how to check for EVAP system leaks in BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Tools Required:
  • OBD-II scanner
  • Smoke machine
  • Multimeter
  • Basic hand tools (socket set, pliers)
• Safety Warnings:
  • Ensure the vehicle is parked on a level surface and the engine is off before inspection.
  • Disconnect the battery before working on electrical components.

2. Conducting a Smoke Test

• Sub-steps:
  1. Remove the EVAP service port cap if equipped.
  2. Connect the smoke machine to the EVAP service port.
  3. Turn on the smoke machine and allow it to fill the system with smoke.
  4. Monitor for smoke escaping from any component or hose, indicating a leak.
  5. If leaks are found, mark the areas for repair.

3. Inspecting and Replacing Components

• Sub-steps:
  1. Based on the smoke test results, remove any damaged hoses or components.
  2. Replace with OEM or high-quality aftermarket parts to ensure proper fit and function.
  3. Reconnect all components securely, ensuring there are no loose connections.
  4. If the fuel cap was faulty, replace it with a new one that meets specifications.

4. Clearing Codes and Testing

• Sub-steps:
  1. Reconnect the battery if it was disconnected.
  2. Use the OBD-II scanner to clear any stored trouble codes.
  3. Start the engine and allow it to reach operating temperature.
  4. Perform a test drive to see if the check engine light reappears.