View Full Version : How To: Install PTFE hose ends and fittings

06-22-2016, 05:24 PM
There are a few write ups out there, but wanted to do my own since I am swapping over my lines right now. PTFE is essentially Teflon, which is fully compatible with ethanol fuels whereas regular rubber braided hose is usually not. It has very high pressure rating as well.

For this write up I will be using the Fragola 6000 series line and fittings. You can find it from Summit: https://m.summitracing.com/parts/fra-602026

**please exercise extreme caution when dealing with fuel lines. If not done properly and a leak were to develop, a highly dangerous fire hazard could be created. If unsure please consult with a mechanic first. I am not a mechanic and this advice is given without any explicit or implied guarantee.

Once you have your line, make a clean straight cut on the end. I like to wrap some tape around just to hold things together. This line holds together quite well already compared to regular braided line because of the outer coating. To make the cuts, I used a dremel metal cutting wheel. These wear out quickly but they make nice cuts.


Once you have your cut, the first thing you have to do is slide in the end. Don't forget, otherwise you'll be cutting again! I found it helpful to spray on some wd40 to help it slide.


Next, peel back 1/4 to 3/8" of the coating, using a sharp blade to cut it.


Peel it off


Now, take a small screwdriver and fray out the braids. Note, in this pic I forgot to have put on the end first! So I had to redo this step. Be very careful not to press against the PTFE line itself as you could damage it quite easily.


Now, press in the metal olive until the line rests firmly against the inner ridge. It might be a good idea to clean up the line edges with a blade to get rid of any frayed Teflon.


Fit the hose end and press it firmly in place.


Press both ends together and tighten it down! I found it helpful to have one end clamped in a vice. Blow it out with air as well to rid of any contaminants. I did this a few times throughout to keep things clean.


Here it is compared to the original I replaced


Overall, it was a little tricky but not that bad once you get the hang of it. You might get pricked a few times at the start from the braids but otherwise totally doable by the home mechanic.

Hope this helps someone else in the future, who might be thinking of doing their own lines.

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06-22-2016, 05:33 PM
Holy awesome Chris!

I've been eyeing the lines in mine and keep thinking there has to be a way to make them purdier. Think I'm going to do this just to keep the bay clean.

06-22-2016, 05:37 PM
As I'm doing the work on my project I have to remember to parse things out and translate them into how-to's! Otherwise the info will just get lost, especially if I expect to keep it in my head for all of time. :D

The finish on these ones is actually really nice. It's a little dull in the pics, I think because of the WD40 I sprayed. Should clean up again. But it's really nice stuff, although a tad expensive. I really like how the coating will prevent the lines from chewing other things up in the bay like regular braided line has a habit of doing.