944 Turbo Fuel Line Question...

[Dare]

Can confirm no coupler on my 86 951.

[Tom]

Can confirm no coupler on my 86 951.

No coupler on either line you mean?

[Dare]

No coupler on either line you mean?

That's right. No coupler on either the feed or return line. The evap line has a braided hose coupler where it transitions to the plastic line.

PXL_20220530_024443849_small.jpg (250.76 KiB) Viewed 1392 times

[Tom]

Well I managed to get the new factory fuel line in the car. Maybe someone else could have snaked it into place without moving the other pipes, but after fussing a long time, let's just say I was long overdue to bleed my brakes anyway. I installed a factory jumper on the rail, the factory fuel line back to the coupler under the car (in the pic beloe), and opted to install the Rennbay line on my return line for now. When I get the back-half of the factory 2-piece unit from gruhsy, I may end up installing that and the factory front piece I have, but it will depend in part on how much needs to come apart to get the back pipe in place.... The Rennbay unit is high quality and fit like a glove, so seems like it would last as long as the factory line.... Will post more pics tomorrow, but here's the dealer-new feed line I just put in (no leaks!).

factory-fuel-line.gif (995.27 KiB) Viewed 1367 times

[Tom]

So I'm going to try to tidy up the lines with the new rubber isolators and clamps I bought a million years ago. The black plastic clamp goes over the rubber isolator in the second picture. But... I don't have any of the plastic nuts that hold the clamp on. The stud that holds it in place is a unusual size -- an M6 nut slides over it, and it looks bigger than M5, and I'm not entirely sure if the coarse threads are actual threads or just serration marks. Does anyone have a good picture of their fuel line clamps all assembled and/or the plastic nut that holds the clamp on?

fuel-line-clamp.gif (498.86 KiB) Viewed 1344 times

hose-line-clamp2.gif (454.28 KiB) Viewed 1344 times

[Tom]

Ok, I think I figured it out. PET shows two pieces, a clamp and a nut, but when you look at those parts, they are both part number 999 511 199 40. I went rooting through the box of clamps I bought (in 2006!) and found some like the picture below. I assumed they were the wrong part, but it seems they just made the nut with the clamp as one unit, so when you hit the nut it breaks free. It's not threaded, but more of a press-on and grab arrangement. I must have figured that out 16 years ago, and subsequently lost the nuts that I broke free at the time. Will put them on tomorrow and post pics, assuming my theory pans out.

feul-line-clamp.gif (1.39 MiB) Viewed 1330 times

[gruhsy]

I will have to do some digging.

I am sure I have it somewhere

[Thom]

If your original clamps holding the lines below the car are rusty then I'd suggest replacing them with these new plastic ones. In my case they tidied up the underside quite nicely.

[Tom]

Ok, I installed the plastic clips and am pretty pleased with the current arrangement. The thick black feed line is the factory part I got from the dealer, which ties into the back half under the car. It's quite different from the original in that it has an aluminum heat jacket on the rubber pipe instead of the thick black foam. The return line has the rennbay kit with compression fitting, and seems high quality and ready to last for years. When Gruhsy's rear-half of the return line arrives, I "might" install that and the factory replacement for the front half -- just depends on how much surgery is required to snake that line into place. In the meantime, I replaced the rubber isolators and the corroded old clips for the new black plastic ones and am almost sorry they'll be hidden by the wheel well liner. It's weird how satisfying obscure new parts are.

fuel-line-clips-installed.gif (1.26 MiB) Viewed 1286 times

[gruhsy]

Look fantastic