my Skoda Octavia NFL (2020-Present) overheats during long drives, what should I check?

Solution

1. Preparation

• Tools Required: Socket set, coolant pressure tester, OBD-II scanner.
• Ensure the engine is cool before proceeding to avoid burns from hot components.
• Disconnect the battery to prevent any electrical issues during repairs.

2. Check Coolant Level and Condition

• Remove the coolant reservoir cap.
• Inspect the coolant level; it should be between the minimum and maximum marks.
• If low, top up with appropriate coolant (check owner’s manual for specifications).
• Inspect coolant for discoloration or contaminants. If contaminated, a complete flush may be necessary.

3. Inspect Radiator

• Tools Required: Socket set, flashlight.
• Visually inspect the radiator for any debris, bent fins, or leaks.
• If necessary, clean the radiator with compressed air or a soft brush.
• Check for any signs of coolant pooling under the vehicle.

4. Test Thermostat

• Locate the thermostat housing and remove it.
• Tools Required: Socket set, gasket scraper.
• Place the thermostat in a pot of water and heat it; it should open at its specified temperature. If it does not open or sticks, replace it.

5. Examine Water Pump

• Inspect the water pump for leaks or unusual noises.
• Tools Required: Socket set, torque wrench.
• If the water pump is faulty, drain the coolant and replace it, ensuring to torque the bolts to manufacturer specifications.

6. Check Cooling Fan Operation

• Start the engine and let it reach operating temperature.
• Observe the cooling fan; it should activate when the engine reaches a certain temperature.
• If the fan does not operate, check the fan relay and fuses. If faulty, replace them, or replace the fan if necessary.