my BMW 5 Series F10/F11 (2010-2017) has excessive smoke from the exhaust

Solution

1. Preparation

• Tools Required: Oil catch pan, socket set, torque wrench, compression tester, OBD-II scanner.
• Ensure the engine is cool and parked on a level surface.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace PCV Valve

• Sub-steps:
  1. Locate the PCV valve (usually near the intake manifold).
  2. Disconnect any hoses attached to the PCV valve.
  3. Remove the old PCV valve and inspect for clogging or damage.
  4. Install the new PCV valve (ensure it fits snugly).
  5. Reconnect all hoses securely.

3. Repair or Replace Worn Engine Components

• Sub-steps:
  1. If compression test results are low, remove the engine's valve cover.
  2. Inspect the piston rings and cylinder walls for wear and damage.
  3. Replace any damaged piston rings or recondition cylinder walls as necessary.
  4. Reassemble the engine components using the manufacturer's torque specifications.
  5. Replace any gaskets or seals that were disturbed during the process.

4. Change Engine Oil and Filter

• Sub-steps:
  1. Drain old engine oil using an oil catch pan.
  2. Replace the oil filter with a new one.
  3. Fill the engine with the appropriate type and amount of engine oil (refer to owner's manual).
  4. Start the engine and check for leaks.