If the drive belt does not extend more than that, then if your car is equipped with active tensioners, you should concentrate. First start the transmitter, try to load the auxiliary transmission mechanism (such as lamp, air conditioner, wheel rotation, etc.), and then observe the belt tension arm; when the engine is working, the suspension pipe of the belt tensioner should have small displacement. If the seat belt pretensioner is not removable, the starter is turned off and the worker moves the starter within the working stroke of the suspension tube of the belt pretensioner, which is approximately 1 / 4 inch displacement. If the belt pretensioner cannot be moved, it indicates that the belt pretensioner is faulty and should be replaced in time. If the displacement of the belt tensioner cantilever exceeds 1 / 4 inch, the spring load is significantly too small, which will cause the belt to slip. If the ordinary belt is removed again, if it is the same as usual, just replace the belt tensioner.

如果皮带没有过度拉伸且主动张紧装置工作状态良好，请查看皮带的工作面是否可以像镜子一样磨光。这是皮带过度磨损导致皮带打滑的典型例子。滑轮表面的油漆就是滑动的证据。

If the belt is not over stretched and the active tensioning device is in good working condition, check whether the working surface of the belt can be polished like a mirror. This is a typical example of belt slippage caused by excessive belt wear. The paint on the surface of the pulley is evidence of sliding.

如果皮带只在潮湿的天气下吱吱作响，皮带和皮带轮表面也将得到润滑。让我们做同样的实验：让辅助传动系统带负荷工作，用洒水器在软管上洒水。如果有噪音，请更换皮带。

If the belt squeaks only in wet weather, the belt and pulley surfaces will also be lubricated. Let's do the same experiment: let the auxiliary drive system work with load and spray water on the hose with a sprinkler. If there is noise, replace the belt.

长时间尖叫或反耳噪音

Long time squeal or anti ear noise

虽然皮带轮表面由于沙子或旧皮带等污垢而向后安装，但皮带可能会因长尖叫声或反耳噪音而缩回，但这通常是由于辅助机构的不正确拆卸造成的。

Although the surface of the pulley is installed backward due to dirt such as sand or old belts, the belt may retract due to long squeaks or anti ear noises, which are usually caused by incorrect removal of auxiliary mechanisms.

如果噪音是在一辆新车即将启动时发出的，可能是由于原制造厂的质量差。检查您认为可能导致问题的相关部分。如果以上噪音发生在一辆旧车上，那么您应该考虑是否可以完全更换一些辅助执行器的相关附件。仔细查看已更换的零件（如开关发电机、动力转向泵等），看其安装支架是否牢固牢固。另外，在安装过程中保持垫圈或衬套在适当的位置，它们也可以拆下皮带轮。

If the noise is emitted when a new car is about to start, it may be due to the poor quality of the original manufacturer. Check the relevant parts that you think may cause the problem. If the above noise occurs in an old car, you should consider whether it is possible to completely replace some accessories related to auxiliary actuators. Carefully check the replaced parts (such as switch generator, power steering pump, etc.) to see whether the mounting bracket is firm and firm. In addition, they can also be removed by keeping the washer or bushing in place during installation.

拆下正时齿轮皮带并在安装后立即调整。这就是指示正时皮带旋转方向的原因。如果由于其他维护工作而在拆下正时齿轮后拆下时尚齿轮，则可以在皮带移动时听到尖锐的后耳吱吱声。你试着倒转皮带的安装方向，看看问题是否能。

Remove timing gear belt and adjust immediately after installation. This is the reason for indicating the direction of rotation of the timing belt. If the fashion gear is removed after the timing gear is removed due to other maintenance work, a sharp rear ear squeak can be heard as the belt moves. You try to reverse the direction of the belt installation to see if the problem can be eliminated.

间歇嗡嗡声或嗡嗡声随启动器速度增加而增大，这意味着辅助驱动机构的轴承缺油。借助听诊器，你可以进一步检查噪音。然后拆下传动带，用手转动可疑的有缺陷的零件。如果转动困难或声音粗糙且耳朵缩回，不要更换轴承或相应的零件。但是，需要注意的是，每次更换辅助传动部件时，不要忘记更换皮带张紧装置和主动张紧装置。

Intermittent hum or buzz increases with the speed of the starter, which means that the bearings of the auxiliary drive mechanism are short of oil. With the help of stethoscope, you can further check the noise. Then remove the drive belt and turn the suspected defective part by hand. If it is difficult to turn or the sound is rough and the ears are retracted, do not replace the bearing or corresponding parts. However, it should be noted that the belt tensioning device and the active tensioning device should not be forgotten to replace each auxiliary transmission component.

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