6.4 banjo bolt upgrade for 6.0???

[shiprek]

I have read that the 6.4 banjo bolts are used to update/upgrade the 6.0 fuel system. Where are these used and what is actually upgraded by adding? Many thanks.

I have also seen several recommendations to update the fuel pressure spring. Has anyone done this and are they happy with the results? Regards

[07OUTLAW]

Banjo bolts - They replace the banjo bolts where the fuel lines go into the heads. The original ones have smaller holes and a checkvalve, restricting flow. Will you notice a huge gain? No! Will you notice anything? I doubt it! will you theoretically improve fuel flow to the injectors? Yes. For the price you pay for new bolts/crush washers it's worth it, IMO

Updated FPR - I'm extremly happy with this one. My fuel pressure went from 50psi at idle to 64psi and at WOT, with the old spring, I'd see pressure as low as the mid 30psi range, I can't get it under 50psi now

[2 stroker]

Originally Posted by shiprek

I have read that the 6.4 banjo bolts are used to update/upgrade the 6.0 fuel system. Where are these used and what is actually upgraded by adding? Many thanks.

I have also seen several recommendations to update the fuel pressure spring. Has anyone done this and are they happy with the results? Regards

If you get a fuel pressure gauge and your pressure is low this is the fix.

Mine before i installed the fuel pressure gauge i had 50 lbs at idle and 44 at WOT and that is to low, installed the kit now 62 idle and 58 WOT, low fuel pressure will kill injectors and over 70 lbs may blow injector o-rings.

The Reg. Kit number is 3C3Z-9T517-AG and you get it form Ford
The spring is located behind the small plate that the return line attaches to. This is probably one of the easiest repairs you can make... Take the four screws loose (they are T-27 torx screws), change pull the old spring out of the brass cup, put the new spring in and re-install the plate. When you are taking it loose, keep your thumb on the plate so the spring/cup doesn't pop out and also use your thumb to hold the plate up tight to the fuel bowl when re-installing, so the screws can be threaded in good. If you buy the whole kit (which I think is the only way you can get it from Ford), I would replace the brass cup while you are at it..
You can see the plate and return line here.
Page 30: Fuel Supply System

The only hard part is the hose is in the way, you need to get a turkey baster a new one and suck out all the fuel from the upper filter houseing that way you don't have a mess. After you are done you have to cycle the key 3 time 30 sec. each time to prime the fuel system. Hope this helps
2 stroker

[2 stroker]

Here you go this is a good post by Band Member over at the Dieselstop on the fuel pressure reg spring install.
Fuel Regulator Upgrade w/ Pictures - Diesel Forum - TheDieselStop.com
2 stroker

[jay diesel]

when I pick up my truck from the dealership when they are done with my ARP's I will be buying the fuel spring kit and 6.4 banjo bolts. Loooks very easy to do and hopefully my truck won't falll on its face wot on the extreme street tune. Thanks for the info

[WLDHRSE]

Originally Posted by shiprek

I have read that the 6.4 banjo bolts are used to update/upgrade the 6.0 fuel system. Where are these used and what is actually upgraded by adding? Many thanks.

I have also seen several recommendations to update the fuel pressure spring. Has anyone done this and are they happy with the results? Regards

Good thread on banjo bolts .

[DuckHunterF250]

Great thread right here with the links. It just answered every question I had about replacing the bolts and spring thanks

[Endless_Summers]

Originally Posted by WLDHRSE

Good thread on banjo bolts .

I agree.

[shiprek]

Originally Posted by shiprek

I have read that the 6.4 banjo bolts are used to update/upgrade the 6.0 fuel system. Where are these used and what is actually upgraded by adding? Many thanks.

I have also seen several recommendations to update the fuel pressure spring. Has anyone done this and are they happy with the results? Regards

Thanks to ALL!!! You have convinced me, I am going to do it. I am getting ready to change fuel filters anyway but will wait and order the new bolts and spring kits.....This forum is the greatest!

[Evil Eye]

Originally Posted by Endless_Summers

I agree.

You might be biased...