I'm having a strange squeal for a while now on my left front brake.
When I drive in the city at +- 30 km/h and slightly turn the steering wheel. Like very very slightly, I get an intermittent squeal without touching the brake pedal. It's usually worse when I've driven the car for a few km already and used the brakes a few times. I've had this problem last year already and reinstalled the calipers and pads a few times. I've putten on copper grease on the back of the pads, and then the squeelling would stop for a week or three, and then it starts again. It doesn't get worse or anything.
I'm pretty sure the discs are straight. I didn't clock them but I never feel vibrations when braking. I checked the disc tolerances which are within spec. I changed all the rubber seals inside the caliper and that didn't help. I'm guessing the return hole or the brake line itself? But does the return hole work for both front calipers or only one caliper?
Advice would be greatly appreciated.
Thanks in advance.