why is my Volkswagen Golf MK7.5 (2020-Present) engine overheating in traffic

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electric shock during repairs.

2. Inspect and Replace Coolant

• Sub-steps:
  1. Remove the coolant reservoir cap carefully to relieve pressure.
  2. Drain the old coolant from the radiator by opening the drain valve or removing the lower radiator hose.
  3. Flush the system with distilled water to remove any debris or old coolant.
  4. Refill with the recommended coolant mixture (usually a 50/50 mix of antifreeze and distilled water).
• Tools Required: Coolant funnel, drain pan.
• Safety Warnings: Use gloves and eye protection when handling coolant; it is toxic.

3. Replace the Thermostat

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the thermostat housing and remove the bolts securing it.
  3. Take out the old thermostat and clean the mating surfaces.
  4. Install the new thermostat, ensuring it is oriented correctly.
  5. Reattach the thermostat housing and torque the bolts to the manufacturer’s specifications.
• Tools Required: Socket set, torque wrench.
• Safety Warnings: Allow the engine to cool completely before working on the cooling system.

4. Test the Radiator Fan

• Sub-steps:
  1. Start the engine and let it reach operating temperature.
  2. Check if the radiator fan activates when the temperature gauge rises.
  3. If not, test the fan motor and relay with a multimeter for continuity.
  4. Replace any faulty components as necessary.
• Tools Required: Multimeter.
• Safety Warnings: Ensure the engine is running in a safe environment to test fan operation.