How to Change the Coolant in a 2018 Husqvarna TE250

Shop parts for a 2018 Husqvarna TE250 Dirt Bike.

Changing the coolant on your 2018 Husqvarna TE250 is an essential maintenance step to keep your two-stroke engine running reliably and prevent overheating on those aggressive rides. Follow these MotoSport proprietary steps carefully for a clean and safe coolant service tailored specifically to your dirt bike.

Why Change the Coolant?

Over time, coolant can break down, collect debris, and lose its ability to protect your TE250 engine and radiator from corrosion and heat. Regular replacement ensures you get optimal thermal protection and confidence in demanding conditions.

Tools – Supplies You Need

  • Fresh coolant approved for aluminum engines (performance coolants recommended for off-road use)
  • Socket set or T-handle wrench
  • Screwdriver (to remove radiator shrouds if necessary)
  • Clean drain pan or container
  • Distilled water (for flushing if needed)
  • Shop rags and gloves

Step-by-Step Coolant Change Guide

  1. Prepare the Bike:
    • Ensure the engine is completely cool before starting. Never open the radiator cap on a hot engine.
    • Position the motorcycle upright and level using a stand. This allows complete drainage and prevents spillage.
  2. Remove the Radiator Cap:
    • Slowly unscrew the radiator cap to release any residual system pressure.
  3. Locate – Open the Coolant Drain Bolt:
    • The primary drain bolt is typically located on the lower right side of the water pump. Place your drain pan underneath.
    • Use your wrench to carefully remove this bolt. Allow all the old coolant to drain fully.
  4. Flush the System (Optional but Recommended):
    • Reinstall the drain bolt and fill the radiator with distilled water.
    • Start and briefly run the engine (no more than a minute) to circulate the water. Shut off and let it cool. Drain out the flush water.
    • Repeat as necessary until the water runs clear, especially if previous coolant showed discoloration or debris. This helps maximize cooling system performance.
  5. Inspect Seals and Hoses:
    • Check hose clamps, radiator cap, and connections for signs of wear or leaks. Replace as needed to avoid any future coolant loss.
  6. Add New Coolant:
    • With the drain bolt secured, fill the radiator with fresh coolant until full.
    • Start the engine with the cap off, let it idle, and gently tilt the bike side-to-side to help release trapped air bubbles.
    • Top off the coolant as air is purged. Wait for coolant circulation and ensure no air pockets remain.
    • Replace the radiator cap securely.
  7. Check Levels – Final Inspection:
    • After a short test ride, double-check the coolant level with the engine cool and add more coolant if necessary.
    • Ensure there are no leaks at the drain bolt, hoses, or radiator cap.

Important Model Notes for the 2018 Husqvarna TE250

  • This TE250 features a two-stroke engine with a performance-oriented cooling system. Always use coolant formulated for aluminum components to prevent electrolysis and internal corrosion.
  • Take care not to overtighten the plastic radiator cap or the small drain bolt, as overtightening can cause cracking or stripping.
  • The 2018 TE250 runs hotter than older models due to its emission settings; keeping clean and fresh coolant is critical for engine longevity, especially if you ride technical trails or slow-speed terrain.
  • If you do frequent creek crossings or ride in muddy conditions, inspect the radiator more often for clogging and clean with low-pressure water only (never use a high-pressure washer directly on the radiator fins).

Coolant Disposal – Environmental Tips

Always dispose of old coolant at an authorized recycling facility. Never pour used coolant onto the ground or into drains; it is toxic to pets and harmful to groundwater.

Final Tips

  • Stick to your maintenance schedule—fresh coolant helps you avoid engine damage and expensive repairs down the line.
  • If you notice any consistent loss of coolant, inspect for head gasket leaks, hose issues, or possible internal engine problems.

Related Shopping Categories

Shop Radiators for a 2018 Husqvarna TE250 Dirt Bike.

Shop Coolant for a 2018 Husqvarna TE250 Dirt Bike.

Shop Temperature Sensors for a 2018 Husqvarna TE250 Dirt Bike.

Shop Tools for a 2018 Husqvarna TE250 Dirt Bike.

Shop Radiator Hoses for a 2018 Husqvarna TE250 Dirt Bike.

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.