Parts for your 2017 Suzuki Splash-Thermostat

2017 Suzuki Splash thermostat — what it does and how to look after it

Based on technical sources, a thermostat is absolutely fitted and relevant to the 2017 Suzuki Splash (also sold as the Maruti Ritz in some markets). The Suzuki Splash/Ritz Workshop Manual for K10B and K12B petrol engines, the Maruti Suzuki Ritz service information for the cooling system, and Suzuki’s Electronic Parts Catalogue for the Splash list a wax‑pellet thermostat located in the water outlet housing, with a specified opening range around the low‑to‑mid 80s °C. That means the 2017 Splash uses a conventional engine coolant thermostat.

The thermostat’s job is simple but crucial: help the K‑series engine warm up quickly, then hold it in its happy temperature window. It stays closed after a cold start so the coolant circulates within the block, bringing temps up faster for smoother running, better fuel economy, and a toasty heater under the bonnet. Once the coolant hits its set point (typically starting to open around 82–88 °C and fully open in the mid‑90s), it meters flow to the radiator to stop overheating on long climbs or in Aussie and Kiwi summer traffic.

During regular servicing of a 2017 Splash, the thermostat doesn’t usually need scheduled replacement, but it should be checked whenever the cooling system is serviced or coolant is renewed. Tell‑tale signs it’s time to replace include slow warm‑up, the gauge sitting low on the motorway, weak cabin heat (stuck open), or creeping temps and boiling over (stuck closed). Any coolant contamination, corrosion in the housing, or crusty seals are also good reasons to fit a new unit.

When replacing, use an OEM‑quality thermostat matched to the engine code, along with a fresh O‑ring or gasket. Top up with the correct long‑life coolant (premixed to the right ratio), and bleed the system so there’s no trapped air. It’s smart to inspect the radiator cap, hoses, and water pump at the same time—small money for big peace of mind. After the job, let the engine reach operating temperature, confirm the radiator fan cycles, and check for leaks. A basic tool kit will do the trick, but sticking to the torque specs and procedures in the workshop manual avoids cracked housings or weeps later on.

• Replace proactively if the car is 8–10 years old or over 150,000 km, or whenever the cooling system has been overheated.
• Use fresh coolant and a new seal every time the thermostat is disturbed.
• If unsure, a quick infrared thermometer check across the hoses can spot a lazy thermostat.

Popular questions about the 2017 Suzuki Splash thermostat

What temperature should the 2017 Splash thermostat open at?

For K10B/K12B petrol engines, workshop data specifies a start‑to‑open range around 82–88 °C, with full opening in the mid‑90s. If the dash gauge never reaches normal, or swings around, the thermostat could be out of spec—even if the car still drives fine.

How can someone tell if their Splash thermostat is stuck?

Stuck open: very slow warm‑up, lukewarm heater, and the gauge sitting low on open roads. Stuck closed: overheating, hard upper radiator hose, possible coolant boil‑over. A quick feel test—cold upper hose after several minutes may be normal, but it should warm progressively as the gauge rises. An infrared thermometer across the housing and hoses makes diagnosis easier.

Should the thermostat be changed as routine maintenance?

It’s generally a replace‑on‑condition item rather than strictly time‑based. That said, many techs recommend fitting a new thermostat and seal during a major cooling system service, after an overheat event, or around the 8–10 year mark to keep the Splash reliable in Aussie and NZ climates.