Bmw Injektor ausbauen / Anleitung / Injektor defekt / Probleme / Injector Removal

Introduction

This tutorial guides you through the step-by-step process of removing injectors from BMW models E90, E91, E46, E39, E60, and E61. Whether you're dealing with a defective injector or simply performing maintenance, this guide will provide you with practical tips and techniques to make the job easier.

Step 1: Prepare Your Workspace

• Ensure you have a clean, well-lit area to work.
• Gather necessary tools, including:
  • Socket set
  • Torque wrench
  • Screwdrivers
  • Pliers
  • Injector puller (if available)

Step 2: Disconnect the Battery

• Locate the battery in your BMW and disconnect the negative terminal. This prevents any electrical shorts or accidents while working on the engine.

Step 3: Remove Engine Covers

• If your model has engine covers, remove them using the appropriate tools.
• Keep track of screws and fasteners for reassembly.

Step 4: Access the Fuel Rail

• Locate the fuel rail where the injectors are mounted.
• Carefully disconnect any electrical connectors from the injectors. Use a flathead screwdriver if necessary to pry them off gently.

Step 5: Relieve Fuel Pressure

• To avoid fuel spray, relieve pressure in the fuel system:
  • Locate the fuel pump fuse and remove it.
  • Start the engine and let it run until it stalls, indicating that the fuel pressure is relieved.

Step 6: Remove the Fuel Rail

• Unscrew the bolts securing the fuel rail to the engine.
• Gently pull the rail away from the injectors. Be cautious of any remaining fuel in the rail.

Step 7: Extract the Injectors

• Use an injector puller if available, or carefully twist and pull the injectors out of their seats.
• Inspect the O-rings for damage; replace them if necessary during reinstallation.

Step 8: Clean the Injector Seats

• Before installing new injectors, clean the injector seats in the intake manifold to ensure a proper seal.
• Use a clean cloth or brush to remove any debris or old sealant.

Step 9: Install New Injectors

• Apply a small amount of engine oil to the O-rings of the new injectors to help with installation.
• Insert the new injectors into their respective seats, ensuring they are seated firmly.

Step 10: Reassemble Fuel Rail and Components

• Reattach the fuel rail to the injectors and secure it with bolts.
• Reconnect the electrical connectors to the injectors.

Step 11: Reconnect the Battery

• Reconnect the negative terminal of the battery, ensuring a secure connection.

Step 12: Test the System

• Turn the ignition to the "ON" position without starting the engine to allow the fuel pump to prime the system.
• Check for any fuel leaks around the injectors and fuel rail.

Conclusion

You have now successfully removed and replaced the injectors on your BMW. Regular maintenance of injectors can improve engine performance and fuel efficiency. If you face issues during reinstallation or if the problem persists, consider consulting a professional mechanic. Happy driving!