Parts for your 2006 Honda Cr-v-Thermostat housing

2006 Honda CR‑V Thermostat Housing: What It Does and How to Look After It

Yes, the 2006 Honda CR‑V absolutely uses a thermostat housing. Technical sources including the Honda CR‑V 2002–2006 Service Manual (Cooling System section), Honda’s Electronic Parts Catalogue (often listing the part as “water outlet” or “thermostat cover”), and OEM/aftermarket catalogues that supply the housing seal/O‑ring all confirm a bolt‑on thermostat housing on the K24A1 engine used in this model year.

On this CR‑V, the thermostat housing bolts to the engine and holds the thermostat in place, directs coolant flow to the radiator, and provides mounting for the engine coolant temperature (ECT) sensor. Its job is to help the engine warm up quickly, then regulate temperature under all driving conditions. If the housing or its seal fails, coolant leaks or air ingress can cause overheating, slow cabin heat, or erratic temperature readings.

As part of servicing, it’s smart to inspect the housing, hose connections, and the O‑ring for seepage, staining, or crusty residue. Any hairline cracks, corrosion, or perished seals mean it’s time for replacement. When replacing the thermostat or housing:

• Use the correct thermostat and new O‑ring/seal specified for the K‑series CR‑V.
• Clean the mating surfaces carefully, don’t gouge the alloy.
• Fit hoses fully and secure with quality clamps, position them to avoid chafing.
• Tighten housing bolts evenly to the torque specified in the Honda manual.
• Refill with Honda Type 2 blue coolant (premix) and bleed air from the system with the heater on HOT and the radiator cap off (use a spill‑free funnel if handy). Top up the overflow bottle to the MAX line under the bonnet once cooled.

The thermostat itself isn’t a set‑interval item, but many technicians replace it preventatively around high kilometre marks or whenever there are temperature control issues. Signs that point to attention include coolant smell, visible leaks at the housing, slow warm‑up, temp gauge wandering, or overheating at idle.

Quality matters here: an OEM‑grade housing, fresh O‑ring, and the right coolant save headaches. With the correct parts and a careful bleed, the 2006 CR‑V’s cooling system stays stable, the cabin heater works sweet as, and the engine lives a long, happy life.

Popular questions about the 2006 Honda CR‑V thermostat housing

Where is the thermostat housing on a 2006 CR‑V?
It’s mounted low on the engine, near the lower radiator hose connection on the K24A1. Follow the lower hose back to the engine and you’ll land on the housing. It also carries the coolant temperature sensor, so you’ll see an electrical plug nearby.

What coolant should be used after replacing the housing or thermostat?
Use Honda Type 2 blue premixed coolant. It’s silicate‑free and designed for Honda alloys and seals. After refilling, run the engine with the heater on HOT to purge air, top up as the level drops, and recheck the overflow bottle once it cools.

Do I need sealant on the housing?
No sealant is normally required. The CR‑V uses a dedicated thermostat O‑ring/seal. Replace the O‑ring, lightly lubricate it with clean coolant for ease of assembly, and ensure the groove and mating faces are clean before refitting.