Can anyone provide me with a sketch as to how the oil/water separator should be plumbed on a 2004 fuso? Seems simple, but this is just not my thing. Thanks.
Holy octopus batman. Can you make a simple line in line out sketch for me? If that would be cool. It has been bypassed for the last many years. I am not sure why. Maybe for the reasons you mentioned. Maybe I should let sleeping dogs sleep.Put the water separator in the line between the tank pick-up and the OEM filter input.
A word of caution here... given that your model is likely using a fuel injection primer pump at the engine end, it will be pulling the fuel from the tank.
Don't use a filter in the water separator/filter that is too fine, or you could starve the primer pump. I have a FG500 Parker water separator in my truck and run a 30 micron filter in it. I have not experienced any issues with that setup.
View attachment 292705