how to fix oil leak in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Tools Required: Socket set, torque wrench, oil catch pan, engine degreaser, UV dye (if necessary)
• Ensure the vehicle is on a level surface and secure it with wheel chocks.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Identify the Source of the Leak

• Sub-steps:
  • Use the engine degreaser to clean any visible oil residue from the engine.
  • Run the engine for a few minutes and then turn it off.
  • Inspect the cleaned areas for fresh oil, indicating the leak source.

3. Replace Gaskets or Seals

• Sub-steps:
  • If the leak is from the oil pan, remove the oil drain plug and drain the oil into the catch pan.
  • Remove the oil pan bolts using the socket set and carefully detach the oil pan.
  • Clean the mating surfaces of the oil pan and engine block.
  • Replace the oil pan gasket with a new one, ensuring proper alignment.
  • Reinstall the oil pan and torque the bolts to the manufacturer's specifications (typically around 10-15 ft-lbs).
  • If the valve cover gasket is leaking, remove the valve cover bolts and lift the cover off.
  • Replace the valve cover gasket and reassemble, torquing the bolts to the specified value (usually around 7-9 ft-lbs).

4. Refill Oil

• Sub-steps:
  • Reinstall the oil drain plug and refill the engine with the appropriate type and amount of oil as per the owner's manual (generally 0W-20 synthetic oil).
  • Reconnect the negative battery terminal.