The thread on cap on your engine coolant reservoir is the pressure cap /
radiator cap
On a 2001 Ford Focus : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
On a 2001 Ford Expedition : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
The 2001 Windstar has no radiator cap. It has an antifreeze bottle.
On a 2001 Ford E-150 : The thread on cap on the engine coolant reservoir is your pressure cap / radiator cap
On a 2001 Ford Expedition : The thread on cap on your engine coolant reservoir is the ( 16 PSI ) pressue cap / radiator cap
There is one but underneath the frame on the radiator.
The thread on cap on the engine coolant reservoir is the pressure cap ( radiator cap )
On the overflow bottle. It's the only one.
If the cap on the Resoivoir twist or turns on says DO NOT OPEN HOT and there is no cap on rad then this is where you fill it at.
To drain the radiator in a 2001 Focus, loosen the cap on the top of the radiator overflow tank. Then loosen the lowest radiator hose on the radiator. Drain the antifreeze into a bucket to prevent ground pollution. Be careful, if the engine was recently running. The liquid will be hot.
The raiator is a type of system where all fluid is added to the reservoir instead of the radiator directly, look for the reservoir and you will have found your radiator cap.
Remove the radiator cap and add it directly to the radiator. Then fill the overflow reservoir to the full mark.