Greeted by a Screech (Loud Noise when Starting Vehicle)
January 31, 2021
No one likes to be greeted in the morning by having someone screech at you. The same goes for a loud, high-pitched noise your vehicle greets you with every time you start the engine. If you're wondering if that's normal, no, it isn't. And it is worth getting checked out. The good news is that it might be nothing serious. Then again, it may be.
The first things to suspect any time you hear a high-pitched sound coming from the engine are belts. They have tension on them and they're trying to turn lots of different pulleys, pumps and other equipment the engine needs to work properly. The noise could come from the belts starting to wear out and dry out. If one of those belts breaks at an inopportune time, not only can it strand you somewhere, the damage to the engine could be very expensive to fix.
Other things that will cause a high-pitched sound are the pulleys and tensioners. The tensioners keep the right amount of pressure on the belts and some pulleys contain rubber that dampens engine vibrations. The rubber in the pulleys can crack or deform with age, which prevents them from working correctly and may cause your belts to wear out.
A technician will check to see if the belts are worn or cracked. He or she will also check the tension on the belts, the condition of the pulleys and whether all components are aligned the way they should be.
Sometimes, the noise is nothing major to worry about, but it's still worthwhile to rule out any problems that have cropped up now or may appear in the future. You'll have a properly running vehicle that sounds like its engineers intended… quiet and smooth.
Auto Lab Livonia
36251 Five Miles Rd
Livonia, MI 48154
734-432-6000
http://www.autolablivonia.com
Need Service?
More articles from Auto Lab Livonia

A Head Start on Starting (Battery Testing)
May 4, 2025
If your vehicle isn't starting or doesn't sound like it used to when you crank it, the culprit may be the battery. You may have left a light on, or something plugged into one of charging ports. Maybe you accidentally left your vehicle in the "on" or "accessory" position when you last got out. M... More

The Truth about Tire Pressure (Tire Inflation)
April 27, 2025
Most light vehicles (under 10,000 pounds/4,500 kg) in North America sold from 2008 model year on have a feature that many people are confused about. It's the tire pressure monitoring system (TPMS). You may have some experience with it yourself if you own a newer vehicle. Vehicles with TPMS hav... More

Lubricate Driveshaft
April 20, 2025
See if any of these are happening to your vehicle. You feel it vibrating excessively underneath when its running, or you hear strange clunking, grating, or grinding sounds coming from beneath. Maybe its hard to turn your vehicle, or you can hear squeaking when youre going slow. Perhaps you fee... More