Parts for your 2010 Honda Cr-v-Thermostat

2010 Honda CR‑V Thermostat — What it does and when to replace it

The 2010 Honda CR‑V absolutely uses a thermostat. Authoritative technical references — including the Honda Service Manual for the 2007–2011 CR‑V (Cooling System section), Honda’s electronic parts catalogue, and common workshop databases such as AllData/Mitchell — specify a wax‑pellet thermostat fitted in the water outlet/thermostat housing where the lower radiator hose meets the engine. Haynes repair coverage for 2007–2012 CR‑V models also illustrates this component and its service procedure.

On this model’s 2.4‑litre i‑VTEC engine, the thermostat’s job is simple but crucial: it regulates coolant flow so the engine warms up quickly, then holds a stable operating temperature. When cold, it stays shut so the engine gets up to temp promptly — better fuel economy, smoother running, and less wear. Once warm, it opens to cycle coolant through the radiator, preventing overheating on long drives, steep hills, or in stop‑start traffic on a hot Aussie or Kiwi afternoon.

Thermostats aren’t a regular “every service” item, but they do age. Many technicians recommend replacement when doing major cooling system work, after any overheat event, or proactively around high kilometres. Always fit a quality OEM‑spec thermostat with a fresh O‑ring, and refill with Honda Type 2 (blue) premixed coolant. After installation, bleed air out: set the heater to hot, fill slowly, run the engine until the fans cycle, squeeze the upper hose to burp bubbles, top up the radiator and the reservoir, and recheck once it’s cooled.

• Common signs it’s time: engine takes ages to warm up, weak cabin heat, temp gauge wandering, overheating, cooling fans running oddly, or a P0128 code (coolant temp below regulating range).
• Location: in the thermostat housing at the lower radiator hose connection on the engine — easy to reach with basic hand tools.
• Good practice: replace the housing gasket/O‑ring, clean mating surfaces, and tighten housing bolts to the factory spec (don’t overdo it).

Looked after properly, the thermostat helps the 2010 CR‑V run spot‑on — efficient, reliable, and ready for the long haul.

Popular questions about the 2010 Honda CR‑V thermostat

What temperature does the 2010 CR‑V thermostat open?
Honda specifies an operating range where the thermostat begins to open around the high‑70s to low‑80s °C and is fully open near the mid‑90s °C. Exact figures vary by part revision, so checking the service manual or OEM part spec is the safe bet.

How can someone tell if the thermostat is stuck open or stuck closed?
Stuck open: slow warm‑up, cool heater air, and a P0128 fault are typical. Stuck closed: rapid overheating, hard upper hose, and possible coolant boil‑over. If overheating occurs, switch off promptly to avoid engine damage.

Is it okay to keep driving with a dodgy thermostat?
Not recommended. Stuck open hurts economy and can load up the engine with extra wear, stuck closed risks serious overheating. It’s a relatively quick, affordable fix that prevents bigger headaches.