DIY Engine Overhaul: Step-by-Step Guide on How to Turn Crankshaft with Breaker Bar

Turning a crankshaft with a breaker bar is a common task that may be required for various automotive repairs and maintenance procedures. This guide will provide a comprehensive overview of the tools, safety precautions, and step-by-step instructions for safely and effectively turning a crankshaft using a breaker bar.

Tools and Materials Required

• Breaker bar
• Socket wrench
• Socket that fits the crankshaft bolt
• Gloves
• Safety glasses

Safety Precautions

• Wear gloves and safety glasses to protect yourself from potential injuries.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the battery to prevent any electrical hazards.

Step-by-Step Instructions

1. Locate the Crankshaft Bolt

Identify the crankshaft bolt, which is typically located at the front of the engine. It is usually a large bolt that protrudes from the crankshaft pulley.

2. Attach the Socket

Attach the appropriate socket to the breaker bar. The socket size will depend on the size of the crankshaft bolt.

3. Engage the Breaker Bar

Position the socket over the crankshaft bolt and engage the breaker bar. Ensure the breaker bar is securely fastened to the socket.

4. Turn the Crankshaft

Slowly and carefully turn the breaker bar in the direction that corresponds to the desired rotation of the crankshaft. Note that the crankshaft may be difficult to turn, so use gradual force.

5. Use Proper Leverage

Apply leverage to the breaker bar by using your body weight. Stand on the breaker bar and push or pull with your legs. Avoid using excessive force or sudden movements.

6. Rotate the Crankshaft

Continue turning the crankshaft until it reaches the desired position. The number of turns required will vary depending on the specific repair or maintenance procedure.

7. Remove the Breaker Bar

Once the crankshaft is in the correct position, remove the breaker bar and socket.

Troubleshooting

Crankshaft Won’t Turn

• Ensure the breaker bar is properly engaged with the socket.
• Check if the crankshaft bolt is seized or rusted.
• Apply penetrating oil to the bolt and let it sit for a few minutes before attempting to turn the crankshaft.
• Use a larger breaker bar or a ratchet wrench for additional leverage.

Breaker Bar Bends or Breaks

• Do not use excessive force.
• Ensure the breaker bar is rated for the torque required.
• Use a shorter breaker bar or a cheater pipe for increased strength.

Tips

• Use a long breaker bar for maximum leverage.
• Position the breaker bar at a 90-degree angle to the crankshaft bolt.
• Apply steady and gradual force to avoid damaging the crankshaft or breaker bar.
• If the crankshaft is particularly difficult to turn, use a penetrating oil or a hydraulic breaker bar.

Wrapping Up

Turning a crankshaft with a breaker bar is a straightforward task that can be performed with the right tools and safety precautions. By following these instructions and troubleshooting tips, you can safely and effectively rotate the crankshaft for various automotive repairs and maintenance procedures.

Frequently Asked Questions

Q: What is the purpose of turning a crankshaft with a breaker bar?
A: Turning a crankshaft is necessary for various automotive repairs, such as replacing timing belts, adjusting valve timing, and performing engine overhauls.

Q: Can I use a regular wrench instead of a breaker bar?
A: No, a regular wrench is not recommended for turning a crankshaft. A breaker bar is designed to provide greater leverage and withstand higher torque.

Q: What if the crankshaft bolt is seized?
A: If the crankshaft bolt is seized, apply penetrating oil and let it sit for a few minutes. Use a larger breaker bar or a ratchet wrench for additional leverage.