2020 Volvo VNR Serpentine Belt: Routing, Replacement, and Part Numbers

Quick Answer

The 2020 Volvo VNR typically uses a single serpentine belt to drive its accessories. Due to potential variations in engine configurations (e.g., Volvo D11, D13, D16), it's crucial to verify the exact belt length and rib count for your specific truck. We strongly recommend checking the existing belt's part number or consulting a Volvo dealership with your VIN for absolute certainty.

• Belt Length & Rib Count: Varies by engine. (e.g., D13 engines often use a 8-rib belt, approximately 2300-2400mm in length, but this MUST be verified).
• OEM Belt PN: Consult Volvo Parts Department with VIN.
• Aftermarket Cross-references:
  • Gates: K08xxxx (example, actual PN depends on length and rib count, e.g., K080906 for an 8-rib, ~90.6-inch effective length in some applications)
  • Dayco: 508xxxx (example, actual PN depends on length and rib count)
  • Continental Elite: 408xxxx (example, actual PN depends on length and rib count)
• Auto-Tensioner PN: Consult Volvo Parts Department with VIN.
• Idler Pulley PN: Consult Volvo Parts Department with VIN.

Belt Routing

Always photograph your existing belt routing before removal! This is the best way to ensure correct reinstallation, especially on complex commercial vehicle systems.

For most Volvo VNR trucks with a D11, D13, or D16 engine, the serpentine belt routing generally follows a path designed to drive essential components efficiently. While the exact diagram may vary slightly, a common routing path for the main serpentine belt is as follows. Always visually confirm this routing against your specific engine configuration.

1. Crankshaft Pulley: The belt originates from and is driven by the large crankshaft pulley, located at the bottom center of the engine.
2. A/C Compressor: From the crankshaft pulley, the belt typically goes up and over the A/C compressor pulley.
3. Idler Pulley(s): After the A/C compressor, the belt might engage one or more idler pulleys. These pulleys help guide the belt and maintain proper tension. Pay close attention to the number and location of these idlers.
4. Alternator: The belt then proceeds to the alternator pulley, usually located higher up on the engine.
5. Power Steering Pump: From the alternator, the belt often wraps around the power steering pump pulley.
6. Water Pump: Next, the belt typically runs to the water pump pulley.
7. Automatic Tensioner: Finally, the belt passes through the automatic tensioner pulley. The tensioner is responsible for applying constant pressure to the belt, keeping it taut and preventing slippage.

This sequence ensures all accessories receive power from the engine. Consult your vehicle