how to fix a leaky radiator in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the battery to prevent electrical shorts.
• Drain the coolant from the system by opening the drain valve at the bottom of the radiator into a suitable container.

2. Remove the Radiator

• Tools Required: Socket set, screwdriver, pliers
• Loosen and remove the upper and lower radiator hoses using pliers or a hose clamp tool.
• Unscrew the mounting bolts securing the radiator to the support brackets.
• Disconnect any electrical connectors for the cooling fan or temperature sensor.
• Carefully lift the radiator out of the engine bay, ensuring no damage to surrounding components.

3. Inspect and Repair the Radiator

• Check for visible cracks, holes, or corrosion on the radiator.
• If the damage is minor (such as a small hole), apply a radiator repair epoxy following the manufacturer's instructions.
• For significant damage, consider replacing the radiator.

4. Install the New or Repaired Radiator

• Place the new or repaired radiator back into its mounting position.
• Reattach the mounting bolts and tighten them to the manufacturer’s torque specifications.
• Reconnect the upper and lower radiator hoses, ensuring they are secured with hose clamps.

5. Refill the Cooling System

• Refill the radiator with the appropriate type of coolant as specified in the owner’s manual.
• Start the engine and allow it to reach operating temperature while checking for leaks.
• Top off the coolant reservoir to the proper level.