How to Change the Coolant in a 2018 KTM 250XCW
Shop parts for a 2018 KTM 250XCW Dirt Bike.
Keeping your 2018 KTM 250XCW in peak condition means regular maintenance, including changing the coolant. This process is vital for optimal engine temperature management, which prevents overheating and ensures extended engine life. The following proprietary MotoSport step-by-step guide will walk you through changing the coolant on your 2018 KTM 250XCW, as well as highlight a few unique aspects specific to this model.
Tools and Supplies Needed
- Fresh coolant (KTM recommends a high-quality, silicate-free antifreeze with anti-corrosion additives).
- Basic hand tools: socket set, screwdrivers, pliers.
- Drain pan
- Clean rags
- Funnel
- Distilled water (for flushing if desired)
- Protective gloves
Changing the Coolant: Step-by-Step Instructions
- Preparation
- Allow the bike to cool down completely before starting, as the cooling system is pressurized and hot coolant can cause burns.
- Ensure the bike is upright on a stable, horizontal surface.
- Access the Radiator Cap
- Remove the seat and the radiator shrouds (plastics) as needed to access the radiator cap and top of the radiators.
- Slowly loosen and remove the radiator cap to release any residual pressure.
- Drain the Old Coolant
- Locate the coolant drain bolt on the water pump cover, which for the 2018 KTM 250XCW is typically a small bolt at the lowest point of the cover.
- Place the drain pan beneath this bolt to catch the used coolant.
- Using the appropriate socket, carefully remove the drain bolt and allow the coolant to fully drain. Loosening the radiator cap beforehand ensures rapid drainage.
- Inspect the drained coolant for contamination or debris. If necessary, flush the system with distilled water before proceeding.
- Reinstall Drain Bolt
- Once the system is empty (and flushed if desired), reinstall the drain bolt. Make sure the sealing washer is present and intact to prevent leaks.
- Refill With Fresh Coolant
- Using a funnel, pour new coolant into the radiator until the fluid reaches just above the radiator fins, as recommended by KTM for the 2018 250XCW.
- Bleed air from the system: on this model, you may need to gently tilt or bounce the bike, and you may open the small bleed screw if equipped, to allow trapped air to escape.
- Check and Adjust Coolant Level
- With the bike upright, ensure the coolant sits just above the radiator core fins. Add more coolant if needed, but do not overfill.
- Install the radiator cap securely.
- Start and Warm Up the Engine
- Start the bike and let it idle for a few minutes to circulate coolant and release remaining air bubbles.
- Shut off the engine, allow it to cool completely, and recheck coolant level. Top up if required.
- Reinstall All Plastics
- Reinstall any shrouds, the seat, or other panels removed during the process.
Notes Specific to the 2018 KTM 250XCW
- The coolant capacity for the 250XCW is relatively small, so avoid overfilling. Always use a silicate-free coolant to protect the magnesium alloy components in your engine and water pump.
- The 2018 KTM 250XCW does not have a dedicated coolant drain plug on the radiator; draining is performed at the water pump housing.
- When checking coolant, the level should be just above the radiator fins, and never to the brim, aiding thermal expansion and preventing overflow.
- Periodically inspect for leaks after any service, paying close attention to the water pump seals and radiator hoses.
- If you ride in extreme climates or frequently race, check and change coolant more often for maximum engine protection.
Final Thoughts
Staying ahead on coolant maintenance extends the life of your 2018 KTM 250XCW and ensures every ride is worry-free. Follow these steps to maintain your cooling system and keep your machine running strong from trail to track.
Related Shopping Categories
Shop Radiators for a 2018 KTM 250XCW Dirt Bike.
Shop Coolant for a 2018 KTM 250XCW Dirt Bike.
Shop Temperature Sensors for a 2018 KTM 250XCW Dirt Bike.
Shop Tools for a 2018 KTM 250XCW Dirt Bike.
Shop Radiator Hoses for a 2018 KTM 250XCW 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.