i got the same thing. i had the same gurgle sound, along with the up and down temps, tried burping. still the gurgling. gurgle is directly influenced by throttle in my heater core. by that i mean whenever i step on the gas there is a surge of air or air/ fuel or exhaust being forced into the coolant flow and it's manifest in the sound i hear when the climate control is set to heat. i'm gonna drive it till it hydro-locks on me or blows white smoke. could last a while...right? <img src="/forums/images/graemlins/zombie.gif" alt="" />

'95 runner 3vze/r150f