what causes high oil consumption in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

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

2. Inspect and Replace PCV Valve

• Locate the PCV valve on the engine.
• Remove the PCV valve by unscrewing or unclipping it from its housing.
• Inspect the old PCV valve for blockage or damage.
• Install a new PCV valve, ensuring it fits securely.
• Reconnect any hoses or clips removed during the process.

3. Perform an Engine Compression Test

• Remove the spark plugs using a spark plug socket.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Repeat for all cylinders. Compare readings to manufacturer specifications.
• If any cylinder shows significantly lower compression, consider further inspection of piston rings or valves.

4. Address Oil Leaks

• Clean the engine area to identify the source of any leaks.
• Replace any worn or damaged gaskets, seals, or O-rings as needed.
• Use a torque wrench to ensure proper torque specifications on components to prevent leaks.

5. Monitor Oil Consumption

• After repairs, keep a log of oil levels over a set period to monitor consumption.
• If consumption remains high, further internal engine inspection may be warranted.