my Skoda Octavia NFL (2020-Present) has a high-pitched squeal when starting

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Serpentine Belt

1. Remove the Belt:
   • Locate the serpentine belt tensioner and use a socket wrench to relieve tension.
   • Carefully slide the belt off the pulleys.
2. Inspect the Belt:
   • Check for cracks, fraying, or glazing.
   • If damaged, proceed to replace it.
3. Install New Belt:
   • Route the new serpentine belt according to the belt routing diagram (usually located on the radiator support or engine compartment).
   • Ensure it is seated properly on all pulleys.

3. Inspect and Replace Tensioner and Idler Pulleys

1. Remove the Tensioner:
   • Take note of the orientation and position of the tensioner.
   • Remove bolts securing the tensioner with a socket set.
   • Replace with a new tensioner, ensuring proper alignment.
2. Inspect Idler Pulley:
   • Check the idler pulley for play and smooth operation.
   • If faulty, remove the idler pulley using appropriate tools and replace it.

4. Verify Alternator Function

1. Reconnect the Battery:
   • Reconnect the negative battery terminal.
2. Check Voltage Output:
   • Start the engine and measure the voltage at the battery terminals.
   • It should read between 13.8 to 14.5 volts; if not, consider replacing the alternator.