Parts for your 2017 Haval H6-Thermostat

2017 Haval H6 Thermostat — What It Does and When to Replace It

Referencing technical sources including the Haval H6 workshop manual (Cooling System section for 2015–2018 models) and Great Wall Motors’ electronic parts catalogue, the 2017 Haval H6 is fitted with a conventional wax‑pellet thermostat. It’s integrated into the water outlet (thermostat housing) on the cylinder head, used across the common 1.5‑litre turbo and 2.0‑litre turbo petrol engines. So yes, a thermostat is absolutely relevant on this model and it plays a key role in engine temperature control and efficiency.

The thermostat’s job is simple but vital: it helps the engine warm up quickly and then keeps it in the sweet spot for performance, economy, and longevity. Cold starts see the thermostat closed, circulating coolant within the engine so it warms faster. Once operating temperature is reached, the thermostat opens to let coolant flow through the radiator, shedding heat. That balance means better fuel use, stable heater performance, and happy engine oil and emissions gear.

For the 2017 Haval H6, the thermostat isn’t a routine replacement item on a time basis, but it should be inspected whenever coolant is serviced and definitely changed if it shows signs of sticking or leakage. Typical clues include slow warm‑up, the temperature gauge swinging about, the radiator fan running constantly, weak cabin heat on the open road, overheating under load, or dried coolant staining around the housing. Because the thermostat rating and flow characteristics are calibrated for these engines, it’s best to use a quality OEM‑spec part with the correct opening temperature stamped on the unit.

When replacing, plan on fresh coolant that meets the manufacturer’s spec, a new housing seal or O‑ring, and a proper bleed to clear air from the system. The housing on many H6 variants is a composite unit—so don’t overtighten the fasteners. With the engine stone cold, drain enough coolant to sit below the housing, swap the thermostat and seal, torque evenly, refill, bleed, and check for leaks. Expect around 1–2 hours for a tidy job. It’s also smart to inspect the upper radiator hose and confirm the coolant temperature sensor connection at the housing is clean and secure. Regular visual checks under the bonnet and sticking to the coolant change interval go a long way to keeping the thermostat—and the whole cooling system—reliable across Aussie and Kiwi conditions.

• Use manufacturer‑approved coolant, don’t mix types.
• Replace the housing seal/O‑ring whenever the thermostat is removed.
• Bleed the system thoroughly and verify heater performance and stable gauge readings on the test drive.

Where is the thermostat on a 2017 Haval H6?

It sits in the water outlet (thermostat housing) on the cylinder head, where the upper radiator hose connects. That spot makes it easy to recognise: follow the top hose back to the engine and you’ll find the housing and sensor.

What temperature does the H6 thermostat open at?

The exact rating depends on engine and calibration, but it’s typically in the high‑80s to low‑90s °C range. The correct value is usually stamped on the thermostat and listed in the parts data—use that spec when ordering.

Is it safe to drive with a stuck thermostat?

Not recommended. Stuck closed can cause rapid overheating and engine damage. Stuck open can lead to over‑cooling, higher fuel use, weak cabin heat, and extra engine wear. If in doubt, replace it and bleed the cooling system properly.