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.

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

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: Car makes clicking sound when engaging gear and also while driving on low speeds

Hi there. The clicking sound when you change the gear from 'P' to 'R' sounds like it could be either a motor mount or a worn CV joint (axle). I'm inclined to lean more to the axle with the clicking...

Q: White smoke and a knocking sound after fixing the diesel pump problem

Hello, thanks for writing in about your Toyota. If you are getting white smoke and a knocking sound it is most likely coming from the engine fuel injection. It's either out of timing or flooding the engine with too much...

Q: Vibration while in gear and stopped but fine driving

This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission...

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.