2023 Ram 1500 Coolant Capacity & Type

The 2023 Ram 1500 typically holds between 14.2 and 16.5 quarts (13.4 to 15.6 liters) of coolant, depending on the engine. Properly maintaining your truck's cooling system is vital for its longevity and performance, especially for a heavy-duty vehicle like the Ram 1500.

Quick Answer

• Total Cooling System Capacity: 14.2 – 16.5 quarts (13.4 – 15.6 liters)
• OEM Coolant Specification: Mopar Antifreeze/Engine Coolant 10 Year/150,000 Mile Formula OAT (Organic Additive Technology). It is typically dyed purple.
• Mix Ratio: 50/50 pre-mixed solution (do not add plain water)

Capacity by Engine Option

The cooling system capacity for the 2023 Ram 1500 varies slightly based on the engine configuration:

• 3.6L Pentastar V6 (with eTorque): Approximately 14.2 quarts (13.4 liters)
• 5.7L HEMI V8 (with or without eTorque): Approximately 16.5 quarts (15.6 liters)
• 3.0L EcoDiesel V6: Approximately 14.5 quarts (13.7 liters)

Always consult your owner's manual for the most precise capacity figures for your specific trim and engine.

Flush Interval

Maintaining the correct coolant flush interval is crucial for preventing corrosion, cavitation, and other cooling system problems. The manufacturer-recommended intervals for the 2023 Ram 1500 using Mopar OAT coolant are:

• Normal Duty: Replace every 10 years or 150,000 miles, whichever comes first.
• Severe Duty (e.g., heavy towing, extreme temperatures, off-road use): While not explicitly shortened by Ram for OAT coolant, it's always wise to inspect your coolant condition annually and consider a professional system flush sooner if the fluid appears dirty, discolored, or if you frequently operate under severe conditions.

How to Refill & Bleed

Refilling and bleeding the cooling system properly is essential to avoid air pockets, which can lead to overheating. Here's a general procedure for the 2023 Ram 1500:

1. Safety First: Ensure the engine is completely cool before starting. Wear appropriate safety gear, such as gloves and eye protection.
2. Drain (if flushing): If you are performing a full flush, open the radiator petcock (drain valve) and remove the radiator cap to allow the system to drain. Some models may have an engine block drain plug as well; consult your service manual.
3. Close Drain & Fill: Once drained, close the petcock. Slowly fill the coolant reservoir with the specified Mopar OAT 50/50 prediluted coolant to the "FULL" mark. Do not overfill.
4. Bleeding Procedure:
   • Start the engine with the heater set to full hot and the fan on low. This opens the heater core bypass valve, allowing coolant to circulate through the entire system.
   • Allow the engine to reach operating temperature. As the thermostat opens, the coolant level in the reservoir may drop. Add more coolant as needed to maintain the "FULL" level.
   • Some Ram 1500 engines, especially the Pentastar V6, may have a bleed screw or valve on the thermostat housing or near the upper radiator hose. If present, slowly open this screw until a steady stream of coolant (without air bubbles) emerges, then close it.
   • Continuously monitor the temperature gauge for any signs of overheating.
   • Squeeze the upper and lower radiator hoses several times to help dislodge trapped air.
   • Once the engine is stable at operating temperature and no more air bubbles appear in the reservoir, drive the vehicle for a short period. Re-check the coolant level once the engine cools down completely and top off as necessary.
   • For the most thorough bleed, especially after major component replacement, a vacuum-fill tool is highly recommended.

Common Cooling System Issues

While the 2023 Ram 1500 is a robust vehicle, certain cooling system issues can arise:

• Water Pump Leaks: Water pump failures, often indicated by a grinding noise or coolant seeping from the weep hole, are not uncommon on various Ram engines, particularly with higher mileage.
• Thermostat Failures: A stuck-open thermostat can lead to the engine running too cool, reducing efficiency, while a stuck-closed thermostat will cause rapid overheating.
• Radiator Leaks: Road debris or age can lead to perforations in the radiator, causing coolant loss. Check for tell-tale pink/purple coolant stains.
• Hose Leaks: Hoses can degrade over time, leading to cracks and leaks, especially at connection points. Inspect hoses for sponginess, hardness, or swelling.
• Coolant Expansion Tank Leaks: The plastic expansion tank can develop cracks, particularly around seams or hose connections, leading to slow coolant loss.
• EGR Cooler Leaks (EcoDiesel): For EcoDiesel models, the EGR (Exhaust Gas Recirculation) cooler can sometimes develop internal leaks, leading to coolant consumption or white smoke from the exhaust.

Regular inspection of your coolant level, condition, and visual checks for leaks can help prevent minor issues from becoming major problems.

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