1. Coolant Leak: A leak in the cooling system, such as a cracked radiator or a loose hose, can cause coolant to escape and make a gurgling or swishing sound as it moves through the engine bay. Check for any leaks by inspecting the radiator, hoses, and water pump.
2. Air in the Cooling System: Air pockets can become trapped in the cooling system, causing a gurgling or swishing sound. This can happen after certain repairs or maintenance, such as replacing the coolant or flushing the system. Try bleeding the cooling system to remove any trapped air.
3. Faulty Water Pump: A failing water pump may not be able to circulate coolant properly, causing a loss of pressure and a gurgling sound. Inspect the water pump for any signs of leaks or damage, and consider replacing it if it's faulty.
4. Clogged Radiator: A clogged radiator can restrict the flow of coolant, leading to overheating and a gurgling sound. Check the radiator for any blockages, such as leaves, dirt, or debris, and clean or replace it if necessary.
5. Faulty Thermostat: A malfunctioning thermostat can prevent the coolant from flowing properly through the engine, causing overheating and a gurgling sound. Inspect the thermostat and replace it if it's not functioning correctly.
It's important to address this issue promptly to prevent any damage to the engine.
If you're not comfortable diagnosing and fixing the problem yourself, it's best to take your Blazer to a qualified mechanic for a proper diagnosis and repair.
