Odd noise in the cold?

[cool user name]

Hi all again, my 89 CV makes this boiling water like noise when the engine is cold does anyone know what this could be?

[cool user name]

well its more like water boiling in a tea pot but not as high pitched

[87_crown_vic]

sounds like air in the cooling system flowing through the heater core or the heater core is blocked some and having coolant forced through it. is noise from passenger side behind glove box?

[trwp72]

Mine sort of does that... but more of a gurgle.... or water running around on the floor... but no leaks... usually stops when I run the car with the cap off for a while... after the thermostat opens up... then I top it off... then it doesn't do it for a while... until it gets a little low....

[1987cp]

My experience is that it's not unusual to hear water gurgling in the heater core when the car is cold. Sort of like the AOD shifting late and shock absorbers taking a little while to limber up, it just happens sometimes and there's nothing in particular to worry about.

Definitely a good thought to burp and top off the cooling system, though.

[cool user name]

yeah its behind the glove box

[86VickyLX]

Is the cooling system filled? Maybe it's making that noise since theres a little air or something in the lines.

[1987cp]

yeah its behind the glove box

Then that's all it is. Unless, of course, the heater core is toast, in which case the only thing to do is stock the fridge with beer and prepare for a long, miserable job. :p

[cool user name]

well....... what are the usual sighns of a tosted heater core

[1987cp]

Smell of antifreeze in the cockpit is usually a big one, plus your defogger becomes a fogger instead (sticky steam blows out and condenses on windshield). If it goes in a major way, you'll know immediately from the gush of hot coolant onto the floorboard.

[cool user name]

ok cool well that hasnt happend yet so........cooool

[86VickyLX]

My car makes this noise too sometimes. It's the blower motor. Try shutting it off and see if you still hear the noise. Normally does it when it's cold.

[87_crown_vic]

hmmm... as mentioned by gadget in past posts... remove a coolant line from the EGR spacer connected to the throttle body since it is highest point of coolant system to let the air out while filling it.