The tech then inspects the parts. At this step, the tech may identify additional issues. For example, in some vehicles, the water pump is turned by the timing belt instead of the serpentine belt. If the water pump or tensioner grinds (or the water pump is leaking), it will need to be replaced. However, in this case, we automatically replace the water pump because of the amount of labor it takes to reach it – and we’re right there since the timing belt has nearly the same labor.