Every manufacturer has a prescribed replacement interval for vehicles that use a timing belt, and you should honor that interval. Remember that a timing belt replacement may cost up to $1,000, but an engine timing failure can do much more damage and cost you several thousand dollars to repair.

Given the damage that can occur as a result of a failed wheel bearing, not to mention the dangers, this further reinforces the importance of getting those bearings checked and repaired the moment you realise there’s a problem.

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Wheel hub bearings support the weight of a vehicle and enable wheels to rotate smoothly, making them a critical component of a vehicle's wheel assembly.

Your timing chain or belt is connected to the crankshaft pulley at the bottom of the engine and to the camshaft pulley or pulleys at the top of the engine and is designed to turn the camshafts at a precise ratio, compared to the crankshaft, so that the dance goes off without a hitch.

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.

Your timing belt or timing chain connects your crankshaft to your camshaft, or multiple camshafts, and conducts the intricate dance that plays out in your running engine, managing the input and output of air, fuel, and exhaust. A timing failure can catastrophically damage the engine, so read on to learn about how to maintain this important engine part.

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You can still drive with a bad wheel bearing, but we wouldn’t recommend it for long distances. Keep your mileage to a minimum and look out for worsening symptoms of a wheel bearing fault; we cover the symptoms to check for later in this guide.

If you decide to attempt the repair yourself, consult your owner’s manual for any specifications, do research online to prepare for the repair and get all your timing belts and chains at AutoZone. Many timing belts can be purchased with accessory parts, like gaskets, pulleys, tensioners, and even water pumps, in a kit that makes the overall cost less impactful.

The cost of a wheel bearing replacement in the UK is roughly £150-£300, dependent on the make and model of your car and a mechanic’s labour costs. The good news is that you don’t need to replace all wheel bearings at once if the other three remain in a safe and serviceable condition.

Timing belts are made of rubber and reinforced with other materials like Kevlar to add strength and stretch resistance. Some advantages of timing belts are:

Typically, wheel bearings have a lifespan of around 85,000 to 100,000 miles, so if your car is approaching these kinds of figures, it’s important to keep an eye on the tell-tale signs of a bearing in decline.

If you suspect you have a wheel bearing fault but aren’t sure which side of the vehicle is affected, there’s a safe and simple test you can use to check. Our step-by-step guide below can take you through how it’s done…

If you are wary of doing this slightly-complicated repair yourself, check AutoZone’s list of Preferred Shops in your area and rely on trusted professionals to make the repair.

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While they can be tricky to remove and replace, with a little elbow grease and know-how, you can repair your worn out wheel bearings.

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Confident in car maintenance DIY? Lubricate and service your car’s wheel bearings with Holts Multi-Purpose Lithium Grease. Trusted by professionals, it reduces friction and wear in all moving parts, even those that work under extreme pressure. For more top tips and advice, read the Holts blog or visit our help and advice centre.

When the car is elevated and in place, take hold of each wheel in turn and wiggle it backwards and forwards, side to side. If there is any play in the wheel, it feels wobbly or loose, or an unusual noise accompanies some minor movement, then you’ve found the problem wheel.

Timing belts do need to be replaced at a regular service interval, usually around 60,000 to 100,000 miles, and that cost can be extensive, since it requires the touch of an experienced mechanic. If you install a timing belt improperly it can severely damage the engine. Expect to pay between $100 and $400 for the parts and between $400 and $1,000 for the labor to replace your timing belt. Also, if your water pump runs off the timing belt then it can be wise to replace that at the same time, to avoid the extra cost down the road.

Replacing all of your car’s wheel bearings might cost an eye-watering sum, but it’s guaranteed to be a lot cheaper than repairing the damage should a bearing fail.

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To do that, you’ll first need to jack up your car so that both wheels are off the ground. We would strongly recommend using service ramps for this to ensure you can carry out the following checks safely.

Timing chain or beltchecker

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Timing chains last much longer than belts, especially when maintained properly. One of the best things you can do for your timing chain and your engine as a whole is to provide regular oil changes and always replace the oil filter at the same time.

The required bearing size is determined on the basis of externally acting forces and based on the durability and reliability demands of the seated bearing. The ...

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Cars are all put together by people just like you, and you can do all kinds of work on your vehicle as long as you take your time and follow repair guidelines precisely.

If you’re aware that there’s an issue with your car’s wheel bearing, it’s best to take it straight to a mechanic for a full diagnosis and repair. Often, it may just be a case of relubricating the ball bearings within the assembly before repacking them, which is significantly simpler to put right than the alternative.

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

Suspect that your car is suffering from a faulty wheel bearing? Our guide can help you check and diagnose the problem, and decide if and when it’s still safe to drive.

A modern four-stroke engine works on the cycle of ‘suck, squeeze, bang, blow’. It describes pulling in air to the cylinder, mixing it with fuel, compressing the mixture, introducing a spark that initiates combustion, and then releasing the exhaust out of the cylinder. All these actions have to happen in precise coordination for the engine to produce power and not blow itself up.

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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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One very important step when replacing a timing belt is to carefully mark the position of the crankshaft pulley and the camshaft pulleys before you remove the original belt. You may also need to use a special tool to hold the camshafts in place.

Every vehicle has either a timing belt or timing chain specified as the OEM part, and you should always replace your chain or belt with the equivalent part. All the pulleys and gear sets that make up the timing system in your car will be set up for either a chain or a belt and it’s not advisable, or even possible, to swap them out.

A timing belt does not require lubrication, and in fact, any oil or engine fluids that touch the rubber belt can damage the material and lead to failure over time. This is why timing belts are installed in a “dry” setup, away from engine fluids, while timing chains are lubricated in a “wet” setup.

Timing chainreplacement

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You might think that this is a terrible engineering decision, but interference engines are able to maximize efficiency and improve power delivery as a result of their risky engineering, so they’re here to stay.

Need to recap the signs of a failing wheel bearing? Here are the symptoms to watch out for while you’re driving, particularly when turning corners:

Once you’ve performed this basic wheel bearing test, you should have a better idea of where the problem is. Then, it’s a case of diagnosing the front or rear wheel on the side in question.

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

As you’ll know from our car maintenance glossary, bearings allow the wheels to turn freely without generating huge amounts of heat. If a bearing were to fail, the wheel can seize up altogether, resulting in catastrophic damage and the potential for a serious incident. Indeed, in the very worst-case scenario, a failed bearing can cause the wheel to rip away from the car entirely.

The maintenance costs for a vehicle with a timing chain is mostly related to your oil change interval. If you change your oil regularly, according to your manufacturer’s recommendations, it will protect the timing chain and keep it in peak condition for a long time.

In many modern engines, the valves that open for air and fuel intake and exhaust output actually share space with the moving piston, although never at the same time. This style of engine is called an interference engine and, as you can imagine, creates a requirement for those valves and pistons to be perfectly coordinated. If they step out of alignment for even a moment, the piston can strike and damage the valve, rendering the engine inoperable.

Continuing to drive on a bad wheel bearing can lead to extensive and critical damage which will be significantly more expensive to repair than a simple bearing re-grease and service. And in the worst cases, the damage from a faulty bearing that goes untreated can prove impossible to fix, particularly if it contributes to corrosion of surrounding components and the axle.

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Early vehicles used chains or gears to manage the timing and belts only became common in consumer vehicles during the 1960s. In the 1990s, automakers moved back to timing chains and modern cars tend to have a timing chain.

Your timing belt or timing chain connects your crankshaft to your camshaft, or multiple camshafts, and conducts the intricate dance that plays out in your running engine, managing the input and output of air, fuel, and exhaust. A timing failure can catastrophically damage the engine, so read on to learn about how to maintain this important engine part.

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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.

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