On Tue, 20 Jun 2017 20:41:21 -0400, "Mr. Luddite"
wrote:

On 6/20/2017 7:21 PM, wrote:

I am not sure how anyone would know it is not the original engine. How
many people even know where the engine serial number is and I have
never seen it on a title in any state I have lived in. I know that was
common many years ago but not so much for the last half century.


It's not on the title and the VIN number only identifies what engine the
car is equipped with if more than one is available in that model. In
this case, there is only one engine used in the Pathfinder. The actual
serial number of the engine might be buried on the manufacturer's build
sheet some place but I haven't seen one of them in years either. They
used to hide them in places like in the springs of the back seat.


So basically swapping engines is about as important as replacing the
brake pads in the records. I would not sweat it.