Weird sound coming from pass side dash (possible heater core issue?)
I have had my 02 WJ for about a year and a half now, and half been lucky enough not to have any problems until now. When I start my jeep I hear what sounds like fluid rushing through my dash (mostly on the pass side, maybe behind my glove box). When I step on the gas, it sounds like the fluid is rushing faster, and about a min or two later it is gone. It seems to only do it after the jeep has been sitting for a while like overnight or when I get out of work. I have no leaks inside or on the ground under the jeep. My heat and AC both work fine. I am completely stumped on this, and thoughts would be very helpful. Oh, and I have the 4.7l motor with the standard heating controls.