Skip the auto shop - Our mechanics make house calls

Q: Knocking sound

asked by on

The car would start up and then quit. Finally, I got the car started and there was a knocking sound.

Hello. It sounds like there is something broken in the engine internally. A push rod could be bent, a lifter could be stuck, or the engine bearing could be messed up. Have your vehicle’s noise inspected by a certified technician, like one from your mechanic, to determine whether your engine would need to be replaced or rebuilt in order to fix this problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: wiper blades working reverse

I suggest first inspecting the wiper crank arm assembly between the wiper linkage and the motor. It may have slipped out of position. If that is secure, then yes, it sounds like you need the wiper motor and module assembly....

Q: My Kia Forte is making a grinding knocking noise when I put it in drive and accelerate and at about 5 mph and up it goes away unti

Hello. Exhaust systems can make a variety of sounds that we would not intuitively expect. When I was first learning about exhaust systems I was surprised to find out how dynamic they can be. I am assuming you are speaking...

Q: Power window doesn't work

The window regulator may have broke and is binding the motor, or the motor itself may be bad. Both of these are common problems and if you hear crunching when the window switch is pushed, the regulator is broke. If...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.