my BMW X3 G01 (2018-2024) is leaking coolant what's the cause

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the engine is cool and the vehicle is parked on a level surface.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Hoses

• Inspect hoses: Check all hoses connected to the cooling system for cracks or damage.
• Replace damaged hoses: If any hoses are found to be defective, remove the clamps and hoses using a socket set. Install new hoses and secure them with the clamps, ensuring a tight fit.

3. Repair or Replace the Radiator

• Inspect the radiator: Look for corrosion or leaks. If damaged, proceed with replacement.
• Remove the old radiator: Disconnect the upper and lower radiator hoses, and remove any mounting brackets.
• Install the new radiator: Position the new radiator in place, reconnect the hoses, and secure it with mounting brackets.

4. Replace the Water Pump

• Remove the water pump: Drain the coolant, then remove the serpentine belt and any components obstructing access to the water pump. Unbolt the water pump and remove it.
• Install the new water pump: Clean the mounting surface, apply a new gasket or sealant as required, and install the new water pump. Torque the bolts to manufacturer specifications.

5. Check Engine Block and Head Gasket

• Inspect for leaks: Examine the engine block and head gasket area for any signs of coolant leakage.
• Replace gasket if necessary: If leaks are found at the head gasket, replace it, which requires removing the cylinder head. Follow manufacturer specifications for torque settings during reassembly.