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Labor on most timing belts is between 3-5 hours, putting your total cost between $400 -1,000. Remember, do not opt for a “just the belt” replacement. While the cost is cheaper, the chances of further failure increase significantly. If the water pump is being done at the same time, the labor should be minimal, and less than 1 hour, as the work to expose the water pump and remove the timing belt is being done anyway.

Most timing belt covers are plastic and have one or several inspection plugs, or ports, where you can quickly remove and look at a small portion of the timing belt. One of the first things to inspect is cracks on the belt. Rubber as you know will crack and chip as it gets older, and any evidence of cracks on the belt should immediately raise a red flag for a belt change.

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Your car battery starts your engine and your engine helps the alternator recharge your battery. There's more to it than that though. Learn how it works.

The timing belt is so crucial to your engine's operation that its failure is often catastrophic - meaning, not only does your vehicle suddenly not run, the internal engine is likely damaged. It is one of those parts that as much as the replacement is painful as routine maintenance, choosing not to perform this maintenance will absolutely lead to a catastrophic failure, and an even bigger bill. Below is what you need to know about a timing belt, its function, and how to make sure you stay on top of its replacement.

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If the wheel/hub bearings aren’t causing the grinding noises, it’s time to explore other parts that could be the source of your issues:

Be sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Always chock your wheels prior to lifting a vehicle. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Use caution when working with automotive batteries. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Do not wear ties or loose clothing when working on your vehicle.

The timing belt (or chain) is located toward the front of the motor beneath the timing cover. The belt is made with high-quality rubber and reinforced with nylon chords. This belt is under precise tension, and as the engine’s crank turns, it then turns the camshafts (and many times, the water pump) to keep everything in perfect timing.

Remember that once the new belt is in place and properly tensioned, always rotate the engine slowly by hand, checking and double-checking the belt alignment and make sure everything looks proper. If any resistance is encountered, stop! Recheck the alignment.

CV Joint A worn CV (constant velocity) joint can cause your vehicle to make grinding noises when making tight turns at slow speeds. Left unattended, a damaged CV joint can fail, leaving you with a vehicle that is stuck in park. If it fails while you’re driving, it can lead to a loss of control. Don’t waste any time in getting your vehicle in to your mechanic if you think this is the cause of your grinding noises.

A timing belt service is more than just the belt itself. While traditionally, everyone thinks of this change as “just the belt,” it is not. A timing belt is tensioned and held in the proper track by a series of tensioners and idler pulleys, all of which have bearings and the ability to fail. Likewise, many vehicles have a water pump that is driven by the timing belt. In these cases, it makes complete sense to change the water pump with a new unit at the same time, since the labor to expose the pump is being completed anyway.

From the roar of the engine to the sound of the brakes, you’re intimately familiar with the regular sounds of your vehicle. When there is a new and unfamiliar noise, it grabs your attention. If the sound persists for a few days, it’s time to get serious about finding the cause, especially if it’s a grinding noise.

Grinding noises are associated with rotating parts and rotating systems; any part or system that rotates can cause grinding. If your car starts making grinding noises, don’t wait to get it checked out -- have your technician take care of it before it turns into a bigger issue.

To determine if a wheel bearing is the culprit, begin driving your vehicle and make a turn to the right and then complete a turn to the left. If the grinding noise is louder when turning in one direction, the likely cause is a failing wheel bearing. If you suspect you have a bad wheel bearing, get your vehicle to your technician for a diagnosis.

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Because of severity of a belt breaking, every vehicle equipped with a timing belt will have a manufacturers recommendation on when to change the timing belt. These intervals are usually somewhere between 70,000 miles and 90,000. You can find recommendations specific to your vehicle by checking with the owner’s manual that came with your car or researching online.

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If a timing belt is not set up properly, “jumps time”, or worse yet – breaks, that functioning will cause the valves to be open at the wrong time. Because most engines are made with zero clearance between the piston top and the valves, this then causes in many cases the piston to collide with one or more valves in the cylinder head, causing bent valves and major damage.

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Discover why your car's serpentine belt makes noise and how to fix it. Learn about common causes, diagnostics, and solutions at AutoZone.

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Below is what you need to know about a timing belt, its function, and how to make sure you stay on top of its replacement.

Air Conditioning AC compressors can also be a source of a grinding noise, and you may only notice it when your air conditioning system is on. Be sure to get it fixed since it not only keeps you cool in hot weather, but it also helps remove moisture from your windows in the winter.

Remember, if your timing belt breaks, the damage is much, much worse. At this point, the cylinder head must be removed, valves replaced, or new remanufactured heads installed. This takes that timing belt job from $400 -1,000 and just raised it to $3,000 -5,000. In many cases, repairing a timing belt breakage is so expensive it is more than the value of the vehicle.

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If you suspect your vehicle is up for a new timing belt, come see the folks at AutoZone for all the parts, tools and advice you’ll need. If you need additional help with the job, check out our list of Preferred Shops in your area that can help you get the job done quickly!

As stated before, timing belts are composed of rubber, no different than a regular drive serpentine belt. Over years and constant heat cycling, the rubber begins to degrade, to the point where the belt finally fails. In most cases, a faulty timing belt will provide no warning of an impending break. You will be driving along, when suddenly the car dies.

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If you have heard of the term “Timing Chain” before, both a timing belt and chain perform the same duty. Their job is to keep the mechanical timing of the engine – the intake and exhaust valves opening and closing at the exact precise time needed. Today’s engines are composed of multiple valves per cylinder, sometimes as many as 5 – and doing this properly requires exact precision between the moving pistons and the opening of the valves.

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Unfortunately, timing belts rarely give any warning of impending doom. While there are other things that can speed up a timing belt’s decay, like oil or antifreeze leaking into the timing belt area (and often seen as an oil leak or water pump leak), in most cases, the belt is simply old, brittle, and breaks.

A common cause of grinding noises under your car are failing wheel or hub bearings. Wheel bearings allow the wheel and tire to rotate and are designed for low friction, while hub assemblies have an additional responsibility of securing the wheel and tire to the vehicle. If your wheel bearings are worn, it can cause a grinding noise while turning the vehicle. Poor steering and handling and uneven tire wear are just some of the effects of failing wheel bearings.

The timing belt is so crucial to your engine's operation that its failure is often catastrophic - meaning, not only does your vehicle suddenly not run, the internal engine is likely damaged. It is one of those parts that as much as the replacement is painful as routine maintenance, choosing not to perform this maintenance will absolutely lead to a catastrophic failure, and an even bigger bill.

Another thing to consider is that miles are only a general indicator, older, low mileage vehicles should always be considered for a timing belt change because usage is not the only thing that degrades the rubber – time will as well. For example, you own a 2016 vehicle with 60,000 miles on it, and its timing belt recommendation is 70,000 miles. At this point, it is time to start planning your timing belt service. In contrast, you own a 2001 vehicle that has been minimally driven, only has 40,000 miles, but there is no evidence of a timing belt ever being replaced. Because this belt is over 20 years old, it is prime for replacement. Either way, this is one maintenance item you absolutely want to plan for, and do not want to neglect.

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Learn about car belts, discover wear signs, and decide between DIY or professional replacement. Find top-quality replacements at AutoZone.

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In most cases, a timing belt kit will consist of the belt itself, 2-3 idler pulleys, and a tensioner. When the job is done, all these components will be changed out. In most cases, a timing belt kit will run between $100 -350.

If you decide to do the job yourself, make sure you follow each step of removal and reassembly perfectly, and research as much as possible on the job. Many timing belt jobs require the camshafts to be held in place by a special tool – do not let this scare you. While these tools are readily available, many of them are vehicle specific, so there can be a multitude of them. Many other tricks are shown online on how to keep the camshafts properly in place when installing the new belt, and many more do not require any tools for this at all.

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There is nothing worse than paying for a timing belt service, declining the water pump replacement for an additional $100, only to find out 6 months later that the water pump is leaking, and now everything must be replaced again.

Is your car making a squealing noise? It might be a noisy idler pulley. Explore symptoms, causes, and solutions to address this common issue.

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Alternator Grinding noises can also be a sign that the alternator is wearing out. Modern alternators have a decoupler pulley system that helps save fuel but can make a grinding noise that is hard to find. Designed to charge your car’s battery and power the electrical system, a failing alternator can leave you on the side of the road with a dead battery.

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Another thing to consider is service records. Whenever buying a used car that is equipped with a timing belt, always ask about timing belt service. When was the last time it was performed, if ever? Does the owner have documentation in the form of receipts or invoice? Has the vehicle been to the dealer? Keep in mind, calling the dealer and asking for service records may lead to clues on when the belt was last changed, or if it was at all. Finally, when in doubt, change the belt!

Water Pump A failing water pump can cause a grinding noise while the engine is running. Without a fully functioning water pump, your car can overheat. If you suspect that your water pump is failing, schedule an appointment with your mechanic before further damage is done to your vehicle.

Brakes Grinding noises can appear when the brake friction material or brake linings have worn away and the steel brake rotor is rubbing against the metal brake pad backing. This causes metal-to-metal contact when the brakes are applied, creating a grinding noise. Typically, the grinding noise will come from either the front or rear brakes, but generally not both. The repair may include new brake pads and rotors.