why is my BMW 5 Series F10/F11 (2010-2017) making a loud noise when starting

Solution

1. Preparation

• Gather tools and parts before beginning the repair.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Replace Engine Oil

• Sub-steps:

  1. Remove the oil filler cap and check the oil level with the dipstick.
  2. If low, drain the old oil using an oil catch pan and replace it with manufacturer-recommended oil.
  3. Replace the oil filter to ensure clean oil circulation.

• Tools Required:

  • Socket set
  • Oil filter wrench
  • Oil catch pan
  • Funnel

3. Check and Replace Timing Chain/Belt (if necessary)

• Sub-steps:

  1. Remove any necessary covers to access the timing chain/belt.
  2. Inspect for signs of wear, such as fraying or cracking.
  3. If damaged, remove the old timing chain/belt and install a new one, ensuring proper alignment.
  4. Reinstall any covers removed during the inspection.

• Tools Required:

  • Torque wrench
  • Socket set
  • Timing tool kit (if applicable)

4. Inspect and Replace Starter Motor (if necessary)

• Sub-steps:

  1. Disconnect the battery and remove the electrical connections from the starter motor.
  2. Unmount the starter motor from its housing.
  3. Install the new starter motor and reconnect the electrical connections.
  4. Reconnect the battery and test the new starter.

• Tools Required:

  • Socket set
  • Torque wrench