Pro/Forums - View Single Post - Argg... air keeps on getting into my system!!!

Sanjuro · 07-13-2002, 03:12 AM

I could be wrong, but this is what I think is happening: Everytime the cooling system is in use (or just with the pump on even) water temp would be higher than the surrounding air, which means water is gonna evaporate and mix with the air in the airtrap. Now since everything expands, the extra stuff has to go somewhere. Most likely moisture will escape from a weak point of the cooling system, either a bad radiator solder point or following the thread of hose barbs. When the system cools down from less usage, it then sucks air back into the loop via the same path. So over and over coolant will be lost. Secondly, there is always cavitation. Basically at the tip of a spinning impeller water pressure drop is usually real big, therefore a TINY amount of water gets to a point that they can boil at room temperature. (This is what happens with ship impellers. The bubble they make don't just appear out of nowhere!) When they boil they become water bubbles, then either they stay with the coolant loop or they push coolant out of the system because of their added volume. Again, I don't know if i'm correct, but thats my $0.02

07-13-2002, 03:12 AM	#3
Sanjuro Cooling Neophyte Join Date: Sep 2001 Location: Port Coquitlam, BC Posts: 74	I could be wrong, but this is what I think is happening: Everytime the cooling system is in use (or just with the pump on even) water temp would be higher than the surrounding air, which means water is gonna evaporate and mix with the air in the airtrap. Now since everything expands, the extra stuff has to go somewhere. Most likely moisture will escape from a weak point of the cooling system, either a bad radiator solder point or following the thread of hose barbs. When the system cools down from less usage, it then sucks air back into the loop via the same path. So over and over coolant will be lost. Secondly, there is always cavitation. Basically at the tip of a spinning impeller water pressure drop is usually real big, therefore a TINY amount of water gets to a point that they can boil at room temperature. (This is what happens with ship impellers. The bubble they make don't just appear out of nowhere!) When they boil they become water bubbles, then either they stay with the coolant loop or they push coolant out of the system because of their added volume. Again, I don't know if i'm correct, but thats my $0.02 __________________ Nothing to call home about...