Postby 08Datsun » Mon Mar 15, 2010 3:22 pm
Back when my Maxima was newer, I asked my mechanics the same question. They said the hoses last a very long time as long as no oil gets on them. They advised replacing them when the car was 10 years old. I though it was crazy at the time, but those hoses were still in good shape when I finally replaced them. There are a lot more hoses than it looks. I haven't chased them all down on the PF, but the Maxima, which has an older VQ30, has about a half dozen hoses running to the heads here, to the heater there, etc. There were a couple small ones for the throttle body, too. A quick glance over the PF VQ40 shows much of the same arrangement.