It happens that the wheel mounting stud fails, and it is not possible to fix it securely on the hub. Often this happens with frequent wheel removal. Damage can be different - this is a breakdown of the threaded part, breaking of the stud or its curvature. Depreciation is due to inadequate maintenance. There is a hit of dirt and sand, which in turn plays the role of an abrasive. The cause of wear is also a loose nut. Breakage of the part can be due to metal fatigue, from a strong blow and from the moment of wheel nut tightening. As a result, driving a car becomes unsafe. This fact may cause a more serious damage and a traffic accident.
Solution to this problem
If this type of breakdown occurs, a mandatory replacement of the front wheel stud is necessary.
In this case, it is advisable to change not only the broken part, but the entire set. This is characterized by the fact that when one is broken, the other studs could be damaged, although visually this may not be noticed.
Given the brand of your vehicle, the replacement process can occur both on the removed hub and directly on the car. This is due to the design features of the machine. But, as a rule, repairs can be made without removing the hub. Almost every motorist will be able to install a hairpin on their own. It is enough to have the necessary tools and a little experience in repair work.
But what if the hairpin broke off on the road? In this case, it is almost impossible to fix this malfunction. Due to the fact that the wheel is attached to the hub with a certain number of studs (from four to six, with the exception of OKA - three), you can get home or to the service station for the remaining ones. In this case, you first need to check the degree of tightening of the wheel nuts and move very carefully, avoiding large bumps, and not gain high speed. Replacing the front wheel hub stud is not a very time-consuming process, but it requires certain skills and patience.
How to dismantle an unusable part
Below are ways to solve this problem with the example of several "popular" car brands, both domestic and imported. In principle, repair work is not particularly different in its technology, but still there are some differences related to the device of a car.
Front Wheel Stud Replacement - Toyota
In this case, the object of the repair will be a Toyota Corolla car.
Immediately before the replacement, you need to decide on the purchase of a set of spare studs. The best option would be to buy the original parts, the quality of which is not in doubt. Otherwise, there is a risk of acquiring low-quality studs that can quickly break off, or their threaded part will soon break. Also, you should not make a mistake with the place of their installation. The front and
rear hubs have different studs. This tip applies to all vehicles that require replacement of a front wheel hub stud.
Step-by-step replacement process
For work, you will need a standard set of socket wrenches, a hammer, an extension, a cylinder wrench and a jack. The car is installed on a flat surface and put on the parking brake. Next, release the wheel nuts and, jacking the car, remove the wheel.
After preparatory work, proceed to remove the brake caliper.
Heads 17 unscrew the caliper mounting bolts and remove it from the disk. It is not necessary to disconnect the brake fluid supply hose, we simply move the brake housing a little to the side.
A technological connector is provided on the inside of the hub for disassembling and mounting the studs. We rotate the hub so that the damaged hairpin is located opposite this connector. Next, with a hammer, knock the stud. If it is firmly held in its seat, then you need to treat it with WD-40 or diesel fuel and let it slightly acidify. After this, dismantling will be easier, if necessary, you can use the extension.
After removing the damaged part, install a new one in its place. Installation is the same as removal. When the stud has taken its place, you should tighten it with a wheel nut so that it fits tightly in the brake disc. The replacement of the front wheel studs (including Toyota Camry) was successfully completed. If necessary, replace the remaining studs, the operation occurs in the same sequence.
It is worth noting that it is not advisable to use nuts that were installed on old studs for new bolts, since there is a possibility of damage to their threads. This can ultimately lead to rapid wear of a new set of products.
The repair process at VAZ
Replacing the front wheel studs (including Niva) is carried out almost in the same way as on the previous car.
The car is hung with a jack, the wheel, caliper and brake caliper are removed. Next, the stud-bolt is knocked out with a hammer, after comparing it with a cutout for dismantling. To prevent the wheel hub from turning, first gear must be engaged. The seat is cleaned of dirt and rust and then a new bolt is installed in it. There are longitudinal slots on the stud body and in its fit.
Therefore, you need to make sure that they match. Acting from the engine side, the stud is driven with a hammer, and then the nut is pulled up until it completely sits down. The whole amount of work takes about an hour and a half time.
Replacing front wheel stud with hub removal
Consider the example of replacing parts on Matiz cars. It is impossible to dismantle a damaged part on this car without removing the hub, since the brake disc interferes .
The first step is to remove the steering knuckle, brake caliper assembly with pads, and retracted to the side. From the first unscrew the steering rod. Next, the hub to the rack is dismantled, the ball bearing is unscrewed and knocked out. Having previously unscrewed the hub nut, remove the hub, and the drive shaft is fixed so that the CV joint does not come out of the gearbox.
In the future, the hub is disassembled and access to the studs appears.
Replacing the front wheel stud is standard. Damaged is pressed out, and a new one is installed in its place. After that, you can begin to assemble the suspension mechanism.
Removing and installing studs on a Chevrolet
First of all, all preparatory work is carried out for unhindered access to damaged parts. The wheel, caliper and brake disc are dismantled from the hub. For ease of access to the penultimate mounting bolts, it is necessary to change the steering position of the hub. Replacing the front wheel studs (including Aveo 1.6) is as follows. An unsuitable part is pressed out with a hammer using a wooden spacer, and a new hairpin is mounted in its place. Further, the entire assembly is assembled in the reverse order of removal.
As you can see, the dismantling and installation of a new set of front wheel hub bolts is entirely feasible at home. The replacement of the front wheel studs (including the "Lacetti") takes place in the same way, with the exception of one - due to the design of the hub, the brake disc cannot be removed.
Stud repair
Often motorists do not recommend repairing bolts. Firstly, it is not always possible to do (bummer and curvature). Secondly, the safety of driving a vehicle is reduced. But still they can be restored.
It is about thread damage. The replacement of the front wheel mounting stud may not be
necessary if the
thread is restored. To do this, the stud is dismantled from the hub. Then it is clamped in a vice and the bevel is removed from the end part of the file. Then, using the required size of the die, drive off the damaged area. If the part does not have cracks and chips in the base, it can be used in the future.
Care
In order not to encounter such a problem as breakdown and replacement of the front wheel studs, it is necessary to monitor the degree of tightening of the nuts. When released, the disc beats on the studs. This leads to their breakage and wear of the threads. Before you remove the wheel from the car, you need to thoroughly clean the bolts from dirt so that it does not get on the turns of the threaded connection. The same operation should be carried out before tightening the nut.
It is advisable, while unscrewing the wheel, to pre-wet the threads using any type of oil. So you ease the course of the nut. These simple manipulations contribute to the safety of the part and take much less time than the replacement and repair of wheel studs.
Additionally, be sure to check the tightness of nuts and bolts after visiting a tire fitting. There is a high probability that in a hurry a service worker may not reach the wheel and this will damage the studs at best.