It would seem like at least one of the MacNN users would have already experienced a leak if this were possible over the short term (4 or so years). Cause stuff like this doesn't always fail right at 2.5 years, there would be a bell type curve with some failing with in a few months and others lasting for 6+ years..

Also, I think if this were a major problem, Apple might put out a service recall where you brought your machine in for a check and maybe some new hose clamps, kinda like servicing a radiator on a car.

But then maybe Apple is being typical of corporations these days who have no regard for their customers and is just hoping the problem doesn't occur before 3 years.

As a side note, I've been hearing the "hamster wheel" more and more lately inside my G5. I wonder if that's a early sign of failure of the pump or not?