Banjo fittings again

[CAW440]

The Banjo fittings that Genos offers? I understand the tapped one is for the pressure sensor,but do they offer that much of a performance gain for an almost stock truck and also where are these five fittings located and is it a tough job to swap them out? Sorry for the long post, any info would be appreciated.

 

[Steve Campbell]

The location--one on the fuel tank side of the lift pump

--two between the lift pump and fuel filter

--two between the fuel filter and injection (VP44) pump



IMHO-they are needed for even the slightest modification to the engines power output-I would suggest drilling your own or buying Geno's even if you do not have plans in that direction. The drilled Banjo bolt for fuel pressure sender is the best part of all. The cost savings of only changing your fuel filter when necessary(plus the peace of mind of knowing you have positive pressure to the VP44 at all times) will pay for the installation of a fuel pressure guage in the long run.

Hope that helps.

 

[Dave Ratcliffe]

How hard of an install are these? Do we have to drain the fuel lines and re-prime it?

 

[RustyJC]

Originally posted by Dave Ratcliffe

How hard of an install are these?

Access with my fat hands was tough. The stockers take a 17mm wrench or socket - the replacements are 3/4". Be sure you have the Cummins sealing washers as you'll probably lose some of the originals. I believe Geno's ships these - I bought my bolts from Ray and had to get the washers at Cummins. You can probably reuse the originals, but be prepared!

Do we have to drain the fuel lines and re-prime it?

All I did is loosen the line from the post-filter tapped banjo bolt up at the post-filter fuel pressure sender, cycle the lift pump by bumping the starter and leaving the ignition on (the lift pump should run for about 20-25 seconds), and tighten the braided stainless steel hose at the sending unit when I stopped getting air bubbles. It fired right up on the first try.



Rusty

 

[cap-n-cray]

Tapped bolt

I ordered Ray's banjo bolts from Geno's. The taped one only theards on 1. 5 times before the pipe fitting gets real tight. Does not seem to make a difference what type male fitting I use it's always about 1. 5 times. Most fittings I have used you get at least 3 times around before tightening. I have not put a hard wrench to it yet, but I would like more theards holding it together. Any thoughts?



Cary

 

[RustyJC]

If I understand you correctly, the 1/8" NPT male fitting you're threading into the tapped banjo bolt is getting tight after 1-1/2 turns. I don't recall having this problem, but if I were, I'd use a 1/8" NPT tap to chase the threads in the banjo fitting and even tap the threads out a little more if required - since a National Pipe Thread is a tapered thread, running the tap in a little farther will allow the male fitting to run in a little farther as well.



Rusty

 

[Chace TX]

Same problem as above.

I bought mine from Ray a while back. I plan on adding a fuel pressure gauge later, so I bought two tapped. I went to the parts store and got two 1/8" npt plugs, they did not thread more than 1. 5 turns or so. I tried an 1/8" oil pressure adapter and had the same results. Even with wrenches they would not thread much further. So, right now the bolts are still in the package on the shelf. Was afraid that I would lose a plug and start blowing fuel everywhere. Guess I will chase the threads before I install them.