98 f150 4.6 4x4 supercab

i hear water trickling when i slowly accelerate i hear it in the dash maybe inside of the heater core, sounds like water is trickling in a chamber of sort. doenst sound right never heard it do that before. is it becuz its getting cold out or what? is the heater core going out i have heat and everything works fine all gauges are fine. HELP

foto of my truck is under (divewithtom)

 

Is your coolant level low?

 

Check out the drip tube on the firewall. it allows accumulated water to drain out of the heater plenum. If cloged it will keep the water in. It is on the passenger side below where the heater hoses enter the cab.

Regards

Jean Marc Chartier

 

I had the same problem on my '03, and when I took it to the dealership, they were too lazy to work on it, and told me to turn the heater on high and let it run for about 5 minutes, then it should take care of the "sloshing sound." Give it a try if you want a quick fix without disabling anything, it worked for me.

-Lupe

 

For me that sounds has always meant low coolant level and air in the cooling system.

 

my 1990 f150 does the gurgling thing when the coolant level is low too