why does my BMW 3 Series F30/F31 (2012-2019) smell like burning oil

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Replace Gaskets/Seals

• Inspect Gaskets:
  • Remove engine covers or components obstructing access to the valve cover and oil pan.
  • Visually examine gaskets for wear or damage.
• Replace Gaskets:
  • Remove the old gasket with a scraper, ensuring the surface is clean.
  • Apply a thin layer of gasket maker if required, or place the new gasket in position.
  • Reinstall the valve cover or oil pan and torque to manufacturer's specifications (typically around 10-15 Nm for valve covers).

3. Repair Leaks from Oil Filter or Drain Plug

• Oil Filter:
  • Remove the oil filter using an oil filter wrench.
  • Inspect the rubber O-ring on the filter for damage and replace if necessary.
  • Apply a small amount of clean oil to the new filter O-ring and install it securely.
• Oil Drain Plug:
  • Inspect the drain plug for wear and replace the washer if damaged.
  • Reinstall the drain plug and tighten to the manufacturer's torque specifications (typically around 25 Nm).

4. Clean Up Residual Oil

• Use a degreaser to clean any residual oil in the engine bay.
• Rinse with water and allow the area to dry completely.