A blown or damaged head gasket can allow combustion gasses to leak into the cooling system, creating air bubbles. This issue is often accompanied by other symptoms, such as overheating, loss of coolant, or a milky-brown substance in the oil.
2. Air in the Cooling System:
Air can enter the cooling system during coolant changes or when servicing other components. If the system is not properly bled or filled, air pockets can form and cause problems.
3. Faulty Thermostat:
A malfunctioning thermostat can trap air in the cooling system, leading to air bubble formation. A stuck-closed thermostat prevents coolant from circulating properly and can cause overheating, while a stuck-open thermostat can lead to air pockets.
4. Leaking Coolant System:
Leaks in hoses, gaskets, or other components of the cooling system can allow air to enter. Check for any visible leaks and inspect hoses and connections for cracks or damage.
5. Water Pump Issues:
A faulty water pump may not properly circulate coolant, leading to the formation of air bubbles. Check the water pump for signs of wear or damage, and ensure it is functioning correctly.
6. Improper Coolant Mix:
Using the wrong type of coolant or an incorrect coolant-to-water ratio can cause air bubble formation. Refer to your vehicle's owner's manual for the recommended coolant type and mix ratio.
