Parts for your 2010 Volvo Xc60-Radiator cap

2010 Volvo XC60 radiator-cap: does it have one, and what to check instead

Short answer: a traditional radiator cap isn’t used on the 2010 Volvo XC60. Instead, this model runs a sealed radiator and a pressurised coolant expansion (degas) tank with its own pressure cap. The cap you’re looking for is on the plastic reservoir in the engine bay, not on the radiator itself.

Technical sources that back this up include: Volvo’s 2010 XC60 Owner’s Manual (coolant section) noting the warning about the expansion tank cap, Volvo VIDA service information for the P3-platform cooling system describing a remote, pressurised degassing tank, Volvo’s genuine parts catalogue for MY2010 XC60 showing an expansion tank and cap but no radiator filler neck, and common aftermarket catalogues that list a reservoir cap rather than a radiator cap for this vehicle.

Why Volvo doesn’t use a “radiator cap” here comes down to cooling-system design. By moving pressure control to a high-mounted expansion tank, the system de-aerates more effectively, maintains stable pressure and boiling margins, and removes the need for a filler neck on the radiator. It’s safer too: owners aren’t tempted to open a hot radiator, and the plastic radiator can be fully sealed for durability.

If someone’s chasing a 2010 Volvo XC60 radiator-cap for servicing, what they actually need is the expansion tank pressure cap. It does the same core job—holds pressure so the coolant’s boiling point stays higher—and it vents if pressure exceeds its rating. Over time the rubber seal and spring can tire, which can cause slow coolant loss, random overheating, or that sweet coolant smell after a drive.

• Only open the expansion tank cap when the engine is stone-cold. Under the bonnet, crack it slowly to release any residual pressure.
• Inspect the cap’s O-ring and seating surface, replace the cap if the seal is flattened, cracked, or crusty.
• Typical cap rating is about 140 kPa (1.4 bar). Always match the rating printed on the original cap and use quality parts.
• If there’s repeated “low coolant” messages, unexplained loss, or hose collapse after cool-down, pressure-test the cap and replace if it fails.

Technical sources referenced: Volvo XC60 (2010) Owner’s Manual – Coolant/Expansion tank cautions, Volvo VIDA – Cooling system, General information/Design (P3 platform), Genuine Volvo Parts Catalogue (MY2010 XC60) – expansion tank and pressure cap assembly, aftermarket fitment guides noting reservoir cap location.

Popular questions

Where is the radiator cap on a 2010 XC60?
It doesn’t have one on the radiator. The pressure cap is on the coolant expansion tank, typically on the right-hand side of the bay. Look for the translucent plastic reservoir with MIN/MAX marks.

What pressure cap does the 2010 XC60 use?
Most 2010 XC60s use a cap around 140 kPa (1.4 bar). Check the rating printed on your existing cap or confirm with a VIN-based parts lookup to match your exact engine variant.

When should the cap be replaced?
There’s no fixed interval. Replace it if the seal looks tired, if you smell coolant after driving, see dried pink/white residue around the tank neck, get intermittent overheating, or fail a pressure test. It’s a quick, inexpensive fix that can prevent bigger cooling dramas.