Parts for your 2014 Suzuki Splash-Thermostat housing

2014 Suzuki Splash thermostat housing: what it does and how to look after it

Based on technical sources—the Suzuki Splash (RB) workshop manual cooling-system section, Suzuki’s Electronic Parts Catalogue, and reputable aftermarket catalogues from brands like Tridon, Gates and Mahle for the K10B/K12B petrol and D13A diesel engines—the 2014 Suzuki Splash is fitted with a thermostat and a dedicated thermostat housing (often called the water outlet). So yes, a thermostat housing is absolutely used on the 2014 Splash.

The thermostat housing on a 2014 Suzuki Splash does more than just hold the thermostat. It forms the junction where coolant exits the cylinder head, directs flow to the radiator and heater circuit, and seals the system so pressure and temperature stay where they should. On the K10B and K12B petrol engines it’s typically a composite/plastic assembly with an O-ring–sealed thermostat and hose stubs, on the D13A diesel it’s a metal unit mounted near the alternator. Either way, its job is to help the engine warm up quickly and then keep it sitting in that sweet spot for economy, performance and low emissions.

As part of regular servicing, it’s smart for owners to give the 2014 Suzuki Splash thermostat housing a once-over under the bonnet. Look for pinkish-white coolant staining, hairline cracks around hose necks, perished O-rings, or dampness under the housing. If the gauge behaves oddly, the heater runs cold at speed, or there’s an engine code like P0128, the thermostat may be stuck and the housing could be suspect. While there’s no fixed replacement interval, preventative replacement of the thermostat (and, if plastic, the housing) around 8–10 years or 150,000–200,000 kilometres is sensible—especially if you’re already doing a water pump, radiator, or hose refresh.

When replacing, use quality parts and a new O-ring or gasket every time. Avoid gooping RTV on an O-ring joint unless the workshop manual specifically calls for it. Plastic housings don’t love over-tightening, use a torque wrench and the pattern specified in the service data. Swap the engine coolant temperature sensor across if it sits in the housing, and inspect hose clamps while you’re there.

Refill with the correct coolant—Suzuki Super Long Life (blue), or an equivalent P-OAT that meets the same spec—mixed 50/50 with demineralised water. Bleed air with the heater on hot, gently squeeze the upper hose, and run the engine until the fans cycle, topping up the reservoir as bubbles purge. A short road test and a cold recheck next morning will confirm the level is stable and the 2014 Splash’s thermostat housing is keeping temperatures bang on target.

• Quick checks: leaks, cracks, staining, loose clamps
• Replace: thermostat and O-ring, housing if brittle/warped/leaking
• Coolant: correct spec, 50/50 mix, bleed thoroughly

FAQs: 2014 Suzuki Splash thermostat housing

Where is the thermostat housing on a 2014 Suzuki Splash?

On the K10B/K12B petrol engines, the housing sits at the cylinder head’s outlet where the upper radiator hose connects—easy to spot from above once the engine cover is off. It’s a compact plastic assembly with one or more hose connections.

On the D13A diesel, look low and towards the belt side of the engine, the housing is alloy and tucked near the alternator with a short hose to the radiator. In both cases, follow the upper radiator hose back to the engine and you’ll land right on it.

Should the whole housing be replaced, or just the thermostat?

If the Splash has a composite (plastic) housing and it’s aged, cracked, or warped, replacing the complete housing assembly with the thermostat is often the most reliable fix. Plastic can fatigue over time, and a fresh assembly saves chasing small leaks later.

If the housing is metal and in good nick, replacing only the thermostat and O-ring can be fine. The deciding factors are leak evidence, brittleness, and whether the hose stubs or bolt ears look stressed.

What coolant does it take, and how much?

Use Suzuki Super Long Life Coolant (blue) or a compatible P-OAT coolant that meets the same spec, mixed 50/50 with demineralised water. This protects the alloy components in the system and plays nicely with the thermostat and seals.

Capacity varies a touch by engine and heater configuration, but owners should expect roughly 4–5 litres total. Always check the level again when cold the next day and top up the reservoir to the “F” mark if needed.