how to know when to replace timing belt on Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather tools and parts required for the replacement.
• Disconnect the battery to avoid electrical shocks.
• Allow the engine to cool down completely.

2. Remove Engine Covers

• Use a socket set to remove any plastic engine covers that may obstruct access to the timing belt.
• Keep all fasteners organized for reinstallation.

3. Remove the Old Timing Belt

• Drain Engine Coolant: Use a coolant drain pan to catch coolant from the radiator.
• Remove the Serpentine Belt: Use a wrench to relieve tension on the serpentine belt tensioner and slide the belt off.
• Remove Timing Belt Covers: Unbolt and remove the timing belt covers to access the timing belt.
• Align Timing Marks: Rotate the crankshaft to align timing marks on the camshaft and crankshaft pulleys.
• Loosen Tensioner: Release tension on the timing belt tensioner and remove the old timing belt.

4. Install New Timing Belt

• Install New Timing Belt: Place the new timing belt around the crankshaft and camshaft pulleys, ensuring the timing marks remain aligned.
• Adjust Tension: Reinstall the tensioner and ensure proper tension according to manufacturer specifications.
• Reinstall Timing Belt Covers: Put back the timing belt covers and ensure they are securely fastened.
• Reinstall Serpentine Belt: Reinstall the serpentine belt and ensure it is properly aligned on all pulleys.

5. Refill Fluids and Test

• Refill Engine Coolant: Pour new coolant into the radiator and check for leaks.
• Reconnect Battery: Reconnect the battery terminals.
• Start the Engine: Start the engine and listen for any unusual noises. Check for leaks and ensure the timing belt operates smoothly.