Engine Noises
Sounds coming from under the bonnet — knocking, ticking, squealing, and grinding that could point to engine problems.
Engine noises can range from minor annoyances to signs of serious trouble. Because the engine is the heart of your car, any unusual sound coming from under the bonnet deserves attention. Some engine noises, like a slight ticking when cold, can be perfectly normal and may disappear once the engine warms up. Others, like a persistent knocking or grinding, could mean something important needs fixing.
The noises listed below are the most common engine-related sounds drivers notice. Each entry describes what the noise sounds like, explains the most likely causes, and gives you practical advice on what to do next.
Grinding When Starting the Engine
See a Mechanic SoonA harsh grinding or crunching noise when you turn the key or press the start button. It sounds like metal teeth clashing together. The engin…
Knocking or Pinging Under Acceleration
Schedule a VisitA metallic knocking or pinging sound that gets louder when you accelerate or drive uphill. It sounds a bit like someone tapping on a metal p…
Squealing Belt on Startup
Schedule a VisitA loud, high-pitched squeal or screech when you first start the car, especially on cold or damp mornings. It usually lasts a few seconds to …
Ticking or Tapping from the Engine
No RushA rhythmic ticking or tapping sound coming from the top of the engine, almost like a sewing machine or a pen clicking. It usually speeds up …
Rough Idle Vibration
No RushThe engine shakes or vibrates noticeably when the car is stopped at traffic lights or in a queue with the engine running. You might feel it …