2022 Volvo VNR — Coolant Capacity & Type

The 2022 Volvo VNR holds approximately 40-42 quarts (37.8-39.7 liters) of coolant in its cooling system.

Quick Answer

• Total Cooling System Capacity: 40-42 quarts (37.8-39.7 liters)
• OEM Coolant Spec: Volvo VCS-2 (Yellow/Orange, Nitrite-Free Organic Acid Technology - NF-OAT)
• Mix Ratio: 50/50 Pre-mix or 50/50 concentrate with distilled water

Capacity by Engine Option

The 2022 Volvo VNR is primarily equipped with the Volvo D11, D13, or D13TC engine. The coolant capacity remains relatively consistent across these engine options due to the common cooling system architecture designed for heavy-duty applications.

Flush Interval

Maintaining the coolant flush interval is crucial for the longevity of your 2022 Volvo VNR's cooling system and engine. Volvo recommends the following:

• Normal Duty: Every 3 years or 300,000 miles, whichever comes first.
• Severe Duty: Every 2 years or 150,000 miles, whichever comes first.

Always refer to your vehicle's owner's manual for the most accurate and up-to-date service intervals.

How to Refill & Bleed

Refilling and bleeding the cooling system on a heavy-duty truck like the Volvo VNR requires careful attention to ensure all air is removed, preventing hot spots and potential engine damage. It is highly recommended to have this procedure performed by a qualified technician.

1. Drain: Completely drain the old coolant from the radiator and engine block. Properly dispose of used coolant.
2. Flush (Optional but Recommended): If switching coolant types or if the old coolant was contaminated, perform a thorough flush with distilled water until the water runs clear. Some situations may require a chemical flush.
3. Refill: Close all drain plugs. Begin refilling the system slowly with the specified Volvo VCS-2 coolant (50/50 mix). Fill through the expansion tank.
4. Bleed Air:
   • Start the engine with the heater on full hot and the expansion tank cap off.
   • Allow the engine to reach operating temperature. As the thermostat opens, coolant will circulate, and air will begin to purge.
   • Watch the coolant level in the expansion tank and top it off as needed. Some Volvo VNR models may have a bleed screw or valve on the thermostat housing or upper radiator hose to facilitate air removal. Consult your service manual for exact locations.
   • Utilizing a vacuum fill tool is the most effective method for heavy-duty cooling systems to ensure complete air removal swiftly.
5. Final Check: Once the engine is cool, recheck the coolant level and top off if necessary. Monitor the level over the next few driving cycles.

Common Cooling System Issues for this Generation Volvo VNR

While the Volvo VNR is a robust truck, certain cooling system issues can arise, particularly due to the demands of heavy-duty operation:

• Coolant Leaks: Hoses, radiator, water pump, and EGR cooler can be common leak points due to vibration, age, or extended use. Regularly inspect for drips or residue.
• EGR Cooler Failures: The Exhaust Gas Recirculation (EGR) cooler is an integral part of emissions systems and can be a source of coolant leaks into the exhaust or combustion chamber, leading to white smoke or coolant loss without visible external leaks.
• Thermostat Malfunctions: A stuck open or closed thermostat can lead to the engine running too cold or overheating, impacting fuel efficiency and engine longevity.
• Radiator Core Clogging: Over time, sediment or improper coolant mixtures can lead to clogging of the radiator fins, reducing cooling efficiency. External debris can also block airflow.
• Deterioration of Coolant: Failure to adhere to flush intervals or using incorrect coolant types can lead to premature breakdown of the coolant's corrosion inhibitors, causing internal damage to cooling system components.

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