Q: Car makes knocking noise

asked by on

My car is making a knocking noise, and there is a loud vibration.

A knock is never good to hear on a car and could mean catastrophic failure in the engine. It could be something simple like something coming loose and knocking in the engine compartment, but it could also be something as bad as a main bearing that has spun and caused there to be no oil flow to the pistons which can wear the rod bearing down to nothing. I would have a technician come out and inspect where the noise in coming from and have them determine what the solution will be.

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. Car makes knocking noise

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: I was told my fuel pump relay was good but fuel pump still doesn't work after replacing it.

Hi, thanks for your question. If you switched the relay to a different circuit and that circuit works, then the relay tests okay. The fuel pump relay is controlled by the PCM and you would need to scan the computer...

Q: Loose steering column - 1993 Saab 9000

There are 2 or more bolts which keep the steering column attached to the body structure under the dash. Possibly, these are loose, or worse, might have fallen out. This should be checked by a professional mechanic, like YourMechanic, before...

Q: Q: Why is my engine knocking?

A loud knocking noise coming from the engine can be any of several issues. Having to put 5 quarts of oil in the engine means that the engine was completely empty, basically. The engine oil's main purpose is lubrication, and...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...