How to Change the Coolant in a 2018 Husqvarna TC65: Complete Owner's Guide
Shop parts for a 2018 Husqvarna TC65 Dirt Bike.
Maintaining your 2018 Husqvarna TC65's cooling system is a must for engine longevity and optimal performanceespecially for riders who demand maximum reliability on the track. Husqvarna's two-stroke mini-racer features a compact, high-performance engine that benefits from regular coolant changes to prevent overheating and avoid internal corrosion.
Why Change the Coolant?
- Prevents overheating– Dirt bikes like the TC65 work hard and generate lots of heat; old or contaminated coolant can lose effectiveness.
- Protects internal components– Fresh coolant contains additives that reduce corrosion within the cylinder, water pump, and radiator.
- Ensures consistent performance– Proper coolant levels and quality are crucial for cool engine operation under race conditions.
Before You Start: What Every 2018 TC65 Owner Should Know
- The cooling system capacity for the 2018 TC65 is approximately 0.55 liters (0.58 quarts). Do not overfill.
- Use high-quality, ethylene glycol-based coolant approved for aluminum engines. Avoid pure water or automotive coolants not formulated for motorcycles.
- Always check for potential leaks after a coolant servicehose connections and radiator integrity are critical to avoid overheating and loss of performance.
Required Tools & Supplies
- Allen wrenches and socket set (for removing panels and drain bolt)
- Drain pan
- Funnel
- Clean, lint-free rag
- Approved motorcycle coolant (glycol-based, aluminum compatible)
- Safety goggles and gloves
Step-by-Step Instructions
-
Prepare the TC65
Place the bike securely on a stand with the engine cool. Remove the seat and any panels blocking access to the radiators and cylinder head cap. -
Drain the Old Coolant
Position a drain pan beneath the water pump.
Loosen the radiator cap to release pressure (do this slowly). Locate the coolant drain boltusually on the lower water pump cover or engine side cover. Remove the bolt and let the coolant completely drain.
Tip: Tipping the bike gently side to side helps expel trapped coolant. -
Flush (Optional but Recommended)
If the old coolant was dirty or contaminated, fill the system with distilled water, reinstall the drain bolt, and briefly run the engine (just until warm, never overheating). Drain thoroughly. -
Refill with New Coolant
Reinstall and tighten the drain bolt.
Using a funnel, slowly refill the radiator through the cap opening with new coolant. Fill to the bottom of the radiator neck or "max" line; avoid overfilling. -
Bleed Air from the System
With the radiator cap off, tilt and rock the bike gently to dislodge air bubbles. Squeeze radiator hoses by hand to help purge air.
Start the engine and let it idle for 1-2 minutes while monitoring the coolant level and checking for leaks.
Top off coolant if necessary, then securely reinstall the radiator cap. -
Final Checks
Clean up any spills thoroughly. Reinstall panels and the seat.
Take a short test ride and, after full engine cooling, recheck the coolant level.
Dispose of the old coolant responsiblynever down drains or on soil.
Model-Specific Notes for the 2018 Husqvarna TC65
- The TC65 uses a lightweight, aluminum radiator design. Make sure not to cross-thread the radiator cap or overtighten bolts, as the aluminum can deform or strip.
- The system has compact coolant passages; air pockets are more likely, so careful bleeding is a must.
- Always inspect gaskets and o-rings for wear on the water pump and drain boltreplace if needed to avoid post-service leaks.
- For best performance, check coolant before every race or intense ride. Rapid changes in level may indicate a leak or head gasket issue, which is critical to address on the TC65's high-performance 2-stroke engine.
When to Change Coolant on the TC65
- Minimum: Every 12 months or after 20-25 hours of ride time (whichever comes first)
- Sooner if: You compete in muddy, sandy, or extreme climates, or the coolant appears discolored
With your 2018 Husqvarna TC65 coolant refreshed, you're ready for another season of powerful, reliable rides. Prioritize cooling system maintenance for maximum performance on the track and peace of mind between motos.
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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.