Is it normal to hear water, or whatever it is, running through the heater core? I hear it gurgeling when I am at idle. I assume it is doing it all the time but I just can't hear it over the engine and air noise. But is this normal? Do any of you experience this as well? --GoatBoy

My Car did the Same Thing When i Had an Airbubble in the coolant, park your car on a slight up hill and run it till its warm with the radiator cap off, squeeze the upper radiator hose and the air should work its way out, this is how i do it, maybe someone else around here has another way

That makes sense. It sure is an interesting sound!!

Yeah, I gotta do the same thing tommorow.. When you do it, the trick is to SLOWLY pour in antifreeze.. Make sure your heater fan is on full blast and you have it on hot air Vent...