why does my Volkswagen Golf Eighth Generation (2020-present) engine sound like it's knocking

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, and a multimeter.
• Ensure the vehicle is on a flat surface with the parking brake engaged.
• Disconnect the battery before working on any electrical components.

2. Change Engine Oil

1. Drain Old Oil
   • Position an oil drain pan under the oil pan.
   • Remove the oil drain plug using the socket set and let oil drain completely.
2. Replace Oil Filter
   • Locate the oil filter; use an oil filter wrench to remove it.
   • Apply a small amount of new oil to the gasket of the new filter and install it.
3. Add New Oil
   • Replace the drain plug and torque it to the manufacturer’s specifications (usually around 20-30 ft-lbs).
   • Use the correct grade of oil (typically 0W-20 or 5W-30, check owner’s manual) and fill the engine.

3. Replace Spark Plugs

1. Remove Ignition Coils
   • Disconnect the electrical connectors from each ignition coil.
   • Remove the bolts securing the coils and pull them out.
2. Replace Spark Plugs
   • Use a spark plug socket to remove the old plugs.
   • Check gap specifications; adjust if necessary.
   • Install new plugs using a torque wrench, typically around 15-20 ft-lbs.
3. Reinstall Ignition Coils
   • Place coils back in position and secure with bolts. Reconnect electrical connectors.

4. Fuel Quality Check

1. Fuel System Clean
   • If poor fuel quality is suspected, consider using a fuel system cleaner.
   • Follow the product instructions for application through the fuel tank.
2. Refuel with High Octane Gasoline
   • Ensure to fill with fuel of the recommended octane rating as specified in the owner's manual.