On a 1998 Lincoln Continental :
The thread on cap on your engine coolant reservoir is the pressure cap /
radiator cap . The engine coolant reservoir is in your engine compartment ,
towards the passenger side of the engine compartment
On a 1995 Lincoln Continental : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
On a 1998 Lincoln Navigator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 2000 Lincoln Continental : The engine coolant reservoir is in the engine compartment . It is on the PASSENGER SIDE OF THE ENGINE COMPARTMENT and has a thread on cap on the top of the tank ( which is the pressure cap / radiator cap )
On a 1997 Lincoln Continental : The thread on cap on the engine coolant reservoir is the radiator cap / pressure cap according to one of Fords websites , it is Motorcraft part number ( RS-85 ) a 16 PSI cap
I believe your coolant reservoir has a thread on style cap which is the " rad " cap
I'm not a mechanic / technician but I believe if the engine coolant reservoir has a screw on pressure cap / radiator cap it is called a Degas Bottle . In the case of the 1999 Lincoln Continental , the engine coolant reservoir is in the engine compartment ( on the passenger side of the vehicle )
On a 2003 Lincoln Aviator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 2001 Lincoln Navigator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 2005 Lincoln LS : ( the thread on cap on your engine coolant reservoir is the pressure cap / radiator cap ) * the engine coolant reservoir is on the drivers side of the engine compartment , by the firewall
On a 1998 Ford Taurus : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1994 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1997 Lincoln Town Car : The thread on cap on your engine coolant reservoir is your pressure cap / radiator cap