my Volkswagen Golf MK7 (2015-2019) is overheating what could be wrong

Solution

1. Preparation

• Ensure the engine is cool and the vehicle is parked on a level surface.
• Gather necessary tools and parts.

2. Coolant Level Check and Top-Up

• Open the hood and locate the coolant reservoir.
• Remove the cap carefully to avoid pressure release.
• If the coolant is low, top it up with the manufacturer-recommended coolant type.

3. Inspect and Replace the Thermostat (if faulty)

• Tools Required: Socket set, torque wrench, gasket scraper.
• Sub-steps:
  1. Drain the coolant from the radiator into a clean container.
  2. Disconnect the negative battery terminal.
  3. Remove the engine cover if necessary.
  4. Locate the thermostat housing and remove the mounting bolts.
  5. Carefully take out the thermostat and inspect for proper operation.
  6. Replace with a new thermostat, using a new gasket. Torque the bolts to the manufacturer specification (usually around 10 Nm).
  7. Refill the cooling system with the appropriate coolant.

4. Inspect and Replace the Water Pump (if faulty)

• Tools Required: Socket set, screwdriver set, coolant catch pan.
• Sub-steps:
  1. Drain the coolant from the cooling system.
  2. Disconnect the negative battery terminal.
  3. Remove any components obstructing access to the water pump (such as belts or brackets).
  4. Unbolt the water pump and remove it from the engine block.
  5. Clean the mounting surface thoroughly before installing the new pump.
  6. Install the new water pump and torque the bolts as specified (around 25 Nm).
  7. Reconnect any components removed and refill the cooling system with coolant.

5. Inspect Radiator and Hoses

• Tools Required: Visual inspection tools (flashlight).
• Sub-steps:
  1. Check all hoses for cracks, leaks, or bulges.
  2. Inspect the radiator for any damage or blockages.
  3. If any hoses or the radiator are damaged, replace them as necessary.