Skip the auto shop - Our mechanics make house calls

Q: Motor has a tapping sound at idle, gets louder as you rev higher.

asked by on

My engine has a knocking sound when its started, it gets a little louder as the acceleator is pressed. The car has no leaks and no engine lights on either

My car has 97000 miles.
My car has an automatic transmission.

A light tapping noise from the engine may be caused by a low oil level as there isn’t enough oil flowing through the engine. Louder clacking and knocking noises that sound like they are coming from the lower end of the engine may be the result of a mechanical failure like a worn rob bearing. Mechanical problems often follow engine rotation and will get faster as the engine speed is increased. Consider taking your vehicle to a local repair facility and have an experienced technician diagnose the engine noises.

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: my battery light stays on

You need to check to make sure the large power wire to the alternator is getting power. If it is not then you may have to check the wire from alternator to the battery fuse box for burned out wires...

Q: My aftermarket crankshaft pulley is wobbling a little when it idles. Does it just need to be tightened, or replaced?

The harmonic balancer should not wobble at all. The heavy bolt that holds the balancer to the crankshaft snout is quite tight. Presumably the balancer bolt was torqued to the Factory Service Manual value, and so you cannot safely tighten...

Q: Random whirring noise while moving

What you are describing sounds like a wheel bearing that may be starting to fail. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...