Liquid sloshing sound

[The Wok]

Any of you guys get that liquid sloshing around sound that comes from behind the sunglasses box? Do I need to add some more coolant?

[Bling]

Yes you need to add some coolant.

[Impulse]

Air bubbles in the heater core. I had the same sound. What I did to get rid of it was inder the engine plastics behind the radiator is a white plastic canister to hold any over flow coolant. There is a plastic screw on the top of the canister that I untightend a little bit after I drove around for a while which let the air escape.. Just be careful not to get any hot coolant on you.