You need to have a cooling system pressure test to determine as to where it is leaking now. Repair the leak and it should be okay.
No. It will cause a problem with both back pressure and noise.
I've had that before, and it is generally air in the lines, caused by a clog.
Take it to the garage and have them check for a cracked rotor or a loose caliper.
What would cause a grinding noise after a tire is replaced and the brakes are not worn?
If it is coming from the radiator or the hoses this would mean your antifreeze is boiling in the lines. I would recommend first changing the thermostat and bleeding the air from the rad lines.
never mind it is a faulty gas cap
I think it is the massive pressure of the water being let out at such fast speed that it makes a squealing noise
A whistling noise indicates a vacuum leak.
cold engine
Brakes
Power Steering?