The truck has 89k on it and i'm having the timing belt done this week; would it be wise to get the pump changed since it's in the same area, even though it's not leaking; for preventitive maintenance purposes, or is there life left in the pump? I don't want to take it back soon after if the pump does go out
as a mechanic, I always OFFER the customer the option. The water pump can last a long time however, as you've probably been told, it is driven off the timing belt. Therefore, if, say six months from now the pump developes a leak, its like doing the whole job over. Now, the tech won't know for sure there isn't a small weepage at the pump seal until the parts are exposed. There is a vent hole or weep hole as some call it and it will get crusty stuff on it or coolant traces from it if the seal is beginning to leak. I have personally seen a few that have gone bad by the 90K service. You'd have to be awfully optimistic to think it's gonna last another 90K. Lastly though, the part going on should be a new pump, not a rebuilt. Quality is important. The only other item you have to look forward to failing, if it hasnt already is the starter contacts. A good shop familiar with this issue will replace the two contacts in the starter instead of gouging you for a reman unit. Hope that helps. Make sure they use the correct coolant formula for your vehicle. PS: those are awsome engines. a HUGE improvement over the 3.0 litre motor.
From my experience the average life expectancy is 7 to 10 yrs depends on usage. Seems like they last longer when used more often. Hope this answers your Q' BIG CHEO
Water pump life is a direct function of proper maintenance, therefore there is no real answer to your question. At 89k you could certainly elect to replace the WP as long as the T-Belt is also being done, but it is purely a preventive maintenance item. Might save you a lot of money later, or it might not. Impossible to say. It will give you more peace of mind though.
