How to Change the Coolant in a 2019 Husqvarna TC85
Shop parts for a 2019 Husqvarna TC85 Dirt Bike.
Routine coolant changes are essential to the performance and longevity of your 2019 Husqvarna TC85. Regular service prevents overheating and ensures optimal engine temperature management, particularly for riders pushing their bikes in demanding motocross and off-road environments. Use these step-by-step instructions for safe and effective coolant service, along with important TC85-specific tips.
What Makes the TC85 Unique?
- High-performance 2-stroke engine: Runs hotter than most trail bikes, making clean, fresh coolant critical for reliability.
- Twin radiator setup: Both radiators must be emptied and refilled evenly to guarantee proper cooling efficiency.
- Precise capacity: Use the correct volume of coolant–overfilling or underfilling can cause performance issues.
What You Need
- Manufacturer-approved coolant (avoid mixing different coolant types/brands)
- Basic hand tools (socket set, screwdriver)
- Drain pan
- Clean rags
- Protective eyewear and gloves
Step-by-Step Coolant Change
- Ensure the bike is cool and stable.
Place the TC85 on a bike stand and allow the engine to cool fully before proceeding. Wear protective gloves and eyewear for safety–coolant is hazardous if it comes in contact with skin or eyes. - Remove the radiator cap.
The radiator cap is typically located at the top of the left-side radiator. Removing the cap before draining allows coolant to flow freely and rapidly as you open the drain bolt. - Locate the coolant drain bolt.
On the 2019 TC85, the drain bolt is usually found at the bottom of the water pump cover on the right side of the engine. Position your drain pan beneath this bolt. - Drain the coolant completely.
Remove the drain bolt and let all coolant fully exit both radiators. You may gently tip the bike side to side to ensure a complete drain. Take care not to spill coolant onto painted surfaces or the ground–dispose of used coolant at an approved recycling facility. - Inspect radiators and hoses.
Before refilling, visually inspect radiator fins for mud, debris, or bends. Clean carefully if needed. Examine all hoses and hose clamps for aging, cracks, or leaks and replace any questionable components. - Reinstall the drain bolt.
Tighten the drain bolt securely, but do not overtighten. Wipe away excess fluid. - Refill with fresh coolant.
Slowly pour the correct coolant into the radiator fill neck, allowing air bubbles to escape. On the TC85, fill until coolant is visible at the bottom of the cap neck but do not overfill. - Bleed the cooling system.
Some TC85 models feature a small bleed screw located on top of the cylinder head. Loosen this screw until coolant seeps out without bubbles, then retighten. This step helps purge trapped air to prevent overheating. - Replace the radiator cap.
Secure the cap and ensure it is properly seated to prevent leaks and maintain pressure. - Start and check the bike.
Start the engine and let it run at idle with the bike upright. Check for leaks. After a few minutes, shut off the bike and recheck the coolant level, topping off if necessary.
Additional TC85 Owner Tips
- Never mix coolant types–stick with the coolant specified by Husqvarna for the TC85.
- Inspect radiator fins regularly–bent or clogged fins reduce cooling performance. Straighten carefully if needed.
- Monitor for overheating or coolant loss after aggressive riding. Early detection prevents engine damage.
- Handle coolant safely–avoid contact with skin, eyes, or clothing, and clean up any spills immediately.
Maintain your 2019 Husqvarna TC85 cooling system for trouble-free performance on the track or trail. Consult your Owner's Manual for torque specs and coolant type if unsure, and always service your bike in a well-ventilated area for safety.
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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.