I managed to rotate the remaining part a bit with some pliers but it.
Ford coolant cap stuck.
If it s not opened up enough the internal o rings dry up and hardens and coolant crusts up the cap and cause the lip that on the piece that is stuck in the reservoir to let go and all you get is the upper part.
How to determine if your radiator cap is bad p2181 duration.
All you have to do is to wait until it is cool down then use your palm to pound on the cap a couple of times to loosen up the sticky cap push down while you are turning it should be coming out easily.
Removed the expansion tank cap on lady targ s 2010 fiesta and the cap came apart with half of it stuck in place in the tank.
Less resistance might come from a few squirts of your favorite spray penetrant up under the 2 folded under ears that wrap under the neck flange.
Allowing the car to sit for around 30 minutes will ensure the pressure and temperature has dropped to a safe level before you attempt to remove the radiator cap.
I normally wet the o rings with a smear of something when i open one up to prevent what you have.
You want to turn the radiator cap counterclockwise to open it but it is stuck.
The first broken part on our ford escape replaced coolant reservoir duration.