Your compressor is going out. Probably you threw a piston in the compressor or the bearings in your clutch went out. If you put freon in before this happened you overfilled it and blew the seals.
No. Excessive pressure will not cause the water to boil off quickley. It will cause the radiaor hose or other components to burst causing loss of coolant. A bad radiator cap can cause high or low pressure; low pressure will cause the coolant to boil at a lower temperature.
LOW AIR PRESSURE IN YOUR TIRES loose accessory belts such as alternator can squeal
Yes, if it is not holding pressure or is allowing a coolant leak.
A worn belt will cause a squealing noise. The squealing noise is caused when the belt slips. Tightening the belt will temporarily fix the problem.
Check the belts. The most common cause of squealing is a worn or loose belt on the front of the engine.
First thought is low air pressure in the tire. Second is an alignment problem or a brake that is locking up.
I think it is the massive pressure of the water being let out at such fast speed that it makes a squealing noise
The coolant is designed to exchange heat when pressurized. Lose the pressure and the coolant loses it's ablility to retain high temperatures. Of course you're loses the pressure through the crack in the head.
lack of oil
When refilling the oil some may have dripped onto the belt which would cause it to start slipping badly and squealing loudly.
A loose or glazed "fan belt" is a very common cause of squealing. A quieter squeal is produced by brake linings that are almost worn through.
cause they don't want to die