Back to all

Sterling Heights Car Owners Ask: Why Do I Need to Change My Serpentine Belt?

May 16, 2016

Any Sterling Heights driver who understands preventive maintenance knows that “if it ain't broke, don't fix it” is bad auto advice. Replacing a part before it breaks is much less costly for Sterling Heights residents than repairing the engine damage that comes after a part breaks or fails. A good example of this is the serpentine belt.

The serpentine belt gets its name because of its circuitous path around the engine. The serpentine belt is driven by the engine and powers a number of systems, as follows:

1. The serpentine belt spins the compressor that generates the cool air for the air conditioning system.
2. The serpentine belt powers the alternator. The alternator generates electricity for use in the vehicle's electrical systems and to charge the battery. Without the alternator, the battery wouldn't last more than a few miles.
3. In many Sterling Heights residents' vehicles, the serpentine belt runs the pumps for both the power steering and the power brakes. In other vehicles, the power steering pump may be electric and the power brakes may use a vacuum boost.
4. On many vehicles, the serpentine belt powers the water pump. The water pump keeps coolant circulating through to maintain appropriate operating temperatures. In some Michigan vehicles, a timing belt runs the water pump.

When a serpentine belt fails, all of these systems fail as well, which can lead to engine impact.

Replacing parts before they break saves money for Sterling Heights residents by preventing more repairs and the frustration of having your vehicle in the shop for an extended period of time. If you're looking for an adage to apply to good car care, you might remember the old story of how “for want of a nail, the kingdom was lost.”

Sterling Tire & Auto
34701 Van Dyke Rd
Sterling Heights, Michigan 48312
586-264-7775

Need Service?

Request a Quote

More articles from Sterling Tire & Auto

The Car Fluid Most Drivers Forget—And Why It Matters

August 23, 2026

Heres an automotive part you might not be familiar withthe differential. Its a component that transfers power from the driveshaft to the wheels. Its called a differential because the left and right drive wheels travel at different speeds when you make a turn. During that turn, the wheel on the ... More

Save Your Tires and Fuel: Why TPMS Is More Than a Warning Lightc

August 16, 2026

You know that little light on your dashboard that looks like a tire? Dont ignore it. Its a lot more than a warning light. Its trying to tell you something that can protect your tires, improve your fuel economy and keep your vehicle traveling safely down the road. Its called TPMS. The abbreviati... More

That Clunk Isn’t Normal: Why Your U-Joints Need Lubrication (Lubricate U-Joints)

August 9, 2026

If youve noticed a clunk when shifting from park to drive, accelerating from a stop or letting off on your accelerator, it may be your vehicle warning you about dry or failing U-joints. Those are small, critical components in your drivetrain that allow the driveshaft to flex as your suspension mo... More