How to Change the Coolant in a 2018 Husqvarna TE150

Shop parts for a 2018 Husqvarna TE150 Dirt Bike.

Regularly changing the coolant in your 2018 Husqvarna TE150 keeps your engine protected from overheating, freezing, and corrosion. This guide is built specifically for your model and covers essential tips for the TE150 owner. Follow these steps for a safe, efficient coolant swap:

What You'll Need

  • Fresh coolant compatible with aluminum radiators
  • Drain pan
  • Socket wrench set
  • Funnel
  • Clean rags
  • New coolant drain bolt washer (recommended)
  • Distilled water (optional for flushing)

Preparation

  • Ensure the engine is completely cool before starting. Opening the system while hot can lead to severe burns and injury—the coolant in a TE150 operates under pressure and high temperatures – let it cool off fully.
  • Place your bike upright on a stand for stability during service.

Draining the Old Coolant

  • Locate the radiator cap on the right side of the bike. Do not remove yet.
  • Position a drain pan under the water pump area.
  • Find the coolant drain bolt on the water pump housing (bottom right side of the engine).
  • Remove the drain bolt using a socket wrench. Little coolant will come out initially while the radiator cap is on—this controls spillage and makes the job cleaner.
  • Now, slowly open the radiator cap. As you break the vacuum, coolant will flow out rapidly into your drain pan.
  • If you're flushing, re-install the drain bolt, fill the radiator with distilled water, re-install the cap, run the bike for a few minutes, let cool, then repeat the drain steps to ensure thorough cleaning.

Inspect Critical Components

  • The TE150 uses head and cylinder locating pins; ensure they aren't disturbed during coolant swaps or any service near the top end. Pins can fall into the engine if dislodged.
  • Inspect the old coolant for signs of oil (milky color) or excessive debris, as this may suggest other issues requiring attention.

Refilling with New Coolant

  • Install a new washer on the drain bolt (recommended for leak prevention) and reinstall the bolt.
  • Slowly fill the radiator with new coolant using a funnel. Watch the level and allow air to escape for an even fill.
  • Stop filling when coolant appears at the base of the radiator neck. Do not overfill, as space for expansion is required when the engine is hot.
  • Reinstall the radiator cap securely.

Final Checks

  • Start the bike, run it until fully warm, then shut off and let it cool again. Check coolant level—top off if necessary.
  • Inspect all hoses, clamps, and the drain bolt for any leaks after first ride.

Special Considerations for the TE150

  • This model's compact engine means maintaining proper cooling is critical, especially for technical trail riding where low-speed airflow is common.
  • Routinely check your radiator fins for obstructions; bent or clogged fins can reduce cooling efficiency.
  • Be mindful that the TE150's aluminum cylinder head and radiators require a coolant designed for mixed-metal systems to prevent corrosion.

Following these steps protects your 2018 Husqvarna TE150 from overheating, ensures longevity, and keeps you riding with confidence. Check your coolant at every major service interval and after difficult rides to maintain optimal performance.

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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.