my Volkswagen Tiguan First Generation (2007-2018) has excessive oil consumption, why?

Solution

1. Preparation

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

2. Inspect and Replace PCV System

• Tools Required: Screwdriver set, pliers, replacement PCV valve.
• Remove the engine cover (if applicable) by loosening bolts or clips.
• Locate the PCV valve and hoses; check for cracks or blockages.
• Disconnect the PCV hose and remove the valve.
• Install the new PCV valve and reconnect the hoses securely.

3. Address Engine Oil Leaks

• Tools Required: Oil catch pan, wrench set, replacement gaskets or seals.
• Place an oil catch pan under the engine.
• Inspect and tighten any loose bolts on the oil pan and valve cover.
• Replace any damaged gaskets or seals to prevent oil leaks.

4. Repair or Replace Engine Components

• Tools Required: Torque wrench, socket set, engine oil.
• If compression or leak-down tests indicated issues:
  • Remove the cylinder head or oil pan as needed.
  • Inspect piston rings, valve seals, and head gasket.
  • Replace worn components (piston rings, valve seals) as necessary.
  • Reassemble engine components, ensuring proper torque specifications.

5. Refill Engine Oil

• Tools Required: Funnel, oil measuring tool.
• After repairs, refill the engine with the manufacturer-recommended oil type and capacity.
• Run the engine for a few minutes and check for leaks.