A serpentine belt inspection looks at the single belt that keeps your alternator, water pump and other engine accessories turning.
A serpentine belt inspection is part of the important system care we handle at Hogwash Oil Change Center, 1600 US-46 in Parsippany, NJ. It is a small check with a big job: making sure the belt that drives several of your engine’s accessories is still in shape to keep doing it.
A worn belt rarely gives much warning before it fails, and when it goes, several systems can stop working at once. Looking at the belt as part of routine maintenance is a simple way to spot trouble while it is still just wear.
Our technicians provide reliable service with attention to detail, using the latest equipment, with the goal of keeping your car safe and reliable on the road. If you have questions about your vehicle’s belt, or about what happens if the inspection finds wear, call 973-335-3000.
If an inspection shows the belt is worn, we also replace serpentine belts, and replacing a belt before it fails helps you avoid a breakdown.
| Serpentine Belt | Starting at $99.99 |
Prices as listed on our service menu. “Starting at” prices vary by vehicle, so call 973-335-3000 with your year, make and model for an exact number.
Most modern engines use one long, ribbed rubber belt, the serpentine belt, that snakes around a series of pulleys at the front of the engine. The crankshaft turns the belt, and the belt turns the accessories. Depending on the vehicle, those typically include the alternator, the power steering pump, the air conditioning compressor and, on many engines, the water pump.
That is why the belt matters so much. The alternator keeps the battery charged and the electrical system running. The power steering pump, on vehicles that use one, makes the wheel easy to turn. The water pump moves coolant through the engine. One belt connects all of them.
Serpentine belts are made of rubber compounds that age with heat, time and mileage. The ribs wear, the rubber hardens, and small cracks can form. None of that is visible from the driver’s seat, and a belt can look fine from a distance while showing real wear up close.
An inspection turns an unexpected roadside failure into something you can plan for. If the belt is in good shape, you know where you stand. If it is showing its age, you have time to decide on next steps before it becomes urgent.
Some of the most common signs of a bad serpentine belt are things a driver can notice:
Several of these can have other causes. Any of them is a good reason to have the belt looked at soon.
A serpentine belt inspection is generally a visual and hands-on check of the belt and the path it runs on. It typically looks at the ribbed side for cracks, missing pieces and uneven wear; the back of the belt for glazing or damage; the edges for fraying; and whether the belt is sitting correctly in each pulley groove.
Contamination matters too. Oil or coolant on a belt can make it slip and break down faster, and a leak that is soaking the belt is worth knowing about on its own. Belt tension also plays a role, which is where the tensioner and pulleys come in.
Most serpentine belt systems use an automatic tensioner, a spring-loaded arm with a pulley that keeps the belt tight as it stretches with age. There are also idler pulleys that guide the belt around the engine. If a tensioner weakens or a pulley bearing wears, the belt can slip, squeal, wear unevenly or even come off.
A noisy belt is not always a worn belt. Sometimes the sound comes from a pulley or the tensioner, which is one more reason a proper look is better than guessing.
Replacement intervals for serpentine belts vary by manufacturer, and your owner’s manual will list what applies to your vehicle. Inspections are a different matter: because a belt can wear faster than expected from heat, contamination or a weak tensioner, checking it during routine maintenance visits makes sense.
Older vehicles, higher-mileage engines and cars that sit through hot New Jersey summers and cold winters all put extra stress on rubber parts. If you do not know when the belt was last looked at, ask for an inspection on your next visit.
When a serpentine belt breaks, every accessory it drives stops at once. The battery stops charging, so the car will eventually lose electrical power. Steering can become very heavy on vehicles with a belt-driven power steering pump. On engines where the belt drives the water pump, coolant stops circulating and the engine can overheat quickly.
If you see warning lights, feel the steering stiffen or watch the temperature gauge rise, pull over safely and turn off the engine. Driving on an overheating engine can turn a belt problem into a much larger repair.
The belt works hand in hand with other systems. On many engines it drives the water pump, which ties it to the radiator flush and fill that keeps the cooling system working. It is also a natural add-on to a Mobil 1 oil change or air filter replacement, since those are routine visits too.
Our shop is on US-46 in Parsippany. Hours are Monday through Saturday, 8:00 AM to 5:00 PM. See the full list of services.
Drivers often mix up the serpentine belt and the timing belt, but they are different parts with different jobs. The serpentine belt runs on the outside of the engine, where you can usually see it when the hood is open, and it drives accessories like the alternator. A timing belt sits behind covers on the engine and keeps the crankshaft and camshafts turning in step, which controls when the valves open and close. Many engines use a metal timing chain instead of a belt.
The distinction matters because the two are serviced differently and fail in different ways. A serpentine belt inspection covers the visible accessory belt only. Your owner’s manual lists whether your engine has a timing belt and, if so, when the manufacturer calls for it to be replaced.
You do not need tools to keep an eye on your belt system. Listen when you start the car on a cold or damp morning; a brief chirp that keeps coming back is worth mentioning at your next visit. Watch the dashboard for the battery or charging light and the temperature gauge. Notice whether steering effort changes.
If you ever check under the hood, look for oil or coolant on the front of the engine, since fluid on the belt shortens its life. Never reach near the belt while the engine is running. If anything looks or sounds off, call 973-335-3000.
Answers to the questions drivers ask most about serpentine belts.
A check of the belt and its path for cracks, fraying, glazing, contamination and correct fit on the pulleys.
It drives engine accessories such as the alternator, power steering pump, air conditioning compressor and, on many engines, the water pump.
Squealing, visible cracks or fraying, heavy steering, a charging warning light, rising engine temperature or warm air from the A/C.
It is not recommended. The battery stops charging and, on many engines, the engine can overheat. Pull over safely.
Follow the interval in your owner’s manual, and have the belt inspected during routine maintenance.
A worn belt, a weak tensioner, a worn pulley or contamination can all cause noise. An inspection helps find which.
Serpentine belts start at $99.99 on our service menu. The exact price depends on your vehicle; call 973-335-3000 with your year, make and model.
Our Parsippany shop serves drivers from Rockaway, Montville, Lake Hiawatha, East Hanover and Mount Tabor. See every town on our service areas page.
1600 US-46, Parsippany, NJ 07054 · Mon–Sat 8:00 AM–5:00 PM
Call 973-335-3000 or drive in to 1600 US-46, Parsippany.