What Causes Radiator Coolant Bubbling? If you see bubbling in the radiator or coolant reservoir, it usually means there’s air or gases in the cooling system. Here are the main causes:1. Air in the Cooling System • If the system wasn’t properly bled after a coolant change, trapped air can cause bubbling.2. Blown Head Gasket (Most Serious Cause) • A damaged head gasket can let combustion gases enter the coolant, causing continuous bubbling and overheating. • Look for white smoke from the exhaust,
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🔥🧪 Combustion Test Failed – Internal Coolant Loss Detected | MX13 Engine 🧪🔥 This MX13 engine came in after the customer reported losing coolant with no visible external leaks. During inspection, our specialist tech performed a combustion gas test on the cooling system, and as shown in the test results, the fluid changed color — confirming combustion gases present in the coolant. 💡 What a failed combustion test means: A positive combustion test indicates that exhaust gases are entering the c
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