Parts for your 2015 Ford Territory-Radiator cap

2015 Ford Territory radiator cap — is there one?

For the 2015 Ford Territory (SZ MkII, petrol and diesel), a traditional radiator cap on the radiator itself isn’t fitted. Instead, the cooling system uses a sealed, pressurised expansion/degas bottle with its pressure cap mounted on that bottle. Technical sources that confirm this include: Ford Territory SZ/SZ MkII Workshop Manual (Section 303-03 Engine Cooling) diagrams showing the remote degas bottle and no filler neck on the radiator, the 2015 Ford Territory Owner’s Manual instructions that direct coolant filling only via the expansion tank cap, and Ford Australia parts catalogues that list a coolant reservoir cap but do not list a separate radiator neck cap.

Why no old-school radiator cap? The Territory’s system is designed as a “degas” layout. By moving the pressure cap to a high-mounted expansion bottle, air separates more efficiently from the coolant, filling and bleeding are cleaner, and the radiator can be built without a filler neck, improving packaging under the bonnet. It’s also safer for owners and technicians: the cap sits away from the radiator and fans, and the system encourages people to open the cap only at the designated bottle when the engine is cold.

What should owners look after instead? The expansion tank cap is the pressure control point for the whole system. If its seal hardens or the spring weakens, the Territory can lose pressure, run hotter, or push coolant into the overflow. Typical clues include a sweet coolant smell after driving, visible crusting around the bottle neck, hoses that collapse as the engine cools, or a tendency to vent into the overflow. Given age and heat cycles, many workshops treat the cap as a low-cost preventive replacement during cooling-system service—especially on higher‑kilometre vehicles or after any overheat event.

Basic care tips:

• Only open the cap when the engine is stone cold.
• Top up via the expansion bottle to the COLD mark with the coolant type specified on the cap/owner’s manual.
• If overheating, leaks, or pressure issues are suspected, have the cap pressure-tested and replace if it doesn’t hold spec (often around 140 kPa/20 psi, check the marking on your cap).

FAQs

Where is the radiator cap on a 2015 Ford Territory?
There isn’t one on the radiator. The only cap is on the plastic coolant expansion/degas bottle in the engine bay. That cap is the system’s pressure cap and the correct place to add coolant when the engine is cold.

What pressure rating should the Territory’s cap have?
Most 2015 Territory caps are marked around 140 kPa (20 psi). Always match the rating printed on your existing cap or use the OEM-specified part for your engine variant.

When should the cap be replaced?
Replace it if there are signs of leakage, if a pressure test shows it won’t hold spec, after any significant overheat, or proactively during cooling-system servicing on older/high‑kilometre vehicles. A fresh cap is inexpensive insurance for stable operating temperature.