How to Change the Coolant in a 2020 Husqvarna FC350

Shop parts for a 2020 Husqvarna FC350 Dirt Bike.

Keeping your 2020 Husqvarna FC350’s cooling system in top shape is crucial for performance and reliability, especially during intense rides. Here’s a step-by-step proprietary guide from MotoSport for changing your coolant properly, with expert notes unique to this FC350 generation.

Preparation

  • Allow the engine to cool completely before starting. Hot coolant can cause serious burns.
  • Position the bike upright on a stable stand for easy access to the radiator and water pump area.
  • Gather safety gloves, eye protection, a catch pan, and the correct coolant – your model works best with a high-performance, racing-grade coolant formulated for aluminum radiators and magnesium casings.

Draining the Old Coolant

  • Remove the radiator cap to release any system pressure. This step is important for safe, complete draining.
  • Place the catch pan beneath the water pump cover, located on the lower-right side of the engine.
  • Remove the coolant drain bolt at the bottom of the water pump cover. Be ready for the coolant to flow out quickly; ensure the pan is aligned.
  • For a more thorough flush, disconnect the lower radiator hose and allow any remaining coolant to drain. Some FC350 owners also choose to flush with distilled water, running the engine briefly before final draining (never run the engine without coolant for more than 30 seconds).

Refilling With New Coolant

  • Reinstall and tighten the drain bolt. Inspect and replace the seal ring if needed to prevent leaks. Torque to manufacturer specs (generally 10 Nm for this model).
  • Carefully pour new coolant into the radiator filler neck until just below the top – do not overfill. Always use coolant that is compatible with magnesium and aluminum, as these materials are found extensively in the FC350's cooling system.
  • Gently rock the bike side-to-side to release any air bubbles and top off if necessary.
  • Refit the radiator cap securely.

Priming the Cooling System

  • Start the engine and allow it to idle for a minute. Monitor the level in the radiator after shutting the engine down again. Add more coolant if needed as trapped air works its way out.
  • Inspect for leaks at the drain bolt, hose fittings, and around the radiator cap.

Model-Specific Notes for the 2020 Husqvarna FC350

  • The 2020 FC350 platform uses a high-compression engine that operates at tight tolerances, making it extremely sensitive to elevated temperatures. Be vigilant for signs of overheating and always address any coolant loss or leaks promptly.
  • If you ride in extreme conditions or at high altitude, consider installing an auxiliary coolant recovery tank to help minimize the risk of overheating and fluid loss.
  • Factory torque specs for the drain bolt and hose clamps should always be followed to prevent cracks in the magnesium water pump cover.

Coolant maintenance on your 2020 Husqvarna FC350 helps safeguard engine performance and reliability. MotoSport stocks all the parts and premium coolants needed for the job—never compromise on cooling system care.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.