Skip the auto shop - Our mechanics make house calls

Q: Knocking from engine

asked by on

I can hear knocking coming from the engine compartment.

A: Hello, diagnosing a noise is a hands on jab...

Hello, diagnosing a noise is a hands on jab and must be heard firsthand for a proper recommendation. The noise could be coming from and item on the belt drive or possibly the engine itself. To pinpoint the cause of the noise, I would have a certified mechanic inspect the vehicle’s sound and engine to determine why it is knocking.

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: Loud rattling coming from underneath the vehicle

This could be caused by a loose lower cover plate. Trucks have a metal plate that protects the underside of the engine from debris. This plate is often removed for repairs and sometimes not all the bolts will be present...

Q: Knocking noise underneath car.

Hi, thanks for writing in. Diagnosing the exact source of a vibration or noise is typically only possible through an onsite inspection. However, after reading the symptoms you're describing, the two possible suspects may include the wheel bearings or the...

Q: Service Engine Light is on.

Different than the Check Engine Light, the Service Engine Light is typically triggered when a predetermined service interval has been reached. There are dozens of service schedules that could be coming up including oil, transmission, battery, ignition system (spark plugs)...

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...
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.