Fuel return modifications - PeachParts Mercedes-Benz Forum

coachgeo · #1 08-11-2003, 02:27 AM

Thanks folk for all the help thus far in my dig for information to help me better design my WVO conversion on my dieselized Mog.

OK another question, hope ya dont mind.

I see now there are TWO returns to the fuel filter on the 617. One is from the IP and the other from the injectors. Both of these or fed into the banjo bolt atop of the Fuel Filter. The banjo itself act like a T with bleed from the filter below.

Goal: To put these two returns into a selectable valve to where I can select between having the return system act normal (when Im driving on diesel) or to work for WVO (return(s) "T"ed into incomming fuel lline just before the fuel filter.)

Problem is I have a selectable valve that only allows for two flow paths. but I have 3 flow paths Im dealing with. Two returns; both into banjo, and the new return "T"ed to incomming fuel line for WVO use.

Logic says just "T" the two fuel returns together prior to the valve and whala.... problem solved. Now the valve allows two flow paths. Flow one would be for DIESEL USE where both returns flow thru the valve then out to the banjo. Flow 2 (WVO USE) would be warm return fuel from both return lines flow thru the valve and on to a "T" in the fuel line comeing into the fuel filter. This "T"ing of the fuel returns prior to the valve is my plan.

Question is the setup after the Valve for diesel use. This side has been "T"ed together before the valve .... so now.... should I use a "T" after the valve to split things again and go to both of the orginal return ports on the banjo.... or just keep it one line and block off one of the banjo ports. The Banjo essentially was "T"ing togehter the two lines anyway.

another simular option for the DIESEL SIDE is come out of the valve into a regular prefilter then "T" out of this into the two banjo ports. Not sure if this is an advantage at all or not.