Parts for your 2020 Suzuki Splash-Radiator hose

2020 Suzuki Splash radiator hose — purpose, care and when to replace

Yes, a radiator hose is absolutely fitted and relevant on the 2020 Suzuki Splash. Technical sources including the Suzuki Splash/Ritz Service Manual (Cooling System, K10B/K12B engines), the Suzuki Electronic Parts Catalogue, and reputable aftermarket catalogues (Gates, Dayco, Mackay) all list formed upper and lower radiator hoses, plus heater hoses, for this model line. Those liquid‑cooled 1.0‑litre and 1.2‑litre petrol engines rely on hoses to move coolant between the engine, thermostat housing, radiator and heater core.

On the Splash, the radiator hose network is the unsung hero that keeps engine temperatures steady, whether it’s a chilly South Island morning or a scorching Aussie arvo. The upper hose carries hot coolant from the engine to the radiator, the lower hose returns it cooled, and the smaller heater hoses feed the cabin heater. They’re moulded EPDM rubber to handle heat, pressure and vibration, but like any rubber, they age.

As part of routine servicing, it’s smart to treat hoses as both kilometre‑ and time‑based items. Even if kilometres are low, rubber hardens and softens with age and exposure to oil. A practical rule of thumb is inspection at every service (about 10,000–15,000 km) and replacement around 5–7 years, or earlier if there are any signs of trouble.

• Lift the bonnet and check for bulges, soft spots, cracking, glazing, fraying at the ends, oil swelling, crusty coolant traces, or hose‑to‑hose/body rubbing.
• Squeeze when the engine is cold, a healthy hose feels firm and resilient, not mushy or rock‑hard.
• If replacing, match the formed shape for the Splash’s K10B/K12B layout, fit new clamps (spring clamps are fine, worm‑drive types should be snug but not crushing), and orient them for easy future access.
• Refill with the correct coolant (Suzuki Super Long Life Coolant, blue). If using concentrate, mix 50/50 with demineralised water. Bleed air by running the heater on HOT and topping up after a cold check the next morning.
• Dispose of old coolant responsibly, it’s toxic to pets and the environment.

Watch for sweet coolant smells, visible drips, steam, a low reservoir, rising temp gauge, or the radiator fan running constantly. If a hose pops or splits, stop the car promptly—overheating can cook the head gasket. Using quality OEM or well‑known brands helps, and replacing upper and lower hoses together is a tidy way to reset the clock on cooling‑system reliability.

How often should the 2020 Suzuki Splash radiator hoses be replaced?

They should be inspected every service (about 10,000–15,000 km) and typically replaced every 5–7 years, sooner if there’s cracking, swelling, softness or leaks. High‑heat or stop‑start city use may shorten that interval.

What are the warning signs a Splash radiator hose needs attention?

Look for bulges, splits, white or green crust near clamps, a sweet coolant smell, low coolant level, overheating, or steam under the bonnet. Any of these means it’s time to repair before damage escalates.

Which coolant should be used after a hose change on a Splash?

Use Suzuki Super Long Life Coolant (blue) or an equivalent OAT coolant meeting the same spec. If it’s concentrate, mix 50/50 with demineralised water. Always bleed the system and recheck the level when cold.