On a 1998 Lincoln Navigator :
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
The thread on cap on your engine coolant reservoir is the pressure cap ( radiator cap )
I believe your coolant reservoir has a thread on style cap which is the " rad " cap
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 2003 Lincoln Aviator : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1995 Lincoln Continental : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
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
On a 1994 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1998 Ford Taurus : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1998 Ford Expedition : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap