That is engine coolant rushing through the heater core. Things to check.
Engine coolant level in radiator and if it's not low then the only thing left is the heater hose quick disconnect fitting in the intake. There is suppose to be a small plastic water restricter down in the bottom of the quick disconnect fitting that is designed to slow the water up before it goes through the heater core. If that restricter is gone then replace the quick disconnect fitting.
Rumbling, gurgling sounds from the GI tract are called are called borborygmi. These sounds are caused by fluid and gas moving in the intestines.
Then unblock it UNLESS you like gurgling sounds
The presence of fluid and/or mucus, giving characteristic signs when listened with a stethoscope e.g. rales.
sounds like ya have a heater core leak . time to take her apart
rippling, gurgling, whisper, rustling, and hushed.
Onomatopoeia: Where sounds are spelled out as words; or, when words describing sounds actually sound like the sounds they describe. I heard him gurgling water.
Sort of a weird gurgling/grinding sound >_< like "errrrrr" lol
Common animal sounds that babies make during their early development include cooing, babbling, gurgling, and squealing. These sounds are important for language development and communication skills.
It sounds like it might be in your coolant system. heater core maybe? Or maybe a sticking thermostat.
Sounds like low coolant or air in the cooling system
Water flowing through a river can make a variety of sounds, such as splashing, gurgling, bubbling, and rushing. These sounds are created by the movement of the water over rocks and obstacles in the river, as well as the force of the current.
A heart murmurs is an abnormal sound consisting of a clicking, rushing, or gurgling noise that either is heard before, between , or after the normal sounds, or may may mask the normal heart sounds.