Things That Cause A Squealing Sound On Your Car | Shingle Springs Subaru Service

It's 6:00 a.m. and it's time to go to work, shuttle the kids to school or just enjoy a quiet weekend morning -- that is, until you turn on your car's engine and it begins to make an ear-piercing screech! A car that makes a loud squeaking or squealing noise can be a nuisance, and ruin your morning vibes. Instead of getting on the neighbor's nerves, have any irritating noises made by your car checked out by the experts. At Shingle Springs Subaru, we know Subaru engineering better than anyone else in the region! Find out the four things that most commonly cause a squealing sound on your vehicle.

Technician Replacing Brake Pads 

4. Squeaking Brakes

Does the squealing sound only come from your car when you're engaging the brakes? It might be time to replace those brake pads. It's not uncommon for your brakes to squeak and squeal, as metal components rub together to help generate the friction that slows down your car. Some brake pads even have a metal wear indicator tab that rubs up against the rotor and squeeks to let you know it's time to get new brake pads. If the squeaking is only intermittent, there's probably no need for service. But if your brakes are chirping consistently, be sure to have a technician take a closer look. It may be time for some important brake system maintenance.

The serpentine belt winds around a number of pulleys, which can bend from improper tension and start to squeak or rattle 

3. Chirping Belts

If the chirping sound comes from under the hood, and doesn't have anything to do with brakes, it's likely to do with the serpentine belt system. On most modern cars, a single, long serpentine belt spins around a number of important pulleys and tensioners. The belt delivers mechanical engine power from the driveshaft to accessories like the water pump, power steering pump, alternator and others. Over time, fluid leaks can glaze the belt, causing it to slip on the tensioners and pulleys. This slipping can create a rhythmic, repetitive chirping noise. Often, this noise is worse in cold weather, and goes away after a minute of letting the engine warm up. Thankfully, belt replacement on your car is a routine procedure that won't cost you too much in parts or labor.

2. Bad Pulleys & Tensioners

If it's not the belt itself that's gone bad, it could be the pulleys or tensioners that are making noise. The tensioner keeps the correct level of tension on the belt so, even as it stretches out a bit over time, it continues to spin all the pulleys. A bad tensioner can allow the belt to squeak. Or, if a pulley on an accessory like a power steering pump is bent or a bearing has gone bad, it might start squeaking and the whole pump may need to be replaced. You'll need to have a technician identify the squeaking component to fix this problem once and for all.

The crankshaft pulley is attached to the engine's crankshaft and drives the serpentine belt 

1. Alternator Whine

The alternator is one such accessory that receives power from the engine via the serpentine belt. It helps to generate electricity to run the stereo, climate controls and lights on your car. If two wires start to brush up against each other somewhere under the hood, or the alternator isn't properly grounded, you can experience all sorts of problems. The alternator can start to whine or groan from a bad alternator bearing or a bent pulley. It can even cause glitches in the electrical system, like causing the pitch of radio static to rise and fall along with your RPMs, or your lights to flicker. If your car has strange electrical problems and makes odd sounds, the alternator should be checked out by an expert technician at Shingle Springs Subaru.

Shingle Springs Subaru

4045 Wild Chaparral Dr
Directions Shingle Springs, CA 95682

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