my Volkswagen Tiguan makes a knocking noise at start up what could be wrong

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 negative battery terminal to ensure safety during repairs.

2. Engine Oil Inspection and Change

• Sub-steps:
  1. Remove the oil dipstick and check the oil level; add oil if low.
  2. If oil is dirty or old, drain the existing oil using a wrench to remove the oil pan plug.
  3. Replace the oil filter using an oil filter wrench.
  4. Refill the engine with the manufacturer-recommended oil type and quantity.
• Tools Required: Oil filter wrench, socket set, oil funnel, oil catch pan.
• Safety Warnings: Allow engine to cool before performing oil changes to prevent burns.

3. Inspect and Replace Engine Mounts

• Sub-steps:
  1. Remove any components obstructing access to the engine mounts (if necessary).
  2. Use a jack to support the engine from below.
  3. Remove the bolts securing the engine mounts to the engine and the subframe.
  4. Replace any worn or damaged mounts with new ones and tighten to manufacturer specifications.
• Tools Required: Socket set, torque wrench, jack and jack stands.
• Safety Warnings: Ensure the vehicle is securely supported before working underneath it.

4. Check Timing Chain/Belt Tensioner

• Sub-steps:
  1. Remove any covers obstructing access to the timing chain or belt.
  2. Inspect the tensioner for proper functionality and wear.
  3. If the tensioner is loose or damaged, replace it as per manufacturer specifications.
• Tools Required: Socket set, torque wrench, timing tool kit (if applicable).
• Safety Warnings: Disconnect the battery before working on the timing components.