Skip the auto shop - Our mechanics make house calls

Q: Squealing noise coming from engine

asked by on

A squealing noise started coming from the engine a few days ago. I think the timing belt might need replacing.

A: Hi there, the Corolla has a timing chain th...

Hi there, the Corolla has a timing chain that won’t make a squealing sound because there are splines on the inside of the belt/chain to prevent slipping. There are tensioners and pulleys that can wear out over time causing unwanted noise from under the hood which could be happening. Typically, however, the serpentine belts are the cause of a squealing sound from underneath the hood. These belts power components like the water pump, alternator, and A/C compressor (if the car is equipped with A/C). Over time, they can lose their grip which will cause them to slip on the pulleys creating a squealing sound. If the belts haven’t been changed recently it’s most likely time for a replacement. Have a certified technician inspect the belts for you to find the cause of the sound.

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: When I turn the steering wheel it squeakes.

Hi there. In most cases, when you turn the steering wheel and you hear a squealing noise, it's commonly due to one of two things. First, the power steering fluid might be low which creates reduced pressure inside hydraulic lines...

Q: Ten days after dealership fixes car, it quits again

Hello. Sometimes shops can take an excessive amount of time to diagnose and repair your vehicle due to the fact that they have so many other customers at once. One solution I might recommend is that you give YourMechanic a...

Q: Can the power steering return hose problems cause the Check Engine Light to come on?

Hello there, you have several different issues going on with your 2004 Toyota Corolla. Without knowing what the Check Engine Light is, I cannot determine if it has anything to do with the engine shaking or not. The power steering...

Related articles

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...
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.