Wear of the timing belt - this is the case when the failure of only one unit leads to serious consequences for the engine. In this article, we've collected tips to help you extend the life of your timing belt and avoid costly repairs. What can cause breakage Service workers will tell you a lot of reasons for wear and breakage of the belt. We present here six main: Contamination with oil and other substances. Oil (especially in combination with dust), antifreeze, solvent, cleaning agents — all this has a devastating effect on the structure of rubber. Wear of the pulley. Worn or damaged pulley will cut the belt, which sooner or later will lead to its breakage. Error when selecting the degree of tension. Too strong or weak tension increases the load on the cord, leading to premature wear. Improper storage of the belt. If the timing belt is stored in a bent position for a long time, it causes deformation of the cord and accelerates wear. No protective casing. Without special protection sto