Parts for your 2018 Honda Odyssey-Thermostat housing

2018 Honda Odyssey Thermostat Housing — Purpose, care, and when to swap it out

Based on technical references including the Honda Odyssey (2018, J35Y6) Service Manual cooling system procedures, Honda parts catalogues listing the Water Inlet/Thermostat Housing, and professional databases such as ALLDATA/Mitchell 1, the 2018 Honda Odyssey is fitted with a thermostat and a dedicated thermostat housing. It’s absolutely relevant to cooling system service on this model.

On the 2018 Odyssey, the thermostat housing is the gateway for coolant flow out of the engine and into the radiator. It holds the thermostat in the correct orientation, seals it against the block with an O‑ring or gasket, and provides hose and sensor ports. When cold, the thermostat stays shut so the V6 warms up quickly