2017 Honda Odyssey Coolant Capacity & Type

The 2017 Honda Odyssey's cooling system holds approximately 7.3 quarts (6.9 liters) of coolant. It is crucial to use the correct type of coolant for optimal performance and longevity of your cooling system.

Quick Answer

• Total Cooling System Capacity: Approximately 7.3 quarts (6.9 liters)
• OEM Coolant Specification: Honda Long-Life Antifreeze/Coolant Type 2 (Blue, P-OAT hybrid silicate-free or similar, specifically designed for Honda/Acura vehicles, often referred to as Honda Type 2 Coolant). Do NOT use conventional silicate coolants.
• Mix Ratio: Pre-mixed 50/50 with deionized water.

Capacity by Engine Option

The 2017 Honda Odyssey was offered with a single-engine option in North America, the 3.5L V6 (J35Y6). Therefore, the coolant capacity remains consistent across all trims for this model year.

Flush Interval

Honda recommends specific maintenance intervals for their Type 2 coolant due to its long-life properties:

• Normal Duty: The initial coolant flush is typically recommended at 10 years or 120,000 miles, whichever comes first. After the initial flush, subsequent flushes are recommended every 5 years or 60,000 miles.
• Severe Duty (e.g., extremely hot climates, heavy towing, frequent short trips): While Honda's Type 2 coolant is robust, consider a slightly shorter interval, such as 7 years or 90,000 miles for the initial flush, and every 3-4 years or 45,000 miles thereafter, if you frequently operate under severe conditions. Always refer to your owner's manual for the most accurate and up-to-date information.

How to Refill & Bleed

Properly refilling and bleeding the cooling system is critical to prevent air pockets, which can lead to overheating. Always perform this procedure on a cool engine.

1. Drain: With the engine cool, place a drain pan under the radiator. Open the radiator drain plug (usually on the bottom of the radiator). Some models may also have an engine block drain plug.
2. Flush (Optional but Recommended): Once drained, close the drain plug and fill with distilled water. Run the engine with the heater on until it reaches operating temperature. Drain again. Repeat until the drained water is clear. This removes old coolant and contaminants.
3. Refill: Close the drain plugs. Slowly fill the radiator with Honda Type 2 coolant (pre-mixed 50/50). Fill the reservoir to the MAX line.
4. Bleed Air:
   • Start the engine with the radiator cap off (or a spill-free funnel attached). Set the heater to its maximum heat setting and fan speed (this opens the heater core valve to allow coolant flow).
   • Let the engine run until it reaches operating temperature and the cooling fans cycle on and off at least twice. This helps to circulate the coolant and expel air.
   • Gently squeeze the upper and lower radiator hoses a few times to help dislodge air bubbles.
   • Keep an eye on the coolant level in the radiator and top it off as needed. You should see small bubbles escaping.
   • Some Honda vehicles have an air bleed bolt located near the thermostat housing or on a heater hose; if present, open this bolt slightly until a steady stream of coolant emerges, then close it.
   • Once no more bubbles appear and the level is stable, install the radiator cap.
5. Final Check: Drive the vehicle and monitor the temperature gauge. After the engine cools down, recheck the coolant level in the reservoir and top off if necessary.

Common Cooling System Issues for this Generation (2011-2017 Honda Odyssey)

While generally reliable, the 5th generation Honda Odyssey (including the 2017 model) can experience some cooling system-related issues:

• Radiator Leaks: Over time, the plastic end tanks of the radiator can become brittle and crack, leading to coolant leaks. Visible pink or blue crusty residue around the radiator is a tell-tale sign.
• Water Pump Failure: The water pump, often driven by the timing belt, can develop leaks or internal bearing failures. A noticeable whine from the engine or coolant leaking from the weep hole on the water pump are indicators.
• Thermostat Issues: A faulty thermostat can cause the engine to overheat (if stuck closed) or run cooler than optimal (if stuck open). Erratic temperature gauge readings are common with this issue.
• Coolant Reservoir Leaks or Cracks: The plastic reservoir can sometimes develop cracks, leading to slow coolant loss. Visually inspect the reservoir for hairline cracks or discoloration.
• Heater Core Clogging/Failure: Though less common, a clogged heater core can result in a lack of heat inside the cabin. This can sometimes be exacerbated by using incorrect coolant types which cause sediment buildup.
• Cooling Fan Motor Issues: The electric cooling fans are critical for dissipating heat, especially in stop-and-go traffic. A failed fan motor or relay can lead to overheating at low speeds or when idling. Pay attention to whether both fans are operating when the engine is hot.

Regular maintenance and using the specified Honda Type 2 coolant will significantly reduce the likelihood of these issues. Find a trusted shop on Repairius.