There are advantages and disadvantages to non-interference engines. One major disadvantage based is that they tend to produce less power everything else being equal.
I'm not sure on your vehicle, but on some vehicles, the timing belt tension is preset at the factory, and when the belt is replaced later during the vehicle's life, it is required that you go and purchase a special item. Normally some kind of spring, that will reset that precise tension. That is important or you could risk having your new belt break soon after it's installed. You can normally get the item from a dealer or a shop that does your model of car. Double check if that's the case for your vehicle, and replace it if it's required or recommended.
I would say that a water pumps lifespan is probably about the same as the timing belt. I would be very surprised to hear of a water pump lasting 180,000 miles, or about the time you'll need to replace the timing belt again. It will most likely fail between now and then. I hope this helps.
Tuesday, February 6th, 2007 AT 9:21 PM