why does my Volkswagen Golf MK7 (2015-2019) make a knocking noise when starting?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical issues.

2. Oil Inspection and Change (if necessary)

• Sub-steps:
  1. Remove the engine oil dipstick and check the oil level.
  2. If low, add the appropriate oil type specified in the owner’s manual.
  3. If oil is dirty or old, drain the oil using a drain pan.
  4. Replace the oil filter with a new one.
  5. Refill the engine with the recommended oil quantity and type.

Tools Required:

• Oil filter wrench
• Socket set
• Drain pan
• Funnel

3. Inspect and Replace Engine Mounts (if needed)

• Sub-steps:
  1. Visually inspect engine mounts for cracks or separation.
  2. If damaged, lift the engine slightly using a jack and a wood block for support.
  3. Remove the bolts securing the damaged mount.
  4. Install the new engine mount and torque bolts to manufacturer specifications.

Tools Required:

• Jack and jack stands
• Socket set
• Torque wrench

4. Timing Chain/Belt Inspection and Adjustment (if applicable)

• Sub-steps:
  1. Remove any components obstructing access to the timing cover.
  2. Inspect the timing chain/belt for wear or slack.
  3. If the tensioner is faulty, replace it and ensure proper tension is applied.

Tools Required:

• Timing tool kit (if applicable)
• Socket set
• Torque wrench

5. Starter and Flywheel Check

• Sub-steps:
  1. Remove the starter motor from its mounting.
  2. Inspect the flywheel for missing teeth or damage.
  3. If the flywheel is damaged, it may require replacement.

Tools Required:

• Socket set
• Wrench set