How Much Coolant Does a 2025 Ram 1500 Hold?

Your 2025 Ram 1500 typically holds between 14.0 to 16.0 quarts (13.2 to 15.1 liters) of coolant, depending on the engine and specific configuration.

Quick Answer

• Total Cooling System Capacity: 14.0 - 16.0 quarts (13.2 - 15.1 liters)
• OEM Coolant Spec: Mopar OAT MS-12106 (Orange/Pink/Purple-ish, Organic Acid Technology)
• Mix Ratio: 50/50 Pre-mix or 50/50 concentrate with distilled water

Capacity by Engine Option

The coolant capacity in your 2025 Ram 1500 can vary slightly based on the engine:

Always consult your owner's manual for the most precise capacity figure for your specific vehicle configuration.

Flush Interval

Maintaining the correct coolant and adhering to flush intervals is crucial for your Ram 1500's engine longevity.

• Normal Duty: The manufacturer generally recommends a coolant flush and refill every 10 years or 150,000 miles, whichever comes first.
• Severe Duty: If your driving conditions involve frequent towing, heavy payloads, extreme temperatures, or off-road use, it's wise to consider flushing the coolant more frequently, possibly every 5 years or 75,000 miles.

How to Refill & Bleed

Properly refilling and bleeding the cooling system is vital to prevent air pockets that can cause overheating. While general steps are provided, always refer to your service manual for detailed, vehicle-specific instructions.

1. Safety First: Ensure the engine is completely cool before attempting any work on the cooling system. Wear appropriate personal protective equipment, including gloves and eye protection.
2. Drain Old Coolant: Place a drain pan under the radiator drain petcock (or lower radiator hose if no petcock is present). Open the petcock or disconnect the hose to drain the system. Allow ample time for it to drain fully.
3. Flush (Optional but Recommended): If performing a full flush, close the drain and fill with distilled water. Run the engine with the heater on high until operating temperature is reached, then drain again. Repeat until the drained water runs clear.
4. Refill: Close the drain. Slowly fill the cooling system through the radiator or expansion tank with the specified Mopar OAT MS-12106 coolant (50/50 mix with distilled water). Filling slowly helps prevent air pockets.
5. Bleed Air:
   • Start the engine with the heater on high (fan speed low). Leave the radiator cap (or expansion tank cap) off.
   • Allow the engine to reach operating temperature. You may see air bubbles escape from the fill neck.
   • Maintain the coolant level by adding more as needed. Squeeze the upper and lower radiator hoses sometimes to help dislodge air bubbles.
   • Some Ram 1500 models may have a small bleed screw, typically located near the thermostat housing or on a heater hose, that can be loosened slightly to vent air.
   • After the thermostat opens (you'll feel the lower radiator hose get warm), air should stop coming out. Install the cap.
6. Monitor: After your first drive, allow the engine to cool down and recheck the coolant level in the expansion tank. Top off as necessary.

Common Cooling System Issues

While the 2025 Ram 1500 is a modern vehicle, some general cooling system issues can occur across Ram 1500 generations that are worth noting:

• Coolant Leaks: Hoses, radiator, water pump, and heater core connections can develop leaks over time. Regular inspection is advised.
• Thermostat Failure: A failing thermostat can cause the engine to overheat (stuck closed) or run too cool (stuck open).
• Water Pump Failure: Symptoms include leaks, a whining noise, or overheating.
• Radiator Issues: Clogs from debris or internal corrosion can reduce cooling efficiency. External damage from road debris is also possible.
• Electric Cooling Fan Problems: A malfunctioning fan can lead to overheating, especially in stop-and-go traffic or at idle.
• Improper Coolant Type: Using the wrong coolant type (e.g., IAT or HOAT instead of OAT) can lead to corrosion, clogs, and costly damage to the cooling system and engine components.

Always use the specified Mopar OAT MS-12106 coolant for your 2025 Ram 1500 to ensure proper protection and prevent premature component failure.

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