How to Change the Coolant in a 2018 Husqvarna FC450 Rockstar Edition

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The 2018 Husqvarna FC450 Rockstar Edition is a high-performance motocross bike, engineered for both racing and reliable operation. To ensure the cooling system delivers consistent engine temperature control – protecting the engine's advanced components and lightweight design – it's vital to change the coolant as part of your regular maintenance.

Tools and Supplies Needed

  • New coolant (OEM recommended or high-quality motocross-specific coolant)
  • 8mm socket or wrench
  • Drain pan
  • Funnel
  • Shop rags
  • Protective gloves

Step-by-Step Coolant Change Guide

  1. Preparation:
    • Allow the engine to cool completely before servicing to prevent burns.
    • Place the bike on a stable stand on level ground.
    • Remove the skid plate if equipped, as the Rockstar Edition models often feature a carbon fiber reinforced skid plate for added protection.
  2. Drain Old Coolant:
    • Remove the radiator cap slowly to release any residual pressure.
    • Position a drain pan underneath the water pump (right side of the engine, near the clutch cover).
    • Use the 8mm socket to remove the coolant drain bolt (typically at the lowest point on the water pump cover) and let the old coolant drain completely.
    • Check the drained coolant for debris or discoloration – this could indicate cooling system contamination or component wear.
  3. Flush the System (Optional but Recommended):
    • If desired, flush the system with distilled water to ensure any remaining old coolant or particles are removed. Pour water into the radiator, replace the cap temporarily, run the engine briefly, then drain again. Repeat until clean water drains.
  4. Reinstall the Drain Bolt:
    • Secure the drain bolt back into place and tighten to manufacturer-recommended torque.
  5. Add New Coolant:
    • Using a funnel, slowly fill the radiator with the recommended coolant up to the base of the filler neck. The 2018 Husqvarna FC450 Rockstar Edition features an updated cooling system with a new center tube, designed for improved efficiency and mass-centralization. Use a high-quality coolant compatible with aluminum engine components for maximum protection.
  6. Bleed Air from the System:
    • Tilt the bike side-to-side gently to help trapped air escape.
    • Briefly run the engine with the radiator cap off, then top off coolant if necessary, ensuring circulation through the updated cooling pathways unique to the Rockstar Edition.
  7. Replace Radiator Cap and Check for Leaks:
    • Reinstall and tighten the radiator cap. Inspect all hoses, bolts, and the water pump area for any leaks.
  8. Reattach Skid Plate:
    • If removed earlier, refit the carbon fiber reinforced skid plate, making sure the mounting hardware is secure.
  9. Dispose of Old Coolant Responsibly:
    • Take drained coolant to a proper recycling facility. Do not pour into drains or on the ground.

2018 FC450 Rockstar Edition Highlights for Coolant Service

  • Updated cooling system: The Rockstar Edition includes a new center tube in the radiators which helps maintain optimal engine temperatures. Its advanced design means the cooling system is optimized for high performance and needs to be free of blockages – take special care during flush and refill.
  • Compact SOHC engine design: This model features a lighter, more centralized engine layout, increasing the importance of regular coolant checks to protect internal components under extreme conditions.
  • OEM parts and torque specifications: Always use quality replacement parts and tighten bolts to spec. You can find all the necessary components for your 2018 Husqvarna FC450 Rockstar Edition at MotoSport.com.

Final Tips

  • Check coolant level before every ride to ensure peak performance and maximize the life of your engine.
  • Periodically inspect hoses and radiator for signs of wear or leaks.
  • Follow the maintenance interval in your owner's manual for routine coolant changes.

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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.