Originally Posted by Zillon
On my Focus, it has gotten worse over time, which leads me to believe that the problem is most likely due to either the bearing or the strut, or a combination of the two parts going bad together.
I agree. I know that at least one guy (probably of whom you speak) reporting, with pics, bad struts. My only hesitation in that is that people are reporting positively with the replacement of the bearings, even if the sound eventually comes back. That could signify Either bad batches of bearings, poor geometry causing premature wear of the bearings, or even a loss of torque on the nut securing the top hat causing bearing wear.
The temperature related qualities of some of these clunks could be an indication towards the strut or pillow mounts. If your strut/bearing replacement leads to no noise returning, I think we can safely assume a strut issue. I will be just doing the bearings, so one of us should end up with positive results.
If we both get noise back, pillow mount...