2016 Freightliner Cascadia Coolant Capacity & Type

The 2016 Freightliner Cascadia holds approximately 52-68 quarts (49-64 liters) of coolant in its cooling system, depending on the engine and radiator configuration.

Quick Answer

• Total Cooling System Capacity: Approximately 52-68 quarts (49-64 liters)
• OEM Coolant Specification: Extended Life Coolant (ELC) – Organic Acid Technology (OAT) or Hybrid Organic Acid Technology (HOAT).
  • Color: Typically red, purple, or sometimes pink/orange.
  • Manufacturer Spec: Refer to Detroit Diesel DFS93K217 or Cummins CES 14603 for appropriate ELC coolants.
• Mix Ratio: 50/50 pre-mix or concentrate diluted to 50/50 with distilled water.

Capacity by Engine Option

To provide the most accurate coolant capacity, it's essential to identify the specific engine installed in your 2016 Freightliner Cascadia. Capacities can vary based on engine size, radiator type, and whether an auxiliary heater is present.

Always consult your owner's manual or the engine manufacturer's specifications for the precise capacity of your particular vehicle configuration.

Flush Interval

Maintaining your coolant is critical for the longevity of your engine. The flush interval typically depends on the type of coolant used and operating conditions.

• Normal Duty: For Freightliner Cascadia trucks using an Extended Life Coolant (ELC) meeting the specified OEM standards, the typical flush interval can be as long as 6 years or 600,000 miles (965,000 km), whichever comes first. This applies when the coolant is properly maintained and regularly tested.
• Severe Duty: If your truck operates under severe conditions (e.g., extreme temperatures, heavy hauling, frequent idling, dusty environments), or if a non-ELC coolant is used, it is advisable to inspect and potentially flush the system more frequently, potentially every 2-3 years or 250,000-300,000 miles (400,000-480,000 km). Regular testing of the coolant will help determine its condition and the need for earlier replacement.

Always refer to your vehicle's maintenance schedule and engine owner's manual for the most accurate and up-to-date information on coolant service intervals.

How to Refill & Bleed

Properly refilling and bleeding the cooling system after a flush or repair is crucial to prevent air pockets, which can lead to overheating. For the 2016 Freightliner Cascadia, the general procedure is as follows:

1. Safety First: Ensure the engine is cool and the vehicle is on a level surface. Wear appropriate safety gear (gloves, eye protection).
2. Drain the Old Coolant: Open the petcock on the bottom of the radiator and any engine block drains to thoroughly drain the old coolant. Collect it in an appropriate container for recycling.
3. Flush (Optional but Recommended): If performing a full flush, close the drains, fill with distilled water or a reputable cooling system flush product, run the engine to operating temperature with the heater on high, then drain again. Repeat until the drained water runs clear.
4. Close Drains: Securely close all drain valves.
5. Refill: Begin filling the cooling system through the expansion tank or radiator fill neck with the correct 50/50 ELC coolant mixture. Fill slowly to allow air to escape.
6. Start Engine & Bleed: Start the engine and run it at a fast idle (around 1000-1200 RPM) with the heater on full hot and fan on low. This helps open the thermostat and allows coolant to circulate through the heater core.
7. Monitor Coolant Level: As the engine warms up, the coolant level in the expansion tank will likely drop. Continue to top it off to the