How to Change the Coolant in a 2018 Sherco 300 SE FACTORY: Step-by-Step Guide
Shop parts for a 2018 Sherco 300 SE FACTORY Dirt Bike.
If you own a 2018 Sherco 300 SE FACTORY, maintaining optimal engine temperature is crucial for peak off-road performance and engine longevity. Regularly changing the coolant will keep your engine running cool and protect essential components from corrosion and overheating. This guide is uniquely crafted for MotoSport.com customers and specifically addresses key steps and special considerations for this MMY dirt bike.
What You Need
- New coolant (Minerva Perma Universal D 4 -25°C or Sherco-approved equivalent)
- Service tools: sockets, hex keys, screwdriver, funnel
- Drain pan/container for old coolant
- Clean rags
- Torque wrench (recommended for correct tightening)
- Fresh radiator bleed screw gasket (recommended)
- Personal protection (gloves and safety glasses)
Important Notes for the Sherco 300 SE Factory Owner
- Do not use plain water or unapproved fluids in the cooling system. Only specified coolants protect your engine from internal damage – see your manual for approved fluids.
- Coolant capacity is approximately 1.1 liters. Overfilling or underfilling may compromise cooling performance.
- The bleed screw is located on the left side of the radiator and must be properly tightened (8 Nm) to avoid leaks or air pockets.
- Always dispose of old coolant at an approved collection facility to protect the environment.
Step-by-Step Coolant Change Procedure
-
Allow the Bike to Cool
Never attempt to open the radiator or drain the coolant while the engine is hot. Hot coolant can spray and cause burns. -
Stabilize the Motorcycle
Position the bike upright on a level surface using a stand for safety and access. -
Locate Drain and Fill Points
Place the drain pan underneath the water pump area on the lower engine/lh side.
Identify the radiator cap and the bleed screw on the left side of the radiator. -
Drain the Old Coolant
Remove the radiator cap to vent the system.
Unscrew the coolant drain bolt at the water pump area. Allow coolant to completely drain into your pan.
Once drained, refit the plug securely. -
Open the Bleed Screw
Loosen (do not remove) the radiator bleed screw (left side) with a hex key. This step ensures that trapped air exits while you refill. -
Refill with Fresh Coolant
Using a funnel, slowly pour the specified coolant into the radiator through the cap opening.
Watch the bleed screw—when a steady stream of coolant (no bubbles) appears, retighten the bleed screw with a new gasket (8 Nm torque recommended). -
Top Off and Inspect
Continue to fill until the coolant reaches the "LEVEL" mark in the expansion tank.
Refit the radiator cap. -
Start and Circulate
Start the engine and let it idle for a few minutes with the radiator cap secured.
Shut off engine, allow it to cool, and recheck fluid level. Top off as needed. -
Final Inspection
Check for leaks, especially at the drain bolt, bleed screw, and hose connections.
Ensure coolant level remains at the correct mark after several ride cycles.
Model-Specific Advice for Owners
- If your 2018 Sherco 300 SE FACTORY exhibits rapid coolant loss, visible leaks, or overheating, check for signs of water pump seal wear and inspect the bleed screw gasket at every service.
- Always use the correct torque when tightening coolant system screws to prevent cracking the radiator or stripping threads.
- This bike's cooling system is well-regarded for efficiency, but performance depends on eliminating air pockets during refills. Bleeding is absolutely crucial with this model.
Proper coolant maintenance is a simple way to protect your Sherco’s high-performance engine for many rides to come.
Related Shopping Categories
Shop Radiators for a 2018 Sherco 300 SE FACTORY Dirt Bike.
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Shop Temperature Sensors for a 2018 Sherco 300 SE FACTORY Dirt Bike.
Shop Tools for a 2018 Sherco 300 SE FACTORY Dirt Bike.
Shop Radiator Hoses for a 2018 Sherco 300 SE 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.