I just purchased an injector seal kit from Napa auto for my 1994 F350 IDI turbo diesel; I had them check carefully to make sure I got the right parts. Problem is, the injector tees in the Napa kit are different than the ones on my truck. The kit has four "L's" and four straight two-way connectors, but my truck has a different layout for the injector tees, including two three-way tees that allow for a return line that connects across the top of the engine between the heads. Does anyone have any experience with the Napa kit, and is there a logical reason for the different tees? I'm having a hard time seeing how to lay out the return lines with the replacement tees, and will probably have to reuse several of the old tees to get the same set up . . .

Thanks for any help, hope this made sense. This is my first posting to the forum, but I've been enjoying the search feature for a while now, just can't find any prior postings addressing this particular problem . . .

 

i just put a new return line kit for my 87 6.9 and it wasnt the same either, i just used the old plastic tees to make the same exact system i had on before.

 

You need the TURBO set....... they are not the same. Your crossover return line is ahead of the intake....... do not reuse old fittings they are usually distorted and do not seal for long or at all.

 

paulko,
Welcome to FTE and the IDI diesel forum.

Which engine do you have?

There are several different layouts I have seen used on the return lines.

 

Thanks for all the replies. According to Napa, I do have the turbo kit, but obviously something's not quite right . . .

Dave, my VIN is 2FTJW35KORCA03159

It's the 1994 7.3 IDI factory turbo.

 

The turbo kit has a single nipple on the rear passenger side injector to keep the return line out from under the turbo up and down pipe.

Starting there I used the single, then two straight thru doubles, a double 90 on the front injector, an inline tee to pick up the fuel filter return, under the IP to another tee to pick up the IP return, into a 90 degree double and then two straight through doubles and again a 90 degree double with the second line going to the return line going down to the fuel tank selector.

Some engines have a double or triple tee on the end of the return line, some have a single line.

The inportant thing is all injectors have a return line connection, the IP has a return line connection and the fuel filter should have a return line connection.
The exact routing is not that critical, but it is a good idea on the turbo engine to keep the return line out from under the turbo.

 

Great info, thanks Dave. Totally clear and I know the way forward now. Since my kit didn't come with a single-nipple tee (and I'm in a bit of a hurry - gotta tow a heavy trailer about 500 miles tomorrow), I just attached a short piece of fuel line to the extra nipple and plugged it - I figure that should work until I have a chance to get the right part.