How to Change the Coolant in a 2018 Husqvarna TC85: MotoSport Exclusive Guide
Shop parts for a 2018 Husqvarna TC85 Dirt Bike.
Regularly changing the coolant in your 2018 Husqvarna TC85 is critical for optimal engine performance and longevity, ensuring your mini motocrosser stays cool under race conditions and long trail rides. The TC85 shares much of its engine cooling design with the KTM and GASGAS 85cc platforms, but has its own nuances you should know when performing maintenance. Follow this proprietary MotoSport step-by-step guide for a safe, thorough coolant changewhether prepping for a national or another hard-charging weekend.
What Makes the 2018 TC85 Coolant System Unique?
- Uses a dual-radiator system with a crossover, meaning you must ensure both radiators are fully drained and refilled.
- Features a bleeder port on the cylinder head to properly remove air from the cooling systema key step many miss on this model.
- Coolant capacity is approximately 0.95 liters (1 US quart). Never overfill.
- Always use a high-quality motorcycle-specific coolant; avoid mixing different coolant types (e.g., green vs. red).
Step-By-Step: Changing Coolant in Your TC85
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Allow the engine to cool completely.
Never open the radiator cap on a hot engine, as pressure and hot coolant can cause injury. -
Remove the right side cover and fuel tank if needed for easy radiator access.
You may only need the right shroud off for basic access; consult your owner's manual for instructions and always be gentle when handling plastic parts. -
Position a drain pan below the water pump or designated coolant drain bolt.
On most TC85s, the drain bolt is on the lower water pump cover. Loosen the radiator cap first to relieve system pressure (make sure engine is cool). -
Remove the coolant drain bolt and allow coolant to drain from both radiators.
Tilting the bike gently side to side can help evacuate remaining fluid from both sides. -
Inspect and (preferably) replace the copper crush washer on the drain bolt.
Reuse only if necessaryflip over the washer if you must reuse it to ensure a fresh seal. - Reinstall the drain bolt and torque to specification (typically 10 Nm/7.4 ft-lb).
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Slowly refill the system via the radiator neck with fresh coolant.
Fill up to just above the top of the radiator core/fins but below the cap seat. -
Bleed trapped air from the cylinder head bleeder screw.
Crack this screw (just above the cylinder exhaust port) until air bubbles escapewhen only coolant flows in a steady stream, retighten. -
Check for leaks, then reinstall the radiator cap and bodywork.
Run the engine for a few minutes and let cool again, then remove the cap and top off if necessary. Bleed air again if needed. - Dispose of used coolant safelynever pour down drains or on the ground.
Important Tips for 2018 TC85 Owners
- Verify you never mix coolant types; chemical incompatibility can damage the cooling system.
- Watch for mud and debris clogging the radiators, especially after muddy ridesthis can cause overheating.
- If your TC85 overheats or regularly needs coolant, inspect for leaks at hoses, water pump, and radiator seams.
- Wear gloves and goggles for splash protectioncoolant can irritate skin and eyes.
Stay ahead of maintenance for your Husqvarna TC85 and maximize your ride every moto. For all the OEM and aftermarket parts you need to perform this or any other service, shop parts for a 2018 Husqvarna TC85 Dirt Bike.
Related Shopping Categories
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Shop Radiator Hoses for a 2018 Husqvarna TC85 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.