2017 Freightliner Cascadia: Coolant Capacity & Type

The 2017 Freightliner Cascadia cooling system holds approximately 46-52 quarts (43.5-49.2 liters) of coolant, depending on the engine and radiator configuration.

Quick Answer

• Total Cooling System Capacity: 46-52 quarts / 43.5-49.2 liters
• OEM Coolant Specification: Nitrite-Free Extended Life Coolant (ELC), typically red or pink. It must meet the Detroit Diesel DFS 93K217 specification.
• Mix Ratio: 50/50 mix of coolant concentrate and distilled water. Pre-mixed 50/50 solutions are recommended.

Capacity by Engine Option

Note: These are approximate values. Always refer to your owner's manual or the sticker on the coolant reservoir for the exact capacity of your truck's configuration.

Flush Interval

• Normal Duty: The recommended flush interval for a 2017 Freightliner Cascadia using a Nitrite-Free ELC is typically every 600,000 miles (965,000 km), 12,000 hours, or 6 years, whichever comes first.
• Severe Duty: For vehicles under severe duty conditions (heavy loads, extensive idling, extreme temperatures), it is recommended to test the coolant annually and adjust the service interval as needed. Some operators may choose a more conservative interval of 300,000 miles.

How to Refill & Bleed

The cooling system on the Cascadia is designed to be refilled easily, but it is critical to ensure no air is trapped in the system.

1. Ensure the engine is cool. Never open a hot cooling system.
2. Mix coolant: If using concentrate, mix it with distilled water to a 50/50 ratio in a clean container before adding it to the system.
3. Fill slowly: Add the coolant mixture to the coolant reservoir (surge tank). Fill to the "MAX COLD" line.
4. Run the engine: Start the engine with the heater set to the highest temperature and the fan on high. This ensures coolant circulates through the heater core.
5. Monitor level: As the engine warms up, the thermostat will open, and the coolant level in the reservoir may drop. Add more 50/50 coolant mixture to maintain the level between the "MIN" and "MAX" marks.
6. Check for leaks: Inspect all hoses, the radiator, and the water pump for any signs of leaks.
7. Bleed air (if necessary): Most modern Cascadias have self-bleeding systems. However, if you suspect trapped air (e.g., erratic temperature gauge readings), you can help the process by gently squeezing the upper radiator hose. For persistent issues, a vacuum-fill tool is the most effective method to ensure a complete, air-free fill.

Common Cooling System Issues

• EGR Cooler Failure: A common issue on this generation of trucks. A failing EGR cooler can cause coolant to be consumed, leading to white smoke from the exhaust. It can also leak coolant externally.
• Radiator Leaks: Plastic end tanks on the radiator can crack over time, leading to coolant leaks, especially at the seams where the plastic is crimped to the aluminum core.
• Water Pump Failure: The water pump is a wear item. Symptoms of failure include a coolant leak from the weep hole on the pump, a wobbling pulley, or a grinding noise from the front of the engine.
• Hose Deterioration: Rubber hoses can become hard and brittle over time. Pay special attention to the large radiator hoses and the smaller heater hoses. Check for swelling, cracking, or soft spots.

Find a trusted shop on Repairius.