Parts for your 2015 Ford Kuga-Radiator cap

2015 Ford Kuga radiator-cap: what’s fitted and what to service

Based on Ford’s own technical literature, a traditional radiator cap on the radiator itself is not used on the 2015 Ford Kuga. The Ford Kuga Owner’s Manual for this model year instructs owners to check and top up coolant only at the translucent coolant expansion tank and warns against removing the coolant pressure cap when hot, it does not direct servicing at the radiator. Ford’s Workshop Manual (WSM) Section 303-03 (Engine Cooling) for the 2013–2016 Kuga/Escape range specifies a sealed, pressurised cooling system with a remote degas (expansion) bottle carrying the pressure relief cap, while the radiator has no fill neck. Motorcraft parts listings for this generation likewise catalogue a coolant pressure cap for the degas bottle, not a radiator-mounted cap. Put simply: the Kuga runs a pressure cap on the expansion tank, not on the radiator.

Why no radiator cap? The Kuga’s modern cooling layout uses a remote degas bottle that:

• Moves the pressurised fill point away from the hottest parts, reducing burn risk and improving access under the bonnet.
• Improves air separation and deaeration, helping protect the water pump and maintain stable coolant flow.
• Allows the radiator to be a sealed unit without a fill neck, aiding packaging and reliability.
• Provides a single service point for checking level and pressure control.

For servicing this vehicle, the relevant part is the coolant expansion tank pressure cap. Its job is to hold system pressure (typically around 138 kPa/20 psi as stamped on the cap used in this platform) and then relieve excess pressure safely back to the bottle, while a small vacuum valve lets coolant return as the engine cools.

Good workshop practice on a 2015 Kuga includes:

• Inspecting the cap seal and threads every service for nicks, flattening, or crusty residue.
• Confirming the pressure rating on the cap matches the vehicle spec.
• Replacing the cap if there’s coolant odour, unexplained coolant loss, visible weeping around the cap, frequent overflows, or a collapsed upper hose after cool-down (a sign the vacuum valve is sticking).
• Only removing the cap when the engine is completely cold, refitting hand-tight until the detent clicks, not over-torqued.
• Using the correct Ford-approved coolant and bleeding via the expansion tank per the WSM after any cooling system work.

This approach keeps the Kuga’s sealed cooling system healthy and helps prevent hot-running, aeration, and hose damage.

Popular questions

Does the 2015 Ford Kuga have a radiator cap?
No. The 2015 Kuga uses a sealed radiator and a pressurised cap on the coolant expansion (degas) bottle. The reservoir is the only approved fill and check point.

What pressure rating should the Kuga’s coolant cap be?
Most 2013–2016 Kuga/Escape models use a cap around 138 kPa (20 psi). Always confirm by reading the stamping on the existing cap and checking the vehicle handbook to match the correct spec.

When should the coolant cap be replaced?
There’s no fixed interval, but replacement is recommended if there are leaks, pressure test failures, recurring overflow, coolant smell, or hose collapse after cool-down. Many workshops treat the cap as a preventative replacement around the 5–7 year/100,000–150,000 km mark if symptoms appear.