What people keep running into with engine noise
Complaints tagged engine noise, each raised by more than one person. One-off posts are not included.
9 recurring problems · 133 people · 4 forums we read
Raised more than once
Most people first.
- 49How to explain an intermittent car noise to a mechanicIntermittent car noises are notoriously difficult to show a mechanic because they often refuse to happen during a test drive. Without proof, drivers struggle to get an accurate diagnosis, sometimes leading them to waste money replacing the wrong parts like sway bar links while the underlying mechanical problem remains unsolved.
- 30How to figure out what an unfamiliar car engine noise isUnfamiliar engine noises like chattering, squeaking, or sounds that change when you turn the steering wheel make it difficult to figure out what is broken. Without knowing the source, car owners cannot tell if the vehicle is safe to drive or what repairs are needed.
- 26Why does my car make a loud rattle when starting the engine?An engine startup rattle indicates a mechanical noise occurring immediately upon ignition. This issue stops the engine from idling smoothly and can cause severe shaking throughout the vehicle cabin.
- 15Why does my car run terribly and stutter after a long drive?Extended driving triggers severe engine sluggishness, unusual valve train noises, and random cylinder misfire codes. These sudden performance drops cause RPM stuttering and electrical warnings that leave drivers stranded and unable to reach a diagnostic scanner.
- 4Engine rattling noise and sudden coolant leak while drivingA rattling or knocking noise under acceleration paired with a sudden coolant dump usually points to a severe cooling system failure or overheating issue. Continuing to drive risks catastrophic engine damage, which is why towing it immediately is the safest choice while checking for obvious hose breaks or water pump leaks.
- 3Grinding noise and smoke from under the car hoodA grinding sound accompanied by sharp-smelling smoke typically points to either a seized component like a water pump or a heavily slipping drive belt. Continuing to drive risks complete accessory failure or engine overheating, making it necessary to inspect the belts and pulley covers before starting the car again.
- 3Is it safe to drive with a noisy AC compressor pulley?A noisy or squealing AC compressor pulley with play risks seizing up and destroying the serpentine belt and surrounding components. This sudden noise leaves drivers unsure whether the play is normal, whether to replace just the moving part or the entire assembly, and if they can safely keep driving.
- 2Why is my brand new serpentine belt still squeaking?A brand new serpentine belt can still squeak during startup, acceleration, or after driving in the rain. This ongoing noise prevents drivers from resolving the issue with a simple belt replacement alone, often requiring them to investigate pulleys, tensioners, or alignment.
- 2How to check if a vibrating radiator is caused by a bad fanNoise and vibration coming from under the hood often stem from a damaged radiator fan assembly, bent blades, or a failing fan motor. If left unverified, a broken or non-running fan can lead to poor engine cooling, potential overheating, and costly engine damage.
Comes up alongside
Topics that keep appearing on the same problems — not topics with similar names.