why does my Volkswagen Passat B8 (2015-2022) engine overheat in traffic

Solution

1. Preparation

• Tools Required: Basic hand tools, coolant recovery tool, OBD-II scanner
• Allow the engine to cool completely before working on the cooling system.
• Disconnect the battery to prevent electrical issues.

2. Coolant Level Check

• Remove the coolant reservoir cap slowly to relieve pressure.
• Inspect the coolant level; it should be between the minimum and maximum marks.
• If low, top off with the appropriate coolant mixture (G12 or G13 for VW).

3. Leak Repair

• Tools Required: Hose clamps, coolant hoses, RTV sealant (if applicable)
• Identify and replace any leaking hoses or components.
• Tighten loose clamps and check for leaks after reassembly.

4. Thermostat Replacement

• Tools Required: Socket set, torque wrench, new thermostat, gasket
• Drain the coolant from the system.
• Remove the housing that contains the thermostat (usually located near the engine).
• Replace the old thermostat with a new one, ensuring correct orientation.
• Reinstall the housing and torque to manufacturer's specifications.

5. Water Pump Inspection

• Tools Required: Torque wrench, replacement water pump (if necessary)
• Inspect the water pump for any signs of leakage or damage.
• If defective, remove the old water pump and install a new one, ensuring proper alignment.
• Torque all fasteners to the specified values.

6. Radiator Fan Test and Repair

• Reconnect the battery and start the engine.
• Turn on the A/C to check if the radiator fan engages.
• If the fan does not operate, replace the fan motor or check the relay and wiring.