How to Solve Loud Car Engine Noise?

[ORylee]

Solutions for loud car engine noise: 1. Poor fuel quality causing loud engine noise: When low-quality fuel is used, the combustion inside the engine deteriorates, leading to strong vibrations and noise during operation. The solution is to promptly switch to high-quality fuel. 2. Loose plastic parts in the engine compartment causing noise: If inspection confirms that the noise is coming from plastic components, tightening them can resolve the issue. 3. Loose engine mounts causing loud engine noise: Engines are typically supported and fixed by engine mounts, which can age and loosen over time, leading to noise during operation. Inspecting and tightening the engine's mounting components can alleviate the noise. 4. Loud engine noise during cold starts: When a vehicle has been parked for an extended period, all the lubricating oil flows back to the oil pan, preventing the engine from receiving adequate lubrication. This is a normal phenomenon.

[OAngela]

I've dealt with loud engine noise several times, and usually start by checking a few common areas. Engine oil is crucial - check if the level is sufficient or if it hasn't been changed for too long. Insufficient oil can cause dry friction in the engine, leading to noise. Then listen to the source of the sound - if it's a squealing noise, it's mostly a loose belt. Just grab a wrench and tighten the tensioner yourself. The exhaust pipe also needs careful inspection - air leaks at the joints or rusted-through mufflers can amplify the sound. Last time, my car had a hole in the exhaust pipe. Worn engine mounts are another hidden culprit - cracked rubber components transmit vibrations. Also, don't forget the air filter - when severely clogged, restricted airflow can make the engine roar. If you can't identify the cause, it's best to visit a repair shop, as you lack professional equipment to inspect precision components like valves or crankshafts.

[Arthur]

My old car used to have a loud engine noise, and it took me a long time to figure out the cause. The lesson learned is not to rush into random repairs—first, identify the type of sound. A low-frequency humming vibration is likely due to worn-out mounting bushings, which require replacement. A sharp squeaking noise often points to belt issues, and adjusting the tension or replacing the belt can solve it. A dull roaring sound might indicate an exhaust system leak, especially if the gasket has hardened or the muffler is damaged internally. Also, be cautious if the noise is loud during cold starts—it could mean the oil viscosity is too high or its low-temperature flow is poor. Here’s a handy tip: if the noise suddenly gets louder when the AC is turned on, it might be due to compressor bearing wear. Now, every time I change the oil, I take the opportunity to check these areas—prevention is more important than repair.

[DiJessica]

A suddenly louder engine noise can be really annoying. Here's a three-step troubleshooting guide. First, check basic items: Pull out the dipstick to see if the oil level is normal, and inspect the air filter for clogging - these two can be done yourself in five minutes. Next, start the engine and locate the sound: If there's abnormal noise from the belt area in the engine compartment, adjust the tensioner pulley; if there's a popping sound underneath, focus on checking for exhaust leaks. Finally, consider professional items: Engine mount aging requires a lift for inspection, and excessive valve clearance needs measurement with a feeler gauge. Last month, my car had valve issues - it became quiet immediately after adjustment. Remember not to overlook fuel quality, as poor gasoline can cause knocking and increased noise.