how to remove flywheel nut without impact wrench

Removing a flywheel nut without an impact wrench can be done using alternative methods, such as using a breaker bar and securing the flywheel. Here’s how you can remove a flywheel nut without an impact wrench:

Materials you may need:

  1. Breaker bar with a socket that fits the flywheel nut
  2. Flywheel locking tool or flywheel holder (optional but recommended)
  3. A large adjustable wrench or pipe (optional)
  4. Penetrating oil (optional)
  5. Hammer (optional)


  1. Safety Precautions:
    • Ensure the engine is turned off, and the ignition system is disabled to prevent accidental starting. Disconnect the spark plug wire or wires to ensure no electrical power is reaching the engine.
  2. Access the Flywheel Nut:
    • Locate the flywheel nut, which is typically located on the engine’s crankshaft. The flywheel is often found underneath the engine shroud or cover. Remove any covers or guards to access the nut.
  3. Flywheel Locking Tool (Recommended):
    • If you have a flywheel locking tool or flywheel holder, use it to secure the flywheel in place. This tool prevents the flywheel from turning while you loosen the nut.
  4. Apply Penetrating Oil (Optional):
    • If the flywheel nut is stuck or difficult to turn, you can apply penetrating oil to the threads. Allow it to penetrate for a few minutes to help loosen the nut.
  5. Use a Breaker Bar:
    • Insert the socket of the breaker bar onto the flywheel nut.
  6. Apply Force with the Breaker Bar:
    • Apply downward force on the breaker bar’s handle to start loosening the nut. The breaker bar provides additional leverage compared to a standard wrench.
  7. Secure the Flywheel (Alternative Method):
    • If you don’t have a flywheel locking tool, you can use an alternative method to secure the flywheel. Insert a large adjustable wrench or a sturdy metal pipe through the flywheel fins to prevent it from turning. Be careful not to damage the fins.
  8. Apply Steady Force:
    • Apply steady and even force on the breaker bar handle, turning it counterclockwise (left) to loosen the flywheel nut. Be cautious not to apply sudden or excessive force, which can damage the nut or the crankshaft.
  9. Repeat if Necessary:
    • If the nut is tight, you may need to repeat the process, applying additional penetrating oil and gradually increasing the pressure on the breaker bar until the nut begins to turn freely.
  10. Remove the Nut:
    • Once the flywheel nut is loosened, continue turning it counterclockwise until it can be removed by hand. Be careful not to drop the nut into the engine.
  11. Complete Your Task:
    • With the flywheel nut removed, you can now access the components beneath the flywheel or perform any necessary maintenance or repairs.

Remember that flywheel nuts can be tightly secured, so take your time and apply consistent, gradual force to avoid damaging the nut or the engine. Using a breaker bar with the appropriate socket and securing the flywheel is the safest way to remove a flywheel nut without an impact wrench.

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