What should be done before installing a new timing belt?

Before installing a new timing belt, aligning all pulleys is crucial to ensure the proper functioning and longevity of the belt. When the pulleys are not aligned, it can cause uneven wear on the belt, increased tension in certain areas, and potential slippage, which can lead to premature failure of the timing system. Proper alignment ensures that the belt runs smoothly over the pulleys and maintains optimal tension throughout its operation.

While checking the tension of the old belt may provide insights into the function of the system, it does not address the immediate need for correct positioning of components with the new belt. Lubricating the pulleys is typically not recommended, as timing belts are designed to operate dry and lubrication can attract debris or cause slippage. Warming up the components may help with installation in some cases but does not replace the necessity of proper alignment for the timing belt to perform correctly.