Skip the auto shop - Our mechanics make house calls

Q: Hear knocking at bottom of engine

asked by on

I hear knocking at the bottom of the engine.

A: Unfortunately, there can be several differe...

Unfortunately, there can be several different reasons that could duplicate the sound of a knock in the engine. With the information provided being limited, it is difficult to determine what the cause of the knock is. In a best case scenario, I would recommend checking the level of the oil, and if it is low, adding the appropriate amount and try starting your Kia Rio to see if the noise persists. If the problem remains, it may be time to enlist the assistance of a certified mechanic to go over your Kia with you. They will be able to diagnose your engine's knocking noise and perform the necessary repairs to get your vehicle running again.

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・Save up to 30%

Get a quote

What others are asking

Q: I have a bad knock sensor. Is it worth replacing?

Hello. Yes, you are correct - the P0325 is indicative of a failed knock sensor (or the knock sensor wiring). I think it is a rare circumstance where you would not want to make this repair. It is straightforward and...

Q: Brake pads, rotors, and maybe a scam?

This is a classic situation that leads a customer to feel like they're getting a raw deal. The honest truth is most of the time a mechanic isn't attempting to scam you. I have worked in the field for...

Q: Why does my car's RPMs spike randomly at a constant speed?

Depending on the terrain where you live, this may be a normal function of the engine downshifting. The vehicle should accelerate slightly when this happens, or should up under an increased load of some kind. With the age of your...

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...
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...