Brakes knocking a bit on turns

Hi all!

My brakes knock a bit (non metallic sound) when I brake and turn at the same time. The outer clamp of the brake moves a little so I went to a mechanic.
He was a non-toyota mechanic that's why I want to make sure here cause he said it's normal.
Reason for the knocking is heat and the fact that you have to turn to hear it. The brake clamp is on two moving pins and it makes sense for me that sometimes they will move to sides too.
Did you guys experienced anything like that?

When I brake with wheels pointed forward there are no sounds.

 

Yeah, yeah ... pick on non-english person for making mistakes, real mature

 

I don't want to point fingers but did you meant "... he was ..." or was it supposed to be "... you were ..."?

 

I got about 86'000 miles.
I don't think I heard that before. I usually brake before the turn but lately I've been driving more "aggressive" just to see how the car reacts. Maybe that's why I didn't hear that before.
We had a long and hot summer this year and front pads and discs were changed a year ago.

 

I've been to Toyota dealer. They said that the break pads are close to the moment when I'll need to replace them so I'll just do it right away since I'll be doing a long trip soon.

 

Here it's going to be 80 € for pads and 40 € for work.
I would do it myself and I even tried but the pins that the caliper slides on are so stuck I can't get them off and I can't use too much force cause my only means of lifting this car is a jack and I'm afraid I'll tip that jack over when fighting with those pins.

 

In sum it eventually went down to 111 € cause the mechanic did it faster than anticipated.
I had front discs changed at the end of February this year but not by Toyota, so maybe they overtightened the bolts, I don't know.
I too partially take responsibility cause I probably overheated them a lot since I was testing some aggressive driving to see how the car handles it. It's stiff and clearly made to be driven like an 80 yo grandpa would. Don't get me wrong, I like driving like an 80 yo grandpa but it would be nice to know that I have more "choices"
I got those safety stands too but I imagine if those stands miss the correct support edge while the car is falling of the jack, I will get new ventilation intake in the floor
Next time if it will come off by hand, I'll do it myself otherwise I'll look for someone with a lift that mechanics have.

Also, there are no more noises from the brakes.