As promised, hereís a step-by-step on how to install fittings on factory-style nylon fuel line WITHOUT having to buy the expensive (IMO) tool that Dorman sells. Hereís what youíll need:
A roll of tubing (Dorman 800-072 is the 3/8Ē)
The appropriate fittings for your job
Some light lubricant (I used hydraulic jack oil)
The line clamp from a brake line flaring kit (donít worry if you donít have this, thereís an alternative)
A caulking gun
A single edge razor blade or tubing cutter that used for air line (gotta be something that wonít crush as it cuts)
To start, make a clean cut of the tubing. I used a single edge razor blade.
Next, insert the end of the tubing through the end of the caulk gun as shown.
Now, clamp the tubing in the flaring tool clamp using the hole in the clamp that corresponds with the size of your tubing. Leave only enough tubing sticking out to fit all the way on to the fitting (I've actually got a little too much sticking out in my pic). Clamp it tightly, but only hand tight. It wonít slip. You donít need it as tight as is required when flaring brake lines. If youíve done that job, you know what Iím talking about.
Now seat the clamp in the far end of the caulk gun as shown. Be mindful of the tubing past the clamp. Donít let it get any pressure on it and get kinked.
Now add a little light lubricant to the fitting. Just enough to get it shiny, it doesnít need to be dripping wet.
Great, now itís time to assemble! Move the plunger forward in the gun until thereís just enough room for the fitting between the plunger and the tubing. Align the fitting with the end of the tubing and hold them in alignment with your fingers while you start to squeeze the handle of the caulk gun. Watch closely because it only takes 2-3 clicks to seat the fitting fully.
Take the clamp off of your tubing and youíre ready to move on to the next one! Alternative clamping method
If you donít have a flaring tool clamp there is another option. Iíve seen this a couple of places online but havenít built one myself. Youíll need:
a short (4-6Ē) 2X4 (or two 1X4s the same length)
a band saw or access to one
4 Ė 1.5Ē wood screws
Drill bits slightly smaller than your tubing OD (outside diameter) (ex. 5/16Ē hole for 3/8Ē tubing)
I got the pic of this type clamp below from another site so to give credit where itís due, hereís the link... http://forums.pelicanparts.com/porsc...-fittings.html
That poster actually oversized one end so the fitting would go down in there too.
You can see how to build it from the pics. You could also use 2 1X4ís screwed together and drill the hole on the seam where they meet. If doing more than one size line, you could put two different size holes in one clamp. EDIT:
I added two more pics. There were some negative comments made about the way the joint in the first set of pics I took ended up so, to show that they got better after my first attempt I added a couple of pics. The tubing clamp does leave marks on the outside of the tubing but apparently the Dorman tool does as well. The wooden clamp probably wouldn't. The marks are superficial and have no effect on the integrity of the tubing.