Fuel system questions

[matt92idi]

So I'm in need of some help. Iv looked high and low and no one has the answer. I'm currently helping a friend with a fuel system. My question is does anyone know the thread size of the nut that connects the fuel return from the back of the head to the line that goes to the fuel cooler. Any help would be awesome and if someone would confirm that the banjos going into the hpfp is 12mmx1.5 that would be great too
Thanks
Matt

 

[White_monster]

Fuel doesn't return off the back of the head. It comes through a 12mmX1.5 banjo at the front. And the supply and return are 12mmX1.5 in the pump.

 

[matt92idi]

uhhh not what this says....
http://www.backglass.org/duncan/ps64_manual/64L_Fuel_Supply_System.pdf

 

[Jonnydime]

Like Shane said there is not a fitting on the back of the head. The line you are talking about is a tee where the return fuel from the HPFP and injectors connects and goes to the fuel cooler. If I remember correctly the hose that goes to the fuel cooler is crimped onto that line.

 

[matt92idi]

Sorry I had the front and the back of the heads mixed up but I'm talking about the fitting here. where the return lines come together

 

[Jonnydime]

That's the check valve to keep the two return flows separated. The easiest way to tap into that line is to cut the line and weld whatever type of fitting you want on there.

 

[matt92idi]

Yeah I was thinking use something like a 6.0 banjo to keep that check valve

 

[White_monster]

You don't need the check valve. The thread is -6 or -8 oring face. Any hydraulic shop will have fittings to match up.