why does my BMW X3 G01 (2018-2024) engine make a knocking noise

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid any electrical issues.
• Allow the engine to cool down if it has been running.

2. Oil Change (if oil level is low or dirty)

• Sub-steps:
  • Place a drain pan under the oil pan.
  • Remove the oil drain plug and allow oil to drain completely.
  • Replace the oil filter using an oil filter wrench.
  • Install a new oil filter and tighten it to the manufacturer's specification.
  • Reinstall the drain plug and tighten it to the recommended torque.
  • Refill the engine with the correct type and amount of engine oil.

3. Inspect and Replace Damaged Components

• Sub-steps:
  • Remove any engine covers to access components.
  • Inspect the timing chain/belt for wear; replace if necessary.
  • Check piston and rod bearings for damage; if worn, replace them.
  • Reassemble any removed components and covers, ensuring all bolts are tightened to specification.

4. Test Engine Operation

• Reconnect the battery.
• Start the engine and listen for the knocking noise.
• Ensure that the engine runs smoothly without any unusual sounds.