Wher would a "bleeder screw be located?

A bleeder screw is small brass screw in the coolant system at a high point. Some engines have them, some don't. Fill the reservoir, heat up the engine a couple of times and check the fluid level. If you're still hearing heater core noises, look for a screw at the high point. Some Fords have them on the thermostat housing.

I did as suggested and it seems to be gurgle free. Thanks

Type of vehicle would help with answer. Some vehicles use bleeder screws others wanted to save the .05 cents so they don't use them. Fords are notorius for large air pockets after cooling system drain/refill and have no bleeder screws. One trick is to raise the front of the vehicle as high as possible to force the air to the top (fill location) and use the no spill funnel with vehicle running - heat on. The best way is to get a vacuum on the system and then fill it from a five gallon bucket of your coolant, the tool that does this works perfect leaving no air and no mess. 30 yrs master mechanic Michigan. links for tools here- https://www.amazon.com/gp/product/B0002SRH5G/ref=oh_au i_search_detailpage?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B00A6AS6LY/ref=oh_aui _search_detailpage?ie=UTF8&psc=1

I have an 06 ford escape xlt and I had no problems with it until it overheats on day..after continuously adding more coolant I discovered a Crack in my radiator so I got it replaced immediately with the thermostat. And my truck is still overheating and now I have no heat. After some research I learned I could have air in the coolant system but idk how to be sure or how to bleed it. In need of some tips or video links asap. Thanks

Following the car manual; First time. 1- Fill the engine coolant level . 2- Select the maximum heater temperature and blower motor speed settings. 3- Start the engine and allow to idle until normal operating temperature is reached. 4- You will feel for hot air at vents. 5- Stop engine, 6- allow to cool enough . Second time. 7- Adjust cooling system level. 8- Select the maximum heater temperature and blower motor speed settings. 9- Start engine and allow to idle until normal operating temperature is reached. 10- Hot air should discharge from vents. 11- Shut the engine off. 12- allow the engine to cool enough. Final 13- Final Check the for coolant leaks. 14- Check the engine coolant level in degas bottle and fill as necessary. Taher Mansour