What Causes the Dull Roaring Sound of an Engine?
2 Answers
The reasons for the dull roaring sound of an engine are: 1. Severe carbon buildup in the engine; 2. Abnormal cylinder operation; 3. Excessive engine consumption leading to insufficient oil. Solutions include: 1. Inspect the vehicle's intake system to check if the air filter is dirty or if the vacuum tube is aged and leaking. Cleaning the throttle can help avoid affecting the air intake volume; 2. Examine the vehicle's exhaust system to see if the three-way catalytic converter is clogged, and clean or replace it promptly; 3. Check if the oil grade used is inappropriate, as using oil with too high a grade can cause the engine to sound dull. The engine should undergo regular maintenance, with parts replaced according to the corresponding maintenance schedule. Keep the engine compartment clean and periodically check for abnormal noises in the engine, which can help identify and resolve issues early. The engine is the heart of the vehicle, and only when it operates normally can the vehicle run smoothly.
Oh, I've driven quite a few old cars, and that dull roaring sound from the engine shouldn't be ignored—it's usually linked to several common issues. The most likely culprit is an exhaust system leak, like a cracked muffler or a loose tailpipe, allowing gases to escape and create a booming noise. Or it could be damaged engine mounts; these are responsible for dampening vibrations, and when they fail, they cause the engine to shake violently, producing a low growl. Belt issues are another possibility, such as aging or loose power steering belts that start with squeaky friction and escalate into heavy rattling. For diagnosis, you can start by popping the hood to pinpoint where the noise is loudest—check if it's coming from the exhaust section. If it's hot exhaust leaking, leaving it unrepaired is both dangerous and environmentally harmful. Routine maintenance checks on these components' lifespan can prevent problems—remember to service your car regularly to avoid minor issues snowballing into major ones. I once saw a neighbor’s car end up needing an expensive engine replacement after ignoring this very sound.
