If all your regular maintenance is up to date, and you are at a loss to explain why your vehicle is still running rough and losing power, perhaps the answer to your mystery is a stretched Saturn timing belt / timing chain. The engine crankshaft turns the Saturn timing belt / timing chain in order to spin the camshaft. This ensures that the valves allow air and fuel into the engine, and exhaust out. These parts must move together, in the proper sequence, to allow your vehicle to run in a smooth and efficient fashion. The Saturn timing belt / timing chain is located at the front of the engine and is protected by a cover. As time passes and many miles are traveled, the Saturn timing belt / timing chain will wear gradually, and can stretch and eventually break. As the Saturn timing belt / timing chain begins to deteriorate symptoms such as rough idle or acceleration, excessive exhaust smoke, power loss, or backfiring can be caused, resulting from the incorrect timing of the valves and ignition. If not changed, the Saturn timing belt / timing chain may break, leaving your vehicle at a standstill. In some engine types, engine damage can result. To avoid expensive towing and repair, your Saturn timing belt / timing chain should be changed at regular intervals. Vehicle manufacturers usually provide a suggested schedule for replacement. We carry a selection of the Saturn timing belt / timing chain at great in our user-friendly online catalog. Our expert customer service makes it quick and convenient to order your Saturn timing belt /timing chain from our secure site. If you prefer, our toll-free phone line is available 24 hours a day to take your order.