2014 Ram 2500 Coolant Capacity, Type, and Service Guide

A 2014 Ram 2500 has a total cooling system capacity of approximately 28.5 to 30.6 quarts (27 to 29.1 liters), depending on the engine and equipment.

Quick Answer

• Total Capacity: 28.5 - 30.6 qt (27 - 29.1 L) for the 6.7L Cummins Turbo Diesel. The 5.7L HEMI V8 holds approximately 16.5 quarts (15.6 liters).
• OEM Coolant Spec: Mopar® 10-Year/150,000 Mile OAT (Organic Additive Technology) Coolant, meeting specification MS-12106. This coolant is typically purple.
• Mix Ratio: Use a 50/50 mixture of coolant concentrate and distilled water. Pre-mixed 50/50 solutions are recommended for correct concentration.

Capacity by Engine Option

Note: Capacities can vary slightly based on options like the cab and chassis configuration or auxiliary coolers.

Flush Interval

For the 2014 Ram 2500, the factory-fill OAT coolant has an extended service life. Always consult your owner's manual for the definitive schedule.

• Normal Duty: The recommended service interval is up to 10 years or 150,000 miles.
• Severe Duty: For vehicles used for frequent towing, hauling heavy loads, or operating in extreme temperatures, it is advisable to inspect the coolant condition annually and consider a shorter interval, such as 5 years or 100,000 miles.

How to Refill & Bleed

Properly refilling and bleeding the cooling system is critical to prevent air pockets, which can cause overheating.

1. Ensure the Engine is Cool: Never open a hot cooling system.
2. Mix Coolant: If using concentrate, mix it 50/50 with distilled water in a clean container before pouring it into the vehicle.
3. Slow Fill: Add the coolant mixture to the coolant reservoir (de-gas bottle) slowly. This allows air to escape as the system fills.
4. Check for Bleeders: While many modern systems are "self-bleeding," inspect the thermostat housing and upper radiator hose connections for any specific air bleed screws. The 2014 Ram HD trucks generally do not have manual bleeders and are designed to be filled via the pressurized reservoir.
5. Run Engine: With the reservoir cap loose or off, start the engine and turn the heater to its highest temperature and fan setting. This circulates coolant through the heater core.
6. Top Off: As the engine warms up and the thermostat opens, the coolant level will drop. Continue to top off the coolant at the reservoir until the level stabilizes.
7. Install Cap & Test Drive: Once the level is stable and you see no more bubbles, install the pressure cap. Take a short drive and let the vehicle cool down completely. Re-check the coolant level and top off if necessary.

Pro-Tip: Using a vacuum-fill tool is the most efficient and reliable method to ensure a complete, air-free fill, especially on the large-capacity diesel systems.

Common Cooling System Issues

The 2014 Ram 2500 is a robust truck, but some cooling system components can be prone to issues over time, particularly on the Cummins diesel models.

• Water Pump Failure: The water pump is a common failure point. Symptoms include a coolant leak from the front of the engine (weep hole), a whining or grinding noise, or engine overheating. The OEM pumps on the 6.7L Cummins have a known service life and are often replaced as a preventative measure during other major services.
• Radiator Leaks: Radiators, especially the connections where the plastic end tanks are crimped to the aluminum core, can develop leaks with age and thermal cycles.
• EGR Cooler Issues: The Exhaust Gas Recirculation (EGR) cooler on the 6.7L Cummins is a frequent point of failure. It can leak internally (allowing coolant into the exhaust) or externally. Symptoms of an internal leak can include unexplained coolant loss with no visible external drips and white steam from the exhaust.
• Thermostat Failure: A thermostat stuck closed will cause rapid overheating. A thermostat stuck open will result in the engine taking a very long time to reach operating temperature and poor heater performance, often triggering a check engine light.
• Hose Deterioration: With time and mileage, rubber hoses can become hard, brittle, and develop small cracks, leading to leaks, especially at connection points.

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