What Causes Abnormal Noises from the Engine Compartment?
2 Answers
Main reasons include excessive wear of certain parts or improper assembly/adjustment. Owners can identify the source of the noise by its characteristics for targeted repairs. If abnormal sounds occur in the engine compartment, immediate inspection and repair are recommended to prevent more severe issues. Relevant information about engines is as follows: 1. Introduction 1: An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, and electric motors. 2. Introduction 2: For example, internal combustion engines typically convert chemical energy into mechanical energy. The term 'engine' can refer to either the power generation device alone or the entire machine including the power unit, such as gasoline engines and aircraft engines.
I've encountered the issue of strange noises coming from the engine bay several times. Most often, it's caused by loose or aged/cracked belts, especially that squeaky noise resembling a mouse's chirp – this is typically the sound of belt friction. It could also be a failed bearing, such as those near the air conditioning compressor or alternator; you'll notice a humming sound after driving for a while. If the water pump is failing, it may produce continuous noises, almost like a warning before leakage. I remember once helping a friend diagnose this – their water pump was on its last legs, emitting a constant tapping sound. Additionally, if the pulley is worn or deformed, it'll make noises upon acceleration, and in severe cases, it might even trigger the engine warning light. These aren't minor issues; it's best to have them checked at a professional shop as soon as possible to avoid the hassle of roadside breakdowns and towing.
