how to diagnose overheating issues in my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

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

2. Coolant Replacement

1. Drain Coolant: Place a drain pan under the radiator and open the drain valve to release old coolant.
2. Flush System: Use a cooling system flush to remove any debris and contaminants.
3. Refill with New Coolant: Mix the appropriate Volkswagen-approved coolant with distilled water (50:50 ratio) and refill the system.

3. Replace Thermostat (if faulty)

1. Remove Thermostat Housing: Disconnect hoses and remove the screws holding the thermostat housing in place.
2. Install New Thermostat: Place the new thermostat into the housing, ensuring the orientation matches the old one.
3. Reattach Housing: Secure the thermostat housing back in place and tighten to manufacturer's torque specifications.

4. Replace Water Pump (if faulty)

1. Remove Drive Belt: Using a socket wrench, relieve tension on the drive belt and remove it.
2. Detach Water Pump: Remove bolts securing the water pump and carefully detach it from the engine.
3. Install New Water Pump: Position the new water pump and secure it with bolts to the specified torque.
4. Reinstall Drive Belt: Put the drive belt back on, ensuring proper alignment.

5. Check and Replace Cooling Fan (if necessary)

1. Remove Fan Assembly: Disconnect electrical connectors and unbolt the fan assembly from the radiator.
2. Install New Cooling Fan: Position the new fan assembly, secure it with bolts, and reconnect the electrical connectors.