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.

How to tell whichwheel bearingisbadwhile driving

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.

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.

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.

Bad wheel bearingnoise

To add to my own response and give a solution, I would give it the proper type of a pointer to a function of the type GetVersion is. If GetVersion that your "env" struct field is pointing to is:

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…

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.

I have a C application that I've created in VS2008. I am creating a mock creation function that overrides function references in a struct. However if I try and do this in a straight forward fashion with something like:

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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.

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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.

It will make noise. A bad wheel bearing will typically be noisy. · Your tires are wearing badly and you have issues steering. Bad bearings will affect the ...

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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.

Wheel bearingreplacement cost

then I get a "error C2100: illegal indirection" error as *ptr, when ptr is a void * seems to be a banned construct. I can get around it by using a int/long pointer as well, mapping that to the same address and modifying the contents of the long pointer:

Frontwheel bearingnoise symptoms

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.

If you want to hold a pointer in an int type for some reason, then on Windows a UINT_PTR type (or uintptr_t from stdint.h if you have it) will hold most pointer types (I don't think it's necessarily large enough to hold some pointer-to-member types).

The right way to do this is to work with the type system, avoid all the casting and declare actual pointers to functions like:

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.

A pointer is always the size of the system word(8/16/32/64)...(unless you have segmented memory, which I'm assuming you don't have). This is because it needs to point to anywhere in the memory space. For a von Neumann machine, a function pointer is going to be the same size as a data pointer, because data and code occupy the same memory space. This is not guaranteed under a Harvard architecture. I'm not familiar enough with Windows Vista to know if it programatically fakes out a Harvard architecture for security reasons.

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How to tell whichwheel bearingisbadin the front

When dereferencing a "void *", you are left with a "void" which is has no size (or really no type for that matter), so it doesn't know how to assign something to it. It is the same as:

A rear wheel bearing and hub for BMW G87 M2, G80 M3, and G82/G83 M4. This is a Genuine BMW wheel bearing with a two year warranty.

Bad wheel bearingsymptoms

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A ball bearing device is a mechanical component used to support rotating shafts or axles while minimizing friction and allowing smooth movement.

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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:

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.

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.

However, you also talk about being worried about the size of an int type that you might store a pointer into (which generally is not something you want to do unless you have a really good reason to).

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.