How to Change the Coolant in a 2018 Sherco 250 SEF Factory
Shop parts for a 2018 Sherco 250 SEF Factory Dirt Bike.
Changing the coolant in your 2018 Sherco 250 SEF Factory is an essential maintenance task to keep your engine performing at its best and prevent overheating. This guide, exclusive to MotoSport.com, walks you through the process step by step, highlighting considerations unique to this model.
What You Need
- Approved engine coolant, such as Minerva Perma Universal D 4 -25°C
- Container to catch old coolant
- New gasket for radiator bleed screw (recommended)
- Basic hand tools (socket set, screwdrivers)
- Protective gloves – recommended
Before You Begin
- Allow the engine to cool completely before opening the cooling system to avoid burns.
- Park the bike on a level surface and keep it vertical throughout the process for accurate filling and draining.
- Never use plain water or non-approved fluids as coolant – doing so may cause engine damage.
- Properly dispose of old coolant at an approved collection center to protect the environment.
Step-by-Step Coolant Change Procedure
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Remove radiator cap and locate drain points:
With the engine cold, unscrew the radiator cap. Place your drain container beneath the engine, directly under the coolant drain bolt, typically located on the lower part of the water pump housing. -
Drain the coolant:
Remove the coolant drain bolt and allow the old coolant to flow out completely. To ensure complete drainage, remove the bleed screw on the left side of the radiator as well.
Note: You may also want to drain the overflow (expansion) tank by removing it, emptying, and cleaning as needed. -
Inspect the cooling system:
While the coolant is draining, check all hoses for cracks, wear, or brittleness. Squeeze hoses to confirm they are still pliable, and verify that hose clamps are secure and intact. -
Reinstall drain and bleed screws:
Fit a new gasket on the radiator bleed screw if possible. Tighten the drain plug to 6 Nm and the water pump housing screws to 10 Nm. -
Fill with new coolant:
Pour the recommended coolant into the radiator through the cap opening. Continue slowly until you see fluid at the bleed screw hole and no air bubbles escape – this ensures all air is purged from the system. Reinstall the bleed screw securely. -
Top off to correct level:
Continue filling the radiator until the coolant reaches the correct level mark (about 1.1 liters is standard for this model). Put the radiator cap back on firmly. -
Start and check for leaks:
Start the bike and let it idle for several minutes. Check for leaks around the drain and bleed screws and make sure the radiator cap and hose connections are tight. Gently squeeze the radiator hoses to confirm there are no trapped air pockets. -
Final fluid check:
After the engine fully cools, re-check the expansion tank and the radiator level. Top off coolant if necessary.
Unique Considerations for the 2018 Sherco 250 SEF Factory
- This model requires approximately 1.1 liters of coolant. It is designed for high-performance off-road use, so maintaining optimal cooling is especially critical under demanding riding conditions.
- Never substitute approved coolant with plain water or any unapproved fluid – only use specified products to avoid overheating and potential engine damage.
- If you notice coolant leaking from the weep hole beneath the water pump, it may indicate a failing water pump seal. Replacing this seal is a specialized job requiring partial engine disassembly – consult your authorized Sherco service center if needed.
- Always use a new gasket when reinstalling the bleed screw to prevent leaks.
Pro Tips
- Change the coolant annually or as recommended by your service manual for peak performance.
- Regularly inspect the coolant level and condition, especially before long trail rides or races.
- Record your coolant change date and details to stay on top of maintenance intervals.
Enjoy maximum reliability – and remember, MotoSport.com is your trusted partner for OEM replacement and performance parts for the 2018 Sherco 250 SEF Factory.
Related Shopping Categories
Shop Radiators for a 2018 Sherco 250 SEF Factory Dirt Bike.
Shop Coolant for a 2018 Sherco 250 SEF Factory Dirt Bike.
Shop Temperature Sensors for a 2018 Sherco 250 SEF Factory Dirt Bike.
Shop Tools for a 2018 Sherco 250 SEF Factory Dirt Bike.
Shop Radiator Hoses for a 2018 Sherco 250 SEF Factory 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.