my BMW 5 Series G30/G31 (2017-2024) is overheating what should I check

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting work.
• Disconnect the vehicle’s battery to prevent electrical issues.

2. Check and Refill Coolant

• Locate the coolant reservoir and remove the cap.
• Inspect the coolant level and add the appropriate coolant mixture (50/50 water and antifreeze) if low.
• Recheck for leaks after refilling.

3. Inspect and Replace Thermostat (if faulty)

• Tools Required: Socket set, torque wrench, screwdriver, coolant catch pan
• Locate the thermostat housing and remove the necessary components to access it.
• Remove the thermostat and inspect for proper operation or blockage.
• Replace with a new thermostat, ensuring the correct orientation.
• Torque the bolts to manufacturer's specifications (typically around 10-15 Nm).
• Refill the cooling system with coolant.

4. Replace Water Pump (if faulty)

• Tools Required: Socket set, torque wrench, coolant catch pan
• Drain the coolant into a pan.
• Remove the serpentine belt and any components obstructing access to the water pump.
• Unbolt and remove the old water pump.
• Install the new water pump, ensuring the gasket is properly seated.
• Torque the water pump bolts to manufacturer's specifications.
• Reconnect the serpentine belt and refill the cooling system.

5. Inspect and Clean Radiator

• Tools Required: Hose, radiator cleaning solution, soft brush
• Check the radiator for external debris and blockage.
• Use a hose to flush out any internal blockages or debris.
• If necessary, use a radiator cleaning solution to remove scale buildup and flush thoroughly.
• Ensure all connections are secure and no leaks are present.