Speaking of changing spare tires, many people have experienced it personally. The tires of the vehicles are leaking. At this time, the spare tires need to be used. Many people know how to replace the spare tires, but there is still a problem that many people will ignore. That is the torque of the wheel bolts.
The torque of the wheel bolts is a very strange concept for many car owners, but in fact this concept is very common. Basically, each screw has a certain torque, especially for the bolts that are assembled and tightened. Torque, wheel bolts are no exception.
The wheel bolts must be tightened with the correct torque. At present, there are very few repair shops or 4S maintenance personnel who will follow the maintenance manual process and the rules of use. Just like a simple full vehicle inspection, just use a normal wrench to tighten the wheel bolts, instead of using torque. Wrench the wrench.
When the tightening torque of the wheel bolts is too low, the wheel bolts are likely to be loosened during the running of the vehicle, causing an accident; when the tightening torque is too high, the wheel hubs, bolts and threads will be subjected to great torque. This causes damage.
The hub and wheel bolt constructions are matched to each other and wheel bolts of a matching length and nut shape must be used. The wheel bolts must be kept clean before assembly. There must be nothing on the threads. Under no circumstances should grease or oil be applied.
For different models of different brands, the torque required for the wheel bolts is different, and the specific torque is generally indicated in the vehicle manual of the vehicle. In general, the German cars use 17 and 19 screws, and the torque is mostly 120~180Nm. The Japanese cars use 19 and 21 screws, and the torque is mostly 100~120Nm.
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