how to diagnose engine noise in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid any electrical shorts.

2. Change Engine Oil and Filter

• Sub-steps:
  1. Drain the old engine oil using a wrench to remove the oil pan drain plug.
  2. Replace the oil filter using an oil filter wrench.
  3. Install a new oil filter and ensure it is properly tightened.
  4. Reinstall the drain plug and torque it to the manufacturer's specifications (typically around 30 Nm).
  5. Refill the engine with the appropriate type of oil (e.g., 5W-30 synthetic) as specified in the owner’s manual.

3. Replace Accessory Belts

• Sub-steps:
  1. Remove any engine covers if necessary to access the belts.
  2. Release tension on the belt tensioner using a suitable tool.
  3. Remove the old belts and inspect the pulleys for wear.
  4. Install new belts, ensuring proper alignment on pulleys.
  5. Reapply tension to the tensioner and verify the belts are secure.

4. Repair or Replace Faulty Components

• Sub-steps:
  1. Identify any malfunctioning components from the diagnostic steps (e.g., timing chain, valve lifters).
  2. If a timing chain issue is identified, follow the manufacturer’s procedure to remove and replace the timing chain.
  3. For internal engine problems (if compression test indicates issues), disassemble the engine as necessary and replace damaged parts such as piston rings or valves.

5. Reassemble and Test

• Reattach any components removed for access.
• Reconnect the battery.
• Start the engine and listen for noise.