Sound Coming from Dash

[etperez22]

Hello All,
I have a 1992 V6 4Runner with 226k on it.

Recently had the timing belt/water pump replaced. Now since it is getting a little colder in the Pacific Northwest I am starting to use the heater.
I have noticed that there is a gurgling water sound coming from the dash. It only happens when I accelerate and when the heater temp is on the "red" (hot) side.

All my fluid coolant level is good. I even "burped" the system by putting the heater on full blast, removing the radiator cap, and letting the car up to temp.

Any Ideas?

 

[freshley]

2001 4runner with water sounds

I have a 2001 4runner that is doing the exact same thing. When I accelerate with the heater on it makes a gurgling noise from behind the dash on the passenger side. It really has me stumped as it wasn't doing this before.
Anyone have any ideas?

 

[coreman23]

I used to have an '86 truck that did the same thing, I never did find out what it was, but it never harmed anything, it finally threw a rod at over 300k.

 

[ozzyleven]

I'd try to burp the coolant some more. I'm pretty sure that the 'running water' sound is air in the coolant lines. Try parking the front end on a curb or something and then squeeze the upper rad. hose as you burp it. Last time I drained the coolant, it took multiple tries to get all the air out.