Location of cooling system bleeder valve

pressure in motor will help push out air to bleeders

locate the coolant temperature sensor nearto the thermostat housing. Unplug, loosen then plug back up. To bleed, loosen slightly to release trapped air. Once air is relieved, only liquid will come out at this time the air bleeding is done.

Those valves sound like fuel pressure test ports. Press down the center of valve and see if gas comes out. If it does, those valves are on the fuel rail, not in the coolant system.
A bleed valve is a bit different. Looks kind of like a grease zerk, with a small hole on its little round head. You put a small wrench on the valve and turn it as if loosening it, but only a turn or two to open it and let coolant or air out the hole on the valve. Look for it on or just close to the thermostat housing.
If you have no bleed valve, best practice is to fill radiator and overflow tank, then start car with the radiator cap off, and let engine run until the thermostat opens (upper radiator hose will get hot when thermostat opens). Now turn off engine and replace radiator cap. This usually gets all the air from coolant system, but sometimes you have to do it again.

On Ford you have to bleed the system of air in the cooling system there are several ways to do it, Here is the easy way withe the vehicle cool to touch open the top radiator hose add the coolant or water through there

If you have a blown head gasket, surely you will overheat because some hot combustion gases are entering your cooling system. No way you can remedy it by bleeding the system. Bleeding the system is just removing the trapped air in it. Running the engine with out the radiator cap will do the trick.

Automotive cooling system has no bleeder valve. Removing trapped air (bleeding) from the system is done by loosening the upper radiator hose with the engine running, and letting some coolant to ooze out. If the coolant coming out already has no bubbles with it, then you already expelled out the trapped air. Simply running the system with out the radiator cap will also do the trick.

1. This method works best if the nose of the car is raised as high as possible. Park your car in your driveway. Let your car cool down. When your car is cooled down, you are ready to work on the cooling system.
2. Open the hood of your car. Secure the hood with the safety handle. If you have a newer car, you should have a bleeder valve on the front of your radiator. Check in your owner's manual for the location of this valve. If you do start your car, open the valve with wrench and let your car heat up. The excess air will bleed out of your cooling system. Keep your car on long enough to give the (trapped air) time to bleed out of your system.
3. Let your car cool down. Once the car is cool, take off the radiator cap. Did the level of the radiator fluid go down? If it did, it means you bled the air out of your cooling system. Replace the radiator fluid, turn on the car, and let it run. Replace radiator fluid as needed.
4. Step 3 (above) is the way you will remove air from your cooling system if you do not have a bleeder valve on your radiator. You will leave the cap off the radiator. You will run your car until it heats up. As the air dissipates, the radiator fluid level will go down. You will fill up your radiator fluid to the correct level. Be careful because the heated radiator fluid will be hot. Always wear leather gloves and safety goggles when working on your radiator.
5. Once the air dissipates and you fill the fluid, shut off the car. Let the car cool down. Once the car is cool, put the radiator cap back on the radiator. You may have to put more radiator fluid in the radiator. The level may fall as the car cools down. Now it is safe to drive your car. You have removed the trapped air from your cooling system.
   

Look for bleeder valves somewhere on the top of the cooling system. If you see any use them to remove trapped air. Start the engine and slowly turn the screw to remove trapped air. If there are no bleeder screws then remove the radiator cap from a cool engine. Make sure the radiator is full. Start the engine and watch for escaping air bubbles. Keep the radiator full at all times. When the engine reaches close to full operating temperature and you see no more air bubbles escaping put the cap back on. You may have to do this one more time if you experience any more trapped air in the system. Just make sure to look closely for bleeder valves. They will look like tire valves with a cap.

Fill the resovoir full of coolant then put the cap on. Start the car and let the tempture get about 160 -190 depending on your thermostat. Then proceed to turn the motor off. While the motor is off locate the bleeder valve that is loacted on a metal pipe that runs to the side of the head, Slowly turn the bleeder valve between 3/4 to a full rotation then begin to let the system bleed until there is a steady stream of coolant exiting the valve. Start the vehicle again and repeat till resovoir is full and there is absolutley no air in the system. Failure to do so will result in vapor lock and ultimatley coolant system failure

It is usually located on either the thermostat housing or on the highest point in the cooling system top radiator hose housing going into the engine. Run the motor for approx. ten minutes then turn heater on high unscrew bleeder 3/4 of a turn and then turn back in when coolant squirts out. Repeat after 5 more minutes of run time.