[guinnessmike]

My 92 Max has no rust there but you never know what salt a car saw or if there was a rock chip or painting defect from 16 years ago?!? I have had 2 pathfinders of the same year and about the same mileage. One had the floor under the rear seats almost gone (like you saw the road through 6" holes) while the other doesn't have a hint of rust.

Not sure about your engine question. Grab a tape measure?

 

[guinnessmike]

The truck was all but free (beggars can't be choosers) and amazingly had very little rust on the rest of the body. Just in the two joining seams where the floor met the side sills under the seat. Kinda weird...