my Volkswagen Passat B8 (2015-2022) makes a loud noise when I start it

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the vehicle is on a level surface and secure the vehicle with wheel chocks.

2. Check Engine Oil

• Remove the dipstick and wipe it clean.
• Reinsert the dipstick and remove it again to check the oil level.
• If the oil is low or dirty, change the engine oil and filter.
  • Tools Required: Oil filter wrench, socket set, oil catch pan.
  • Parts Required: Engine oil (refer to owner's manual for specifications), oil filter.

3. Inspect and Tighten Serpentine Belt

• Visually inspect the serpentine belt for cracks or signs of wear.
• Use a socket to loosen the tensioner and remove the serpentine belt.
• If damaged, replace the serpentine belt.
  • Tools Required: Socket set, belt tensioner tool.
  • Parts Required: New serpentine belt.

4. Check Engine Mounts

• With the engine running, visually inspect the engine mounts for excessive movement.
• If mounts are worn or damaged, replace them.
  • Tools Required: Socket set, jack stands.
  • Parts Required: New engine mounts.

5. Inspect Timing Belt/Chain

• Remove any necessary covers to access the timing belt or chain.
• Check for proper tension and alignment; if the timing belt is loose, adjust the tension or replace if necessary.
  • Tools Required: Socket set, torque wrench, timing tool kit.
  • Parts Required: Timing belt or chain kit (if replacement is needed).