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.

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When bearings wear out or lose their lubrication, they can create a grinding noise. This noise is normally more noticeable when turning your vehicle to the side with the worn out bearing on it. If you hear grinding, loud humming, or rumbling coming from your vehicle during turns or while accelerating, there’s a good chance your bearings are due for replacement.

When wheel bearings wear down and stop moving smoothly, they may produce a clunking or banging sound. Often, this is only noticeable when a bearing has experienced significant wear and tear—although it can also be apparent when travelling over surfaces with uneven patches.

Enough wear and tear on your drive axle can eventually affect the way your vehicle steers. If you notice that your vehicle no longer handles as responsively when turning the wheel (especially if it’s more prominent on one side, since bearings on both sides of a vehicle rarely wear out at the same time), have the bearings in your car checked by a professional mechanic ASAP.

If you suspect a problem with your wheel bearings, one good rule of thumb is to take a closer look at the rubber on your vehicle. If the tires are balding on one side and have plenty of tread on the other, a worn-out bearing is likely the culprit.

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.

Even in cars without ABS, driving with worn-out bearings can cause major handling problems. Enough friction on one side of the car can result in your vehicle pulling to one side. This can make turning in one direction much more difficult than the other, reducing your ability to manoeuvre in potentially dangerous situations. It can also cause you to drift to one side while driving in a straight line unless you’re constantly applying pressure in the opposite direction—which can cause you to become fatigued more quickly, making longer drives less comfortable and much less safe.

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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.

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

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.

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.

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.

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When the wheel bearings on one side of your car begin to fail, they’ll cause more friction in the hub assembly of the wheels they’re attached to. As a result, that wheel won’t turn as fast as the one on the other side of your vehicle—which means the tires won’t wear evenly on both sides.

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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.

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!

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One of the first signs of worn out wheel bearings you should look out for is what feels like a reduction in your car’s power. Worn out bearings often create significant wobbling in vehicles, which can make your car unsteady above certain speeds and create friction that prevents them from accelerating properly.

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Most of the time, wheel bearings fail when the seal protecting them breaks. This allows heat, water, dust, and other debris to enter the hub assembly, where it can contaminate the lubricant that keeps your bearings moving smoothly while you drive. This contamination can eventually cause the bearings to rust, which prevents them from moving smoothly against each other and creates friction within your hub assembly—putting strain on your driveshaft and ultimately your transmission.

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.

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.

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.

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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Advice, how-to guides, and car care information featured on AutoZone.com and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.

That wobbling we just mentioned will probably first be noticeable in your steering wheel. You might not feel as though it’s much of an issue at first—but if you don’t replace the bearings soon, the friction will increase and can cause your entire car or truck to vibrate. In these cases, it’s best to replace the bearing ASAP to prevent unnecessary friction on your driveshaft and the rest of your transmission.

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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.

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.

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!

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

We know all about wheel bearings, why they fail, and when they need to be replaced. Read on to learn about 8 common signs of wheel bearing problems so you can recognize a failing bearing in your own vehicle and order a high-quality replacement for it before it leads to other problems.

Wheel bearings just aren’t meant to last forever. In general, it’s a good idea to replace them every 85,000–100,000 miles (roughly 136,000–160,000 kms). Of course, the lifespan of your wheel bearings also depends on the quality of the products you buy—our high-quality aftermarket replacement wheel bearings are designed to last significantly longer than the cheapest options you’ll find online.

You may not think about the wheel bearings in your car often—but when there’s a problem with them, it’ll cause issues that make driving noticeably harder. Of course, figuring out exactly what issues come from worn-out wheel bearings can be difficult for people without a lot of mechanical experience. That’s why we’re here to help.

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In many newer cars and trucks, wheel hub assemblies also contain the sensor for the anti-lock braking system. When the bearings inside the hub assembly fail, the ABS sensor on your dashboard may turn on.

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.

You might think this is just an annoying light on the dash you can ignore while driving, but we strongly recommend against doing so (or driving while any of your dashboard’s warning lights are on). The ABS sensor determines when your anti-lock braking system engages—and if it detects significantly more friction on one side of your vehicle than the other, it may turn ABS on when you’re not expecting it, creating a serious safety hazard.

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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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.

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.