What Causes the Loud Engine Noise When Starting a Mazda?
2 Answers
Engine abnormal noises are often closely related to the engine's working cycle. Below are the specific details: Introduction: Engine abnormal noises usually have a clear connection with the engine's working cycle, especially noises from the crankshaft connecting rod mechanism and valve train, which are related to the working cycle. Typically, noises caused by gaps unrelated to the working cycle are often due to faulty engine accessories. If there is a continuous metal friction sound unrelated to the working cycle, it may indicate a problem with certain rotating components. Oil strainer issue: Poor sealing of the rubber ring can prevent the oil pump from properly drawing up oil during operation, leading to the intake of a large amount of air. This results in insufficient lubrication in the engine system, particularly in the hydraulic valve lifter section, causing metal knocking sounds. A clogged oil strainer can prevent normal oil intake into the engine lubrication system, leading to poor lubrication.
I've driven a Mazda for several years, and loud noises during startup are usually not a bad thing, especially on cold days. High engine RPM right after ignition is part of the normal cold-start procedure, designed to quickly distribute oil to all components and reduce wear. If the oil isn't fresh enough or has inappropriate viscosity, it can amplify the noise—check if the oil level is within the standard range. Additionally, belt components like the timing belt might be loose or worn, causing squeaking sounds, which should be inspected promptly to prevent breakage. Long-term neglect could affect other parts, so have a technician listen during routine maintenance to address potential issues early. Don’t worry too much—it’s just part of the daily driving soundtrack.
