This applies specifically to Honda timing belt replacement but can be discussed for other makes/models. So is there really, truely, any merit to the belief of replacing the water pump alongwith when replacing the timing belt ? Does the condition of the water pump really call for replacing it ? Does it really stand a chance of failure any higher than other such parts ? Also, is the water pump replacement officially listed in its service procedure by the manufacturer(honda) for replacing the timing belt ? or is it just a brainchild of the service shops ? There are SO MANY other parts that are buried and hidden in the car. What if any one of those fail ? What about the oil pump ? fuel pump ? psf pump ? (those are just a few random examples, I am sure one can come up with more). Why doesn't the "its a good idea to replace them just to be safe than sorry" or "since you are in there anyway" apply to those parts as well ? Why arn't they supposedly not as liable to fail as much as the water pump ? Why isn't valve adjustment part of the timing belt even though you have the valve cover off anyway ? you see what I mean ? So is it just an old wives tale that got handed down from one generation to the other, or a sly money making ploy by the shops ? or is there any substance to this(which I have yet to see) ?