Sound like a fan motor bearing about to fail, lack of lubrication on that bearing, you could try spraying a bit of WD40 into the air intake, but a new bearing/motor is the real solution, sounds expensive in terms of labour! is it under warranty? Phil.
you have a bad alternater or belt
either your belt(s) or brakes most likely
if screeching only when backing up, it sounds like you have a problem in reverse gear in transmission or you have a problem with loose pinion in differential
When they don't feel like making noise and at night.
Lubricate.
making
Bleeding the air from them usually helps.
Unplug it.
either replace them or add motor honey to go for a longer perion without noise....
I here this too but I'm in balston. This needs to stop, it really disturbs a nights rest. Anyone know where the source is?
Racket
u tell me