how to address engine knocking sounds in my Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather tools and necessary parts.
• Disconnect the battery to ensure safety during repairs.
• Allow the engine to cool completely before starting the work.

2. Engine Oil Change

1. Drain Old Oil

   • Place an oil catch pan under the oil pan.
   • Remove the oil drain plug using a socket wrench and allow the old oil to completely drain.
   • Replace the drain plug and torque it to the manufacturer's specifications (usually around 20-25 Nm).

2. Replace Oil Filter

   • Locate the oil filter and use an oil filter wrench to remove it.
   • Lubricate the rubber O-ring of the new oil filter with fresh oil.
   • Install the new filter by hand, tightening it to specification (usually hand-tight plus 3/4 turn).

3. Refill Engine Oil

   • Open the hood and remove the oil filler cap.
   • Pour in the recommended grade of engine oil (usually 5W-30).
   • Start the engine and let it run for a few minutes, then check the oil level using the dipstick.

3. Inspect and Replace Components

1. Inspect Spark Plugs

   • Remove the ignition coils or spark plug wires.
   • Extract the spark plugs and inspect for wear or deposits.
   • Replace with OEM or equivalent spark plugs if necessary.

2. Check Engine Mounts

   • Visually inspect engine mounts for cracks or wear.
   • Replace any damaged mounts to reduce engine vibrations.

3. Examine Fuel Injectors

   • Use a fuel pressure gauge to check for proper fuel pressure.
   • Clean or replace fuel injectors if they are clogged or malfunctioning.