Skip the auto shop - Our mechanics make house calls

Q: Loud, grinding noise notice when I start my car.

asked by on

My serpentine belt and pulleys were replaced. That didn't solve the problem. I have a loud churning light knocking noise coming from under my hood.

My car has 124000 miles.
My car has an automatic transmission.

Hi there. Remove the serpentine belt and start the engine. If the noise is still present then its not the engine accessories. Then the noise could be a lifter tap that is either a lifter that is stuck or clogged from getting oil into it. If you are having an issue with the lifter tapping, then drain out some engine oil and add 1 quart of ATF Type F to the engine and run the engine at 3,000 rpm for 15 minutes. Then drain out the engine oil and change the filter. Fill up the engine with your engine oil that is normally used and start the engine up. See if the tapping noise has disappeared. If the noise is still there, then a lifter may need to be replaced. If you plan on replacing the lifter, I recommend replacing all of the lifters. If you need further assistance with a loud tapping noise when the engine is started, then seek out a professional, such as one from Your Mechanic, to help you.

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

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: Tapping noise when accelerating. 2010 Nissan Altima

Hi there - engine tapping noises under load are usually connecting rod bearing problems, although it is possible that it's just a weak valve lifter. Hard to say without hearing it. If you have a sound byte to pass to...

Q: How long does it take to put on an ac compressor in a Hyuandai sonota 03 automatic

According to service prodedures, it calls for about 3.9 hours to complete this job which includes replacing the a/c compressor as well as the refridgerant in the system.

Q: Honda Pilot engine misfire when cold out and engine running warmer than usual?

Hi There, It sounds like you may have a faulty coolant temperature sensor. This sensor relays the temperature of the coolant back to the ECM which uses this information to control many things such as when to turn the coolant...

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...
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...
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...