It's the thread on cap on the engine coolant reservoir
On a 1997 Ford Taurus : 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
The 1999 Ford Taurus does not have a radiator cap. Coolant is added by using the over flow bottle instead of a radiator cap.
On a 1997 Ford Taurus 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 Taurus : ( the thread on cap on your engine coolant reservoir is the 16 PSI pressure cap/ radiator cap )
On a 1998 Ford Taurus : 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
The thread on cap on your engine coolant reservoir is your pressure cap / radiator cap ( 16 PSI ) on a 1996 Ford Taurus ( all engines )
For a 2002 Ford Taurus : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap ( I believe the Motorcraft part number is RS-103 ) it's a 16 PSI cap
The thread on cap on your engine coolant reservoir is the " radiator " cap
Overflow tank only