what does it mean if my Toyota Highlander XU70 (2020-Present) is making ticking noises

Solution

1. Preparation

• Tools Required: OBD-II scanner, mechanic's stethoscope, socket set, torque wrench, engine oil, oil filter.
• Safety Warnings: Disconnect the battery before working on electrical components. Allow engine to cool before inspecting.

2. Change Engine Oil and Filter

1. Lift Vehicle: Use a jack and jack stands to elevate the vehicle safely.
2. Drain Oil: Remove the oil drain plug and allow old oil to fully drain into a suitable container.
3. Replace Oil Filter: Use an oil filter wrench to remove the old oil filter. Apply a small amount of new oil to the rubber gasket of the new filter before installing it.
4. Reinstall Drain Plug: Replace the drain plug and tighten to manufacturer torque specifications (typically around 20-25 ft-lbs).
5. Add New Oil: Pour in the recommended type and amount of engine oil (refer to the owner’s manual for specifications).

3. Inspect and Adjust Valve Clearance

1. Remove Valve Cover: Disconnect any necessary components and remove the valve cover bolts. Carefully lift off the valve cover.
2. Check Clearance: Use a feeler gauge to measure the valve clearance. Refer to the service manual for the correct specifications.
3. Adjust if Needed: If out of spec, adjust the clearance by replacing shims or adjusting rocker arms as applicable.
4. Reinstall Valve Cover: Clean the mating surfaces, apply new gasket material if required, and reinstall the valve cover.

4. Inspect Timing Chain/Belt

1. Remove Components: Depending on the setup, you may need to remove the serpentine belt and other components to access the timing chain or belt cover.
2. Check Tension: Inspect the tensioner and guide components for wear. If they are worn or the chain/belt is loose, replace them.
3. Reassemble: Reinstall all components in reverse order, ensuring all bolts are torqued to specifications.