The maintenance schedule for the Mitsubishi timing belt & Mitsubishi timing chain can vary according to vehicle year, model and engine type, particularly if you've made performance modifications or customizations to the vehicle's engine. The day-to-day driving circumstances can also make a difference in when this essential engine part should be changed, as more strenuous or demanding driving conditions can accelerate the deterioration of parts, like the Mitsubishi timing belt & Mitsubishi timing chain, for which tight precision really matters. As the names indicate, the Mitsubishi timing belt & Mitsubishi timing chain -- and your Mitsubishi will have one or the other, depending on the specific year, model and engine types of your vehicle -- are responsible for keeping the timing of the valves precisely in tune with the movement of the pistons, which keeps the air to fuel mixture at the levels needed to keep your vehicle running well. The idler pulley and tensioner pulley help both the Mitsubishi timing belt & Mitsubishi timing chain to perform the tasks they need to and, thus, many automotive professionals suggest replacing those pulleys when replacing a timing belt or chain, rather than going through the intensive process again at a later date due to a pulley failure. In addition, a failed pulley can disrupt the tension and cause damage to both a Mitsubishi timing belt & Mitsubishi timing chain, making it necessary to replace whichever of the two you have in your vehicle much sooner than you should. We carry the full range of Mitsubishi timing belt & Mitsubishi timing chain parts for most Mitsubishi years and models, affordably priced and easily ordered, either online or via our 24-hour toll-free telephone number.