2020 International MV — Coolant Capacity & Type

The 2020 International MV holds between 32 and 36 quarts (30.3 to 34.1 liters) of coolant, depending on the specific engine and cooling system configuration.

Quick Answer

• Total Cooling System Capacity: 32-36 quarts (30.3-34.1 liters)
• OEM Coolant Spec: Check your owner's manual or consult an International dealer. Typically, this vehicle calls for a red/pink, OAT (Organic Acid Technology) or HOAT (Hybrid Organic Acid Technology) coolant meeting Cummins CES 14603 or CES 14470, or Navistar MPAPS B-1 Type II specifications.
• Mix Ratio: 50/50 prediluted coolant or 50% coolant concentrate mixed with 50% distilled water.

Capacity by Engine Option

The International MV series often comes with various engine options, primarily from Cummins. The coolant capacity can vary slightly based on the engine and radiator size.

Always verify the exact capacity for your specific VIN with your owner's manual or an International service manual.

Flush Interval

Regular coolant maintenance is crucial for the longevity of your 2020 International MV's cooling system.

• Normal Duty: Typically, a coolant flush is recommended every 3 years or 100,000 miles, whichever comes first.
• Severe Duty: For vehicles operating under severe conditions (e.g., heavy hauling, frequent idling, extreme temperatures), it's advisable to shorten the interval to every 2 years or 75,000 miles.

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

How to Refill & Bleed

Properly refilling and bleeding the cooling system is vital to prevent air pockets, which can lead to overheating. For the 2020 International MV, follow these general steps:

1. Drain: With the engine cool, place a drain pan under the radiator. Open the radiator drain petcock and remove the radiator cap to accelerate draining. Some engines may also have block drains.
2. Flush (Optional but Recommended): Once drained, close the petcock and refill the system with distilled water. Run the engine with the heater on until it reaches operating temperature. Drain again. Repeat until the drained water is clear. You can also use a reputable cooling system flush product according to its directions.
3. Refill: Close all drain points. Slowly add the specified 50/50 coolant mixture to the surge tank/reservoir. Fill until it reaches the 'COLD FILL' mark.
4. Bleed Air:
   • Start the engine and run it with the heater on high. Keep the radiator cap off (or surge tank cap loose) initially.
   • Monitor the coolant level in the surge tank and add more as needed. You should see air bubbles escaping.
   • Squeeze the upper and lower radiator hoses periodically to help dislodge air pockets.
   • Some International MV trucks may have a bleed screw or valve located on the thermostat housing or upper radiator hose. If present, open this slightly until a steady stream of coolant (without air bubbles) emerges, then close it.
   • Continue running the engine until it reaches normal operating temperature and the thermostat opens (you'll feel the lower radiator hose get warm).
   • Shut off the engine and allow it to cool completely. Recheck the coolant level in the surge tank and top off if necessary.
5. Final Check: After a few drive cycles, recheck the coolant level when the engine is cold and top off if needed. Keep an eye on the temperature gauge for any signs of overheating.

Consider using a vacuum fill tool for the most efficient and thorough air removal, especially in commercial vehicle applications.

Common Cooling System Issues for this Generation

The 2020 International MV, like many heavy-duty trucks, can experience specific cooling system issues. Awareness can help with early detection:

• EGR Cooler Leaks: The Exhaust Gas Recirculation (EGR) cooler is a common failure point in modern diesel engines. Leaks can introduce exhaust gases into the cooling system, leading to overheating, loss of coolant, and accelerated coolant degradation.
• Water Pump Failure: Large diesel engines put significant stress on water pumps. Bearing failure, seal leaks, or impeller erosion can lead to insufficient coolant circulation and overheating.
• Radiator Clogging/Leaks: External debris can clog radiator fins, reducing cooling efficiency. Internal clogs from neglected coolant or leaks from impact damage or old age can also occur.
• Thermostat Issues: A stuck-open thermostat can cause the engine to run too cool (affecting emissions and efficiency), while a stuck-closed one will lead to rapid overheating.
• Coolant Quality/Compatibility: Using incorrect coolant types (e.g., mixing OAT with traditional silicated coolants) can lead to gel formation, corrosion, and system damage. Always use the specified coolant.
• Hose and Clamp Failures: Vibrations and heat cycles can lead to hoses cracking or clamps loosening, causing leaks.
• Degraded Coolant: Over time, coolant additives deplete, reducing its ability to prevent corrosion and cavitation. This emphasizes the importance of timely flushes.

Find a trusted shop on Repairius.