2020 Nissan Frontier: Coolant Capacity & Type

The 2020 Nissan Frontier with the 3.8L V6 engine holds approximately 11.1 quarts (10.5 liters) of coolant.

Quick Answer

• Total Cooling System Capacity: 11.1 quarts (10.5 liters)
• OEM Coolant Specification: Nissan Blue Long Life Antifreeze/Coolant (LLC), Part #999MP-L25500P. This is a blue-colored, phosphate-enhanced organic acid technology (P-OAT) coolant.
• Mix Ratio: Use a 50/50 mixture of genuine Nissan Blue LLC and distilled or deionized water. Pre-mixed versions are available and recommended for convenience and accuracy.

Capacity by Engine Option

For the 2020 model year, the Nissan Frontier was equipped with a single engine option, the 3.8L V6. This streamlined the specifications compared to previous years which featured multiple engine choices.

Flush Interval

Following the factory-recommended service intervals is crucial for maintaining the health of your cooling system. Using the correct Nissan Blue LLC extends the service life significantly compared to older coolant types.

• Initial Factory Fill: The first coolant flush is recommended at 105,000 miles or 7 years, whichever comes first.
• Subsequent Flushes: After the initial service, subsequent coolant changes should be performed every 75,000 miles or 5 years.
• Severe Duty: If you operate your Frontier under severe conditions—such as frequent towing, heavy loads, extensive idling, or driving in extreme hot or cold climates—it is wise to consider a more conservative flush interval, such as every 60,000 miles.

How to Refill & Bleed

Properly refilling and bleeding the air from the cooling system is critical to prevent overheating. The 3.8L V6 in the Frontier is generally straightforward, but air pockets can be stubborn.

1. Ensure the Engine is Cool: Never open a hot cooling system. Wait several hours until the engine is completely cool to the touch.
2. Mix Coolant: If using concentrate, mix it 50/50 with distilled water in a clean container before pouring.
3. Fill Slowly: Remove the radiator cap and slowly pour the new coolant into the radiator. Fill the coolant reservoir tank to the "MAX" line as well.
4. Bleed the System: While there isn't a specific, easily accessible bleeder screw like on some other vehicles, the most effective method is to use a spill-free funnel kit. Attach the funnel to the radiator neck, fill it about halfway, and then start the engine. Let it run with the heater on high. You will see air bubbles coming up into the funnel. Continue to run the engine until the thermostat opens (you'll see the coolant level in the funnel drop) and the bubbles stop. This process ensures all air is purged.
5. Top Off: Once the engine cools back down, the coolant level in the radiator and reservoir will drop. Top off both to their respective full marks.

Pro Tip: Using a vacuum-fill tool is the fastest and most effective professional method to eliminate air pockets during a refill.

Common Cooling System Issues

The 2020 Frontier is part of a generation known for its reliability. However, some common issues seen on this platform over the years include:

• Radiator Leaks: Over time, the plastic end tanks on the radiator can develop cracks or the seals can fail, leading to leaks. Check for drips of blue coolant under the front of the truck.
• Water Pump Failure: While not rampant, water pump failure is a possibility on any vehicle. Symptoms include a coolant leak from the front of the engine, a whining or grinding noise, and engine overheating.
• Thermostat Issues: A thermostat stuck closed will cause rapid overheating, while one stuck open will result in the engine never reaching full operating temperature and poor heater performance.

Regularly inspecting hoses for cracks or swelling and checking coolant levels can help you catch these problems early.

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