Parts for your 2013 Honda Elysion-Thermostat

2013 Honda Elysion Thermostat — what it does and how to look after it

Yes, the 2013 Honda Elysion uses a conventional engine thermostat. Technical documentation backs this up: the Honda Elysion Service Manual (Cooling System section) specifies a wax‑pellet thermostat in the cooling circuit, and the Honda Electronic Parts Catalogue (EPC) for RR1–RR6 Elysion/Elysion Prestige lists a thermostat assembly for both the 2.4‑litre K‑series four‑cylinder and the J‑series V6 engines. As a liquid‑cooled petrol engine, the Elysion relies on a thermostat to manage coolant flow and stabilise operating temperature.

The thermostat’s job is simple but critical: it helps the engine warm up quickly, then holds it around its designed operating range (typically opening around the high‑70s to low‑80s °C and fully open in the high‑80s to low‑90s °C). That steady temperature keeps fuel economy tidy, emissions low, cabin heater performance strong, and engine wear down.

As part of regular servicing on a 2013 Elysion, it’s smart to inspect the thermostat whenever the coolant is changed. On older vehicles, many workshops in Australia and New Zealand treat the thermostat as preventative maintenance around 8–10 years or 120,000–160,000 km, especially if there’s any history of cooling system issues. Always refill with the correct Honda long‑life coolant (often the blue Type 2 premix) and bleed the system properly to avoid air pockets.

Common signs the thermostat needs attention include:

• Slow warm‑up or the temp gauge sitting unusually low (may be stuck open).
• Overheating at speed or after a hot soak (may be stuck closed or partially opening).
• Heater going cold at idle but warm when revved, or fluctuating temperature readings.
• Cooling fans running excessively and poor fuel consumption.

Replacement on the Elysion is straightforward for a trained tech: drain enough coolant, remove the lower hose housing/water outlet where the thermostat sits, replace the thermostat and O‑ring, torque the housing to the service‑manual spec, refill, and bleed. Location varies slightly by engine: on the K‑series 2.4 it’s at the water outlet near the lower radiator hose connection, on the J‑series V6 it’s mounted at the housing on the front side of the engine by the lower hose. Using a genuine‑spec thermostat and seal is worth it for correct opening temperature and reliability.

If the vehicle has any cooling‑system contamination, oil in coolant, or repeated overheating, the thermostat should be replaced as a matter of course while the root cause is sorted. A fresh radiator cap and a thorough check of hoses and the water pump are good practice at the same time.

Popular questions

Where is the thermostat on a 2013 Honda Elysion?
It sits inside the thermostat housing at the end of the lower radiator hose. On the 2.4‑litre K‑series it’s at the water outlet beneath/near the intake side of the engine. On the J‑series V6 it’s mounted on the front of the engine where the lower hose meets the housing. Access and exact fasteners are detailed in the Honda Elysion Service Manual.

What temperature rating should the thermostat be?
Honda specifies a thermostat that begins to open roughly in the high‑70s to low‑80s °C and is fully open by the high‑80s to low‑90s °C. Using a genuine‑spec unit ensures the ECU sees the expected warm‑up and operating temps, keeping fuel economy and drivability on point.

When should it be replaced?
Replace immediately if there are overheating, slow warm‑up, or fluctuating temperature issues. As preventative maintenance on a 2013 vehicle, many owners opt to replace the thermostat during a major cooling service around 8–10 years or 120,000–160,000 km, along with fresh Honda long‑life coolant and a new cap.