How to Change the Coolant in a 2013 Honda CRF150F
Shop parts for a 2013 Honda CRF150F Dirt Bike.
Routine coolant changes are critical to keeping your 2013 Honda CRF150F performing at its best—preventing overheating, internal corrosion, and premature part failure. This process is straightforward, but requires attention to detail and the right supplies for your model. Here is MotoSport.com's proprietary guide to changing your CRF150F coolant.
What You Need
- Fresh motorcycle-specific coolant (never use automotive coolant in off-road bikes)
- Distilled water (for flushing)
- 8mm socket or wrench
- Catch pan for old coolant
- Clean rags
- Funnel (optional for easy pouring)
- Protective gloves
Step-by-Step Coolant Change Guide
- Allow Engine to Cool: Always start with a completely cool engine to prevent burns from hot coolant or pressurized steam.
- Remove Radiator Cap: Lift the seat if needed for access, and then unscrew the radiator cap to relieve system pressure and promote draining. (Never open the cap on a hot engine.)
- Locate and Remove Drain Bolt: Place your catch pan under the water pump. On the CRF150F, the coolant drain bolt is typically the lowest bolt on the water pump cover. Use your 8mm wrench to remove it and let the coolant completely drain.
- Flush the System: Replace the drain bolt and fill the radiator with distilled water. Run the engine for a minute (watch temperature—do not overheat or run dry), then shut off and drain again. Repeat until the drained water runs clear.
Distilled water prevents mineral buildup and is less corrosive than tap water. - Reinstall Drain Bolt: Securely reinstall the drain bolt after flushing, tightening it snug but not overtightened to avoid damaging the threads.
- Add New Coolant: Using a funnel, pour fresh coolant into the radiator slowly. Fill to the very top. Air pockets may be trapped—to remove them, gently rock the bike side to side and, if possible, kick the engine over by hand a few times (with the spark plug disconnected for safety).
Check that the coolant level is still at the top. Top off if needed. - Check for Leaks: Replace the radiator cap securely (ensure it clicks firmly into place). Run the engine with the radiator cap on for a few minutes, shut it off, and allow it to cool completely. Inspect for leaks at the drain bolt and around the radiator.
- Recheck Coolant Level: After the engine cools completely, remove the radiator cap and recheck the coolant level. Add more if necessary. It is common for the level to drop slightly after the first heat cycle as air escapes.
Special Tips for the 2013 Honda CRF150F
- Cooling System Design: The CRF150F uses a simple, open cooling system without an expansion tank. Overfilling will result in excess coolant being expelled through the overflow as the engine warms up–always fill right to the neck but no more.
- Flush Frequency: For typical off-road use, flush and replace coolant every 1–2 years, or more often if you ride in sandy or muddy conditions.
- Coolant Selection: Use a silicate-free motorcycle coolant specifically designed for aluminum engines/radiators. Avoid "universal" or car coolants.
- Radiator Cap Condition: Inspect the rubber gasket of your radiator cap. A worn cap may cause coolant loss or poor cooling under load—replace it if the seal is cracked or dry.
- Don't Mix Old and New Coolant: Mixing types or brands can cause gel formation or reduced protection.
Final Note
A properly maintained cooling system is key for long engine life and optimum performance from your CRF150F. If you notice persistent overheating, inspect for internal blockage or a faulty water pump after your coolant change. Dial in your next ride with fresh coolant—your Honda is built to perform, so keep it running cool.
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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.