2016 Volvo VNL Coolant Capacity & Type

The 2016 Volvo VNL typically holds between 40 to 60 quarts (37.8 to 56.8 liters) of coolant, depending on the specific engine and cooling system configuration.

Quick Answer

• Total Cooling System Capacity: 40-60 quarts (37.8-56.8 Liters)
• OEM Coolant Specification: Volvo VCS-2 (Yellow/Green/Pink, OAT/NOAT - Nitrited Organic Additive Technology)
• Mix Ratio: 50/50 Pre-mix or concentrate diluted to 50/50 with distilled water

Capacity by Engine Option

The exact coolant capacity for your 2016 Volvo VNL will vary based on the engine installed. Volvo VNL trucks in this year range were commonly equipped with Volvo D11, D13, and D16 engines, as well as Cummins ISX engines. Always consult your owner's manual or service manual for the precise capacity for your specific VIN.

Flush Interval

Maintaining your coolant is critical for the longevity of your engine and cooling system components. Volvo recommends the following flush intervals for their VCS-2 coolant:

• Normal Duty: Every 600,000 miles (965,000 km) or 6 years, whichever comes first.
• Severe Duty: While not explicitly defined by Volvo as different from "normal," operating a heavy-duty truck in harsh conditions (extreme temperatures, heavy loads, frequent idling, dusty environments) might warrant more frequent checks and potentially a premature flush, depending on coolant testing results.

Always perform a coolant test periodically (e.g., at every oil change) to check the pH and freeze point, and to ensure the additive package is still robust. This helps determine if an earlier flush is necessary.

How to Refill & Bleed

Refilling and bleeding the cooling system on a 2016 Volvo VNL is a critical process to prevent air pockets, which can lead to localized overheating and engine damage. Here's a general procedure:

1. Safety First: Ensure the engine is completely cool before starting. Wear appropriate personal protective equipment (gloves, eye protection).
2. Drain Old Coolant: Open the drain petcocks on the radiator and, if applicable, on the engine block. Collect used coolant in an appropriate container for proper disposal.
3. Flush (Optional but Recommended): If the old coolant was degraded, consider flushing the system with distilled water until it runs clear. You can use a dedicated cooling system flush product if recommended.
4. Close Drains: Securely close all drain petcocks.
5. Refill: Begin refilling the coolant reservoir with the correct Volvo VCS-2 coolant (50/50 pre-mix or correctly diluted concentrate). Fill slowly to allow air to escape.
6. Start Engine: Start the engine and run it with the heater on full blast (this opens the heater core valve, allowing coolant to circulate through it). Keep the reservoir cap off.
7. Monitor Coolant Level: As the engine warms up and the thermostat opens, the coolant level in the reservoir will likely drop as more air purges. Continue to add coolant to maintain the "cold fill" or "min" level.
8. Bleed Air: Volvo VNL trucks typically self-bleed to a good extent. However, closely monitor the temperature gauge. Squeeze the upper and lower radiator hoses periodically to help dislodge air bubbles. Some trucks may have specific bleed valves; consult your service manual.
9. Vacuum Fill (Recommended): For best results and to ensure all air is removed, especially after a complete drain and flush, a vacuum fill tool is highly recommended. This tool evacuates all air from the system before drawing in the new coolant, ensuring a complete fill.
10. Final Check: Once the engine reaches operating temperature and holds steady, and the heater is blowing hot, replace the reservoir cap. Drive the truck and then let it cool completely. Recheck the coolant level and top off as needed. Check for any leaks.

Common Cooling System Issues for this Generation

Owners of 2016 Volvo VNL trucks may encounter several common cooling system issues, some of which are exacerbated by overlooked maintenance or generic coolants:

• Radiator Leaks: Over time, vibrations and environmental factors can lead to small cracks or leaks in the radiator, especially around the plastic end tanks if equipped.
• Hose Leaks: Coolant hoses can degrade, crack, or soften, leading to leaks. Always inspect hoses for swelling, cracking, or stiffness during routine maintenance.
• Water Pump Failure: The water pump is a wear item. Symptoms of failure include coolant leaks from the weep hole, bearing noise, or engine overheating.
• EGR Cooler Issues: Diesel engines, particularly with EGR systems, can experience EGR cooler failures, leading to coolant consumption, white smoke from the exhaust, or coolant in the oil.
• Thermostat Failure: A stuck-open thermostat will cause the engine to run cold, while a stuck-closed thermostat will lead to overheating. Both are detrimental to engine efficiency and longevity.
• Coolant Contamination/Degradation: Using incorrect coolant types or extending flush intervals too long can lead to coolant breakdown, silicate drop-out (if using conventional IAT in error), corrosion, and sludge formation, clogging critical passages.

Always use the specified Volvo VCS-2 coolant to prevent compatibility issues and ensure proper corrosion protection.

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