Q: Knocking sound in the engine

asked by on

I can hear a knocking sound in the engine. Car cranks up and starts.

A knocking sound in the engine generally means that the bearings in the engine are worn. When the bearings are worn, this allows the parts of the engine to have excess movement, causing the knocking noise. I would ask for help from one of the mechanics at YourMechanic to diagnose what is causing the knocking noise in your engine, so they can recommend a repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Knocking sound in the engine

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine makes tapping noise, exhaust blows bluish smoke

If you are burning oil and you have a noise in the engine, then you need to have the noise checked to see if it is coming from a piston. You may also have valve problems and oil getting through...

Q: Starts missing after it gets warmed up.

Hi there, It sounds like you may have a faulty idle air control valve or potentially a faulty MAP sensor. The IAC valve is activated when the car is warm and helps the engine cope with loads on it during...

Q: Sensor messed up

Hello. There should be a Check Engine warning light on the dash display. It could also be a loose connection if you recently had exhaust work done. If you have any failure in the catalyst sensors or wiring, it should...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.