Parts for your 2013 Suzuki Splash-Radiator cap

Does a 2013 Suzuki Splash have a radiator cap?

Short answer: not on the radiator. Technical references for the model show that the 2013 Suzuki Splash (K12B 1.2‑litre petrol) uses a sealed, pressurised expansion/header tank with a pressure cap, rather than a traditional cap on the radiator neck. This layout is shown in the 2013 Suzuki Splash Owner’s Manual (Cooling System section), Suzuki K12B service literature, and the related Opel/Vauxhall Agila B workshop documentation, all of which depict coolant filling and pressure control via the reservoir cap, with no filler neck on the radiator itself.

Why there’s no “radiator-cap” on this Splash:

• Packaging and bonnet height: Modern front-end design puts the radiator low, the highest point of the cooling system is the remote header tank, so the cap goes there.
• Better air purging: A header tank helps separate air from coolant and simplifies bleeding after service.
• Safety and serviceability: Keeping the pressure cap away from hot radiator cores reduces burn risk and makes level checks easy when the engine’s cold.
• System control: The reservoir cap is the pressure cap (typically around 1.1 bar), managing expansion and return flow through the overflow port.

For owners searching “2013‑suzuki‑splash radiator-cap”, the relevant part to inspect or replace is actually the coolant reservoir (expansion tank) cap. If there are signs of unexplained coolant loss, hard upper hoses shortly after start-up, or a sweet smell under the bonnet, a weak reservoir cap can be the culprit. A cooling system pressure test and cap test will quickly confirm if the cap isn’t holding pressure.

Basic care tips for the Splash’s reservoir cap:

• Only remove the cap when the engine is fully cold. Hot systems stay pressurised and can spray.
• Inspect the rubber seals for nicks, flattening, or hardening, replace the cap if any doubt.
• Use the correct rated cap for the K12B Splash, mismatched pressure ratings can cause overheating or hose damage.
• If the coolant looks rusty or sludgy, plan a full flush and refill with the specified long‑life coolant, then recheck for leaks under pressure.

References: 2013 Suzuki Splash Owner’s Manual (Cooling System), Suzuki K12B Engine Service Manual, and Opel/Vauxhall Agila B Workshop Manual. These sources detail a pressurised expansion tank design and no radiator-mounted cap for this platform.

Does the 2013 Suzuki Splash have a traditional radiator cap?

No. It uses a pressurised expansion tank with a screw-on pressure cap. The radiator itself has no filler neck or cap. Coolant is filled and pressure is controlled at the reservoir.

Where should coolant be topped up on a 2013 Suzuki Splash?

At the expansion (reservoir) tank. With the engine cold, top up to the “FULL” or “MAX” mark using the specified coolant mix. Never open the reservoir cap when hot.

What pressure cap does the Splash use, and when should it be replaced?

The reservoir cap is typically around 1.1 bar. Replace it if the rubber seal is damaged, if the system won’t hold pressure during a test, or if there’s recurring coolant loss with no obvious leaks. It’s an inexpensive part that can prevent bigger overheating issues.