my Skoda Octavia NFL (2020-Present) has coolant leaking from under the car

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting the repair.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Locate the Leak

• Visually inspect the area where the coolant is pooling.
• Use a flashlight to look for cracks or wet spots on hoses, the radiator, and the water pump.

3. Replace Damaged Components

A. Hoses

• Tools Required: Hose clamp pliers, socket set.
• Sub-steps:
  1. Remove the clamps securing the damaged hose.
  2. Slide the hose off the connection points.
  3. Install the new hose and secure it with clamps, ensuring they are tight (typically 10 Nm torque).

B. Water Pump

• Tools Required: Socket set, torque wrench, flathead screwdriver.
• Sub-steps:
  1. Drain the coolant by opening the drain valve or removing the lower radiator hose.
  2. Remove the drive belt from the water pump pulley.
  3. Unbolt the water pump using the socket set and remove it from the engine.
  4. Clean the gasket surface on the engine block.
  5. Install the new water pump, ensuring proper alignment. Torque the bolts to 25 Nm.
  6. Reinstall the drive belt.

C. Radiator

• Tools Required: Socket set, screwdriver, coolant funnel.
• Sub-steps:
  1. Drain the coolant from the radiator.
  2. Remove the upper and lower hose connections from the radiator.
  3. Unbolt and remove the radiator from the vehicle.
  4. Install the new radiator, ensuring it is secured properly.
  5. Reconnect the hoses and fill the cooling system with new coolant.

4. Refill and Bleed the Cooling System

• Tools Required: Coolant funnel.
• Sub-steps:
  1. Fill the cooling system with the manufacturer-recommended coolant.
  2. Start the engine and allow it to run until it reaches operating temperature, keeping an eye on the coolant level.
  3. Open the bleed valve (if applicable) to remove any air pockets.
  4. Close the bleed valve once coolant flows steadily without bubbles.