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Unlike the drive belt of the accessory, the drive belt is easy to see and easy to inspect. Timing belts are often hidden behind a lid to be touched by the engine and engine compartment. However, in most cases, the cover on the timing belt, at least the upper half of the lid, can be removed or removed so that you can carefully check and replace the belt. Check, if you see not a well maintained, tight belt, you should replace it in time.
Belt rupture
Timing belt is broken, if the belt teeth, then the valve will stop in the open state, at the same time, the engine stops running; rupture if the engine is idling, it means that a gap exists between the piston stroke and the top in open valve. These two cases of rupture, damage just timing belt itself. However, if the engine is “fit” design, piston and valve occupy the same space, there is no gap between them, so soon will damage other parts, such as valve, piston is bent by the punching head, scrap, the most serious may cause wall rupture and block strain, causing the engine to overhaul or replace. These failures will cost more, also face a long time can’t use the car.
Therefore, we should understand the importance of regular inspection, timely replacement of Baotou North Benz accessories timing belt. At the same time, also should know: timing belt replacement routine maintenance, day after dragged into the repair factory overhaul a lot cheaper.
Belt check
Timing belt does not break, does not mean it does not matter. As the belt grows older, the extent of its stretching must exceed the range that the tensioning device can compensate, resulting in timing sprocket slippage. And gear wear, lubricating oil adhesion also lead to slipping. Check, if there is a lower hardness, abrasion, fiber fracture or crack, crack belt phenomenon, shows that the belt has been damaged, can not continue to use. Next, check sprocket failure. Damaged sprocket can “burn” belt material and aggravate belt tooth wear. Sprocket failure may also cause the valve mechanism to produce greater resistance to timing belts.
Baotou North Benz parts belt inspection process, the first task is to check the tightness of the belt. Today most engines are equipped with a belt tensioning automatic adjustment mechanism, while some engines are equipped with manual adjustment device, but the regulator itself is automatic. Although in order to measure accurately, you can use the tools for measuring tension, but first of all, to remove the belt shell, then put in the chain between the tensiometer measurement, this check in many driving cabin is not practical. Therefore, it is best to judge the tightness of the belt by feeling.
If the belt has been found loose, it may be the belt over stretched or automatic tensioning device relaxation or stuck, there is a spring fracture. Problems found early, that is, when the belt rotation has not yet bite the belt teeth, it should be on the tensioning device reset or tighten the positioning screws. If the belt is bouncing, you should change it in time.
What if the belt is tight? You can use chalk or tape to make a mark on the back of the belt, then turn the engine by hand, check the entire belt. Check whether the abrasion of the belt or belt tooth shear, side wall crack (especially the belt tooth edge), the back of the belt have cracks and without any traces of oil, grease or wet traces of coolant. If any of these phenomena occur, the belt should be replaced and the root cause of the above problem should be identified and excluded. Of course, oil, coolant imprinting may be artificial, rather than caused by leakage. Remember, however, that the belt housing has a gasket seal that will be damaged by leaky fluid, and that the outer cover of the belt may be distorted by curling.
Baotou North Benz parts belt tooth damage, often occurs in the belt tension low (even if the belt is not significantly relaxed), sprocket grooves when there is dirt. Then check the gasket seal. However, if the tension provided by the tensioning device is too large, or the tension provided is moderate and the tensioning device is not calibrated, both may cause the belt and the back of the belt to break. This situation is relatively rare. The tensioning device without calibration leads to uneven wear of belt teeth, and produce a lot of noise. This is not a typical fault of the timing belt, but it warns that the tensioning device is not calibrated.