How to Change the Coolant in a 2018 Husqvarna FE250HQ
Shop parts for a 2018 Husqvarna FE250HQ Dirt Bike.Routine coolant changes are essential for keeping your 2018 Husqvarna FE250HQ performing at its peak–especially when riding in demanding off-road conditions. This guide walks you step by step through how to safely drain, flush, and refill your cooling system, along with important model-specific pointers every owner should know.
What You Will Need
- Fresh coolant compatible with aluminum radiators (avoid silicate-heavy automotive formulas)
- Distilled water for flushing
- Catch pan or bucket
- Socket/Allen set (to remove drain bolt and radiator cap)
- Clean funnel
- Rags and gloves
Instructions
- Park your bike securely. Place your FE250HQ in a well-ventilated, level area. Support it with a rear stand or ensure it's upright so coolant drains evenly.
- Allow the engine to cool completely. Never open the radiator cap when hot, as the cooling system is under pressure and can cause burns.
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Remove the radiator cap. Locate and unscrew the radiator cap to release any remaining pressure. This step allows coolant to drain quickly and thoroughly later.
Tip: The radiator cap is usually positioned just behind the steering stem on the left side. - Locate the coolant drain bolt. On the Husqvarna FE250HQ, the drain bolt is typically found on the lower area of the water pump cover–usually the right side of the engine. Place your catch pan under this point.
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Remove the drain bolt. Carefully loosen and remove the drain bolt, allowing the old coolant to empty into your catch pan.
Tip: Hold the bike upright during drainage to ensure both radiators empty fully. -
Flush the system (optional but recommended for neglected coolant). With the drain bolt removed, use distilled water to fill the system via the radiator neck. Reinstall the drain bolt, gently shake the bike side-to-side, and drain again. Repeat until clear water exits.
You can also use a 50/50 distilled water and vinegar mix if flushing stubborn deposits–just ensure to rinse thoroughly with distilled water after. - Reinstall the drain bolt. Inspect and replace the sealing washer if needed. Torque the bolt snugly, taking care not to overtighten.
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Refill with new coolant. Using a clean funnel, pour the recommended coolant slowly into the radiator neck. Pause as needed to let air escape. Gently squeeze the radiator hoses and rock the bike side-to-side to help purge air pockets.
The FE250HQ cooling system holds about 1.2 liters. Fill until the coolant is visible just beneath the filler neck. -
Bleed any remaining air (if equipped with a bleed bolt). Some Husqvarna engines include a small bleeder screw on the cylinder head. Loosen this briefly until only coolant (and no air) exits, then retighten.
Not all FE250HQs have this, so check your model. -
Run the engine with the radiator cap off for one minute, watching for bubbles as air escapes.
Shut off, let cool, top off coolant if necessary, and install the radiator cap securely. - Check the overflow reservoir. Fill to the recommended line if present.
- Inspect for leaks around the drain bolt, hoses, and cap after a short ride. Recheck coolant level once the engine is cool.
Model-Specific Tips for the 2018 Husqvarna FE250HQ
- This model features aluminum radiators–always use coolant formulated for aluminum and avoid automotive antifreezes containing silicates that could cause internal corrosion or deposit buildup.
- The FE250HQ's compact, lightweight engine operates at higher revs and temperatures off-road, making proper coolant maintenance especially critical for reliability.
- Overheating can cause water pump seal failure–check your oil for signs of coolant contamination periodically.
- After any coolant service, monitor the system and the digital display for overheating warnings during your first tests.
Why Regular Coolant Changes Matter
Old coolant loses its ability to prevent overheating and corrosion, which can result in costly engine or radiator repairs. Changing it as outlined above maximizes cooling performance in all conditions–from technical singletrack to high-speed fire roads.
For more parts and supplies specific to your 2018 Husqvarna FE250HQ, Shop parts for a 2018 Husqvarna FE250HQ Dirt Bike.
Related Shopping Categories
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Shop Radiator Hoses for a 2018 Husqvarna FE250HQ 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.