Lexus LX570 slapping noise from under hood with coolant leak due to serpentine belt failure and loose radiator hose on Lexus LX570

Some Lexus LX570 owners report experiencing a slapping noise from under the hood along with coolant leaks, which may indicate serpentine belt failure and a loose radiator hose. These issues can arise from a worn-out serpentine belt, leading to malfunctions in critical components like the alternator and power steering pump, as well as producing squealing noises due to a bad tensioner or stuck pulley. Additionally, a loose radiator hose can cause coolant leaks, an increased temperature gauge, and decreased engine performance. It is crucial for owners to promptly check the belt tension and inspect the radiator hose for looseness or damage to prevent further complications. If the serpentine belt is found to be faulty, replacing it and addressing any issues with the tensioner or pulleys is recommended. Similarly, tightening or replacing a loose radiator hose is essential to avoid overheating. Consulting a professional mechanic is advisable for those unsure about diagnosing or fixing these problems to ensure safe vehicle operation.