Water Pump Impeller Flow Explained Normal Flow: Coolant enters smoothly, the impeller pushes it outward, and heat is removed efficientlykeeping engine temps stable Cavitation: Low pressure forms Does your water pump leak antifreeze? The cooling system plays a critical role in ensuring the engine operates smoothly and efficiently. To prevent the engine from overheating and ensure it runs optimally, the coolant must be at the had a leak coolant leak coming from water pump does it look like it just needs new gaskets : r MechanicAdvice