2021 Jeep Grand Cherokee Coolant Capacity & Type

The 2021 Jeep Grand Cherokee holds approximately 14.2 to 14.5 quarts (13.4 to 13.7 liters) of coolant in its cooling system, depending on the engine. It's crucial to use the correct Mopar OAT (Organic Additive Technology) antifreeze/coolant, specifically meeting Chrysler material standard MS-12106.

Quick Answer

• Total Cooling System Capacity: 14.2 - 14.5 quarts (13.4 - 13.7 liters)
• OEM Coolant Specification: Mopar OAT (Organic Additive Technology) Antifreeze/Coolant, Pink/Purple in color, meeting Chrysler MS-12106.
• Mix Ratio: 50/50 pre-mixed coolant, or 50% coolant concentrate with 50% distilled water.

Capacity by Engine Option

Note: These capacities are approximate and can vary slightly based on specific vehicle options and cooling system configurations.

Flush Interval

Maintaining your Grand Cherokee's cooling system is vital for its longevity. The recommended coolant flush intervals are:

• Normal Duty: Every 10 years or 150,000 miles, whichever comes first.
• Severe Duty: If you frequently tow, drive in extreme temperatures, or operate in dusty conditions, it may be beneficial to inspect the coolant more frequently and consider replacing it sooner, typically around 5 years or 75,000 miles.

Always refer to your owner's manual for the most accurate and up-to-date maintenance schedules.

How to Refill & Bleed

Refilling and bleeding the cooling system on a 2021 Jeep Grand Cherokee requires careful attention to ensure all air is removed, which is critical for proper cooling system operation.

1. Drain the System: With the engine cool, open the drain cock on the bottom of the radiator and remove the radiator cap to allow the system to drain completely. Some engines may also have block drains. Dispose of old coolant responsibly.
2. Close Drain and Refill: Close the radiator drain cock. Begin filling the system slowly through the coolant reservoir with the correct 50/50 mix of Mopar MS-12106 OAT coolant. Filling slowly helps prevent air pockets.
3. Engine Start and Bleed: Leave the radiator cap off (or reservoir cap, depending on system design). Start the engine and let it run with the heater on full blast (hot) and the fan on low. This opens the heater core and helps circulate coolant.
4. Monitor Level and Squeeze Hoses: As the engine warms up, the thermostat will open, and the coolant level in the reservoir may drop. Add more coolant as needed. Gently squeeze the upper and lower radiator hoses to help dislodge any trapped air bubbles. Watch for air bubbles coming out of the reservoir.
5. Bleed Screws (if applicable): Some Grand Cherokee engines might have small bleeder screws on the thermostat housing or other high points of the cooling system. If present, carefully open these until a steady stream of coolant (without air bubbles) emerges, then close them.
6. Cool-Down Cycle: Once the engine reaches operating temperature and no more air bubbles appear, install the reservoir cap. Allow the vehicle to cool completely.
7. Final Check: Once cool, recheck the coolant level in the reservoir and top off if necessary. Monitor the coolant level over the next few driving cycles.

Note: A vacuum-fill tool is highly recommended for a complete and air-free fill, especially after a full drain, as modern cooling systems can be challenging to bleed manually.

Common Cooling System Issues

While generally reliable, 2021 Jeep Grand Cherokees, like most vehicles, can experience cooling system issues over time or due to specific design considerations for their generation:

• Water Pump Leaks: The water pump is a common point of failure. Keep an eye out for pink/purple stains or drips under the front of the vehicle.
• Radiator Leaks: Radiators can develop leaks, often due to road debris impact, corrosion, or age. Small pinhole leaks might only be noticeable when the system is hot and under pressure.
• Heater Core Issues: A clogged or leaking heater core can lead to a lack of cabin heat or a sweet smell inside the vehicle, sometimes accompanied by a foggy windshield.
• Thermostat Failures: A stuck-open thermostat can cause the engine to run too cool, decreasing fuel efficiency, while a stuck-closed thermostat can lead to overheating.
• Coolant Expansion Tank Leaks: The plastic coolant reservoir can crack over time, leading to external coolant leaks. Check for cracks or discoloration on the tank.
• Hose Leaks: Hoses degrade over time due to heat and pressure. Inspect them for cracks, bulges, or softness, especially where they connect to components.

Regular inspections and adherence to the recommended maintenance schedule can help prevent minor issues from escalating into major repairs.

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