my Volkswagen Passat B8 (2015-2022) is overheating in traffic what could be wrong

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the engine is cool before starting any work.
• Disconnect the battery to prevent electrical shock.

2. Coolant Leak Repair

1. If coolant is low, refill it with the appropriate coolant mixture based on manufacturer specifications.
2. Identify and replace any damaged hoses or seals using a socket set.
   • Tools Required: Socket set, pliers, coolant funnel.
   • Safety Warnings: Wear gloves and goggles, as coolant can be hazardous.

3. Thermostat Replacement

1. Drain the coolant from the radiator to below the thermostat level.
2. Remove the thermostat housing using a socket set.
3. Replace the old thermostat with a new one, ensuring the gasket is correctly positioned.
4. Reinstall the thermostat housing and torque to manufacturer specifications.
   • Tools Required: Torque wrench, socket set, coolant funnel.

4. Radiator Fan Inspection

1. Check the fan relay and fuses to ensure they are functioning correctly.
2. If the fan is not operating, replace the fan motor or relay as needed.
   • Tools Required: Multimeter, socket set.

5. System Flush and Refill

1. Flush the entire cooling system with a radiator flush solution.
2. Refill the cooling system with the correct coolant mixture.
3. Bleed the cooling system to remove any trapped air by running the engine with the radiator cap off until the thermostat opens.