Parts for your 2008 Suzuki Splash-Thermostat

2008 Suzuki Splash Thermostat — Fitment, Purpose, and Service Advice

Based on factory and trade references, a thermostat is absolutely fitted to the 2008 Suzuki Splash. The Suzuki Splash workshop manual’s cooling system section depicts a wax‑pellet thermostat in a bolted housing, and the Suzuki Electronic Parts Catalogue lists a dedicated thermostat assembly for the K10B (1.0‑litre) and K12B (1.2‑litre) petrol engines, as well as the 1.3 DDiS diesel. Aftermarket catalogues from major suppliers (e.g., Gates, Mahle/Behr) also specify direct‑fit thermostats for this model, and the sibling Opel/Vauxhall Agila B (which shares the platform) is documented in Haynes service literature with the same component. So yes, the thermostat is relevant and used on the 2008 Suzuki Splash.

The Splash’s thermostat quietly does a big job. It regulates coolant flow so the engine warms up quickly, then holds a steady operating temperature. That steadiness helps fuel economy, keeps emissions tidy, and gives the cabin heater a proper kick on chilly mornings across Aus and NZ. Typical opening temperature is in the low‑to‑mid 80s °C, then it modulates to keep things on song.

When it’s healthy, owners see a quick warm‑up and a rock‑solid gauge reading once the car’s under way. When it’s crook, they’ll notice slow warm‑up, a heater that’s lukewarm, or the opposite — overheating and coolant boiling into the overflow. Some modern Splash variants may even log a P0128 (coolant temperature below thermostat regulating temp).

There’s no strict replacement interval, it’s condition‑based. That said, on higher‑kilometre cars or when tackling a cooling system service, swapping the thermostat and its O‑ring/gasket is smart preventative maintenance. Always match the OEM temperature spec and housing style, as some Splash engines use an integrated housing design.

• Check for symptoms: wandering temp gauge, poor heater, or overheating.
• Inspect coolant condition and level, pressure‑test if leaks are suspected.
• If replacing: allow the engine to cool, drain enough coolant, remove the housing, clean mating faces, fit a new thermostat and seal, torque the bolts evenly, refill with the correct Suzuki‑spec coolant mix, and bleed air from the system.
• Afterwards, verify fan operation, hose temperatures, and look for leaks under the bonnet.

Quality coolant is key — use the specification recommended for the Splash’s engine, mix correctly with demineralised water, and refresh it on schedule. A fresh cap, sound hoses, and a proper bleed can make the difference between an easy commute and a roadside cool‑down.

Where is the thermostat on a 2008 Suzuki Splash?

On the K10B/K12B petrol engines, the thermostat sits in a small bolted housing at the engine side of a radiator hose (often the lower hose), right where the hose meets the block. It’s typically a two‑ or three‑bolt affair. On the 1.3 DDiS diesel, it’s also housed in a dedicated assembly near the coolant outlet. Access is straightforward with basic hand tools.

What temperature does the Splash thermostat open?

Most Splash thermostats begin opening in the low‑to‑mid 80s °C and are fully open in the 90s °C range. Always choose a unit that matches the factory spec for the exact engine code to keep warm‑up, economy, and emissions on target.

Is it OK to drive with a dodgy thermostat?

It’s risky. A stuck‑open stat can cause rich running, poor heater performance, and higher fuel use, a stuck‑shut stat can cause rapid overheating and engine damage. If the gauge is misbehaving or the heater’s gone weak, it’s best to sort it before a longer trip.