my Volkswagen Tiguan makes a knocking noise when starting, what could it be?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Secure Battery Connections

• Sub-steps:
  1. Remove the terminal bolts from the battery using a socket set.
  2. Clean the battery terminals and cable ends with a wire brush.
  3. Reattach the battery cables securely, ensuring a tight fit.

3. Change Engine Oil and Filter (if necessary)

• Tools Required: Oil filter wrench, socket set, drain pan, funnel.
• Sub-steps:
  1. Place a drain pan under the oil pan and remove the drain plug to drain old oil.
  2. Replace the drain plug once the oil has fully drained.
  3. Remove the old oil filter using an oil filter wrench.
  4. Install the new oil filter, ensuring a proper seal.
  5. Pour new engine oil into the engine using a funnel (refer to the owner’s manual for the correct oil type and quantity).

4. Inspect and Replace Starter Motor (if faulty)

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Disconnect the battery again for safety.
  2. Remove any components obstructing access to the starter motor (e.g., air intake duct).
  3. Unplug the electrical connectors from the starter motor.
  4. Remove the mounting bolts securing the starter motor to the engine.
  5. Replace the starter motor with a new one, securing it with the bolts to the manufacturer’s torque specifications.
  6. Reconnect the electrical connectors and any removed components.