torque wrench is the Snap-on TQFR250E. My two others that I checked it against are Snap-on ATECH3FR250B and Snap-on ATECH2FR100B.

With that being said, I think we can drop the speculation of improper wheel torque.

Originally Posted by CoryM

Fixes:

- instead of staying on the brakes steady down a hill, release them occasionally. They will cool down a LOT in the second or two you release.
-always come nearly to a stop, and then let your car roll for the last few feet. Let the rotors cool down below the critical temp before sitting there stopped with foot on brake.
-if your rotors are hot, but you still need to hold the vehicle at the light etc, use the park brake for a few seconds. Rear brakes do not get nearly as hot as front and are much less likely to warp.
-make sure your rear brakes are adjusted correctly. Otherwise the fronts end up doing all the work.

Hi CoryM, I still think the disks are unable to cope with the heat and am still considering alternative solutions. Do larger brake calipers and disks from another Toyota car fit on the front? What about the rear disk conversion (using genuine Japanese OE parts)? By the way, I do make sure to bed in the brakes with a increasing-torque regimen after installing them. Additionally, after a high-speed stop, I hold the car with the parking brake in an attempt to prolong the life of the disks and avoid prolonged parking of the hot pads on the same section of disk... although that seems to have been wasted effort because they is still disk warpage.

Kindly