944Ross

Has anyone bought replacement hoses from the fuel pump to the filter and from the filter to hard line recently? I'm wondering if what's available is simply NOS from long ago, or if the specs for the hose has changed to work with gasohol? The '80's stuff seems to hold up pretty well but there have been new formulations for hoses that are truly superior.

Arominus

Its fairly new production, i didn't get any old hoses when i did the rear on my 944S. All were ordered from the dealer.

SpeedyC2

I ordered all new stuff from Pelican. Seemed pretty sturdy. I guess we'll find out...

F18Rep

Lindsey has a good deal on the pump to filter (I'm foggy but think I paid 20ish)...Bruce

944Ross

I checked, it's $63.

88Silver924S

See my post about 5 down from the original thread starter: http://forums.pelicanparts.com/porsc...onnectors.html

If your steel fittings are still good they can be reused and like Sharkskin did in his "How to" just replace the rubber hose which is getting old. I used Gates "Barricade" Fuel Injection hose rated to 225 psi and made for modern fuels. Use fuel injection clamps not worm gear clamps. For the savings in cost over new hoses with steel fittings you can buy the Dremel tool and cutting wheels if you don't already have one; it is a handy tool. I cut the fuel pump outlet hose collar off while still on the car so I didn't have to undo the fuel pump connection. Everything went smoothly for me and all connections are tight and dry.

Here is a photo of the filter outlet showing the fuel injection hose clamp on the original fitting. Now that the hoses are clamped on I am more likely to replace the hoses before the next 25 years. Good luck on whatever road you take.

944Ross

Thanks, that is exactly what I was looking for! Right down to the Barricade hose.

I was underneath looking at it today and sadly, it looks like the hoses in the worst shape snake up on top of the tank.... I'm afraid I'm in for a gas tank drop....

944Ross

BTW, do you have the ID's of the hoses? Were they metric or did you just use SAE?

88Silver924S

I used the 3/8" = 9.5mm for the feed line and 5/16" = 7.9mm for the return line. The 9.5 mm is tight on some fittings but a little isopropyl alcohol makes it very slippery and was recommended by Goodyear/Veyance* (which also makes hose). The alcohol evaporates extremely fast so you must work quickly.

An email reply I received from Veyance to my question of what to lubricate fuel line with when pushing hose onto barbed fittings: *"just use plain isopropyl alcohol (rubbing alcohol). Dip the hose end
about 1" deep into the alcohol then slip it over the fitting. Makes the
rubber slippery, then it quickly evaporates.
Eric Martin"

Did you catch the link to the Sharkskin write-up? It is very detailed. Good luck. If you decide to go with the swaged fittings the ones made by BoxsterGT look spiffy.

944Ross

Thanks, I've found a lot of articles on replacing hoses but none list sizes, and most are for early 944's. The Sharkskin write-up is for 928's, and did not have sizes that I could see. I'll just be splitting the crimps on the hoses at the rear, and may just buy Lart's hoses for the front.

I just realized yours is a 924S, which would be like an Early 944? I can't imagine they changed line/hose sizes?

88Silver924S

Check out this link: http://www.pelicanparts.com/cgi-bin/...r=21100800-M20

If I did this correctly that link will take you to the bulk hose section (scroll down) of Pelican Parts for examples of German Cohline hose. Notice that some of the hose is rated low pressure, some 7 bar (approx. 103 psi) and some rated 10 bar (147 psi if 1 bar = 14.7 psi) making the Gates hose at 225 working pressure the better (and easier to get & made in USA) alternative. I don't know the size convention for the Cohline hose listed but I assume that the size 9.5 X 15.5 mm means 9.5 mm inside diameter with a 15.5 outside diameter. So at 9.5mm X 15.5 mm for the 10 bar rated hose the inside diameter is the same as the Gates 3/8"/9.5mm hose. As for the return lines which I used Gates 5/16"/7.9mm which would compare with the 7.5mm Cohline I suppose. The difference is 0.4 mm which is an awfully small amount (I know the area of the inside is what's important (which is pi x radius squared). So bottom line, I believe the feed line is the same size while the return line is very slightly larger on my set-up compared to if I had used the Cohline hose. It is working fine for me so I'm happy.

I just went out to the garage and re-measured the inside diameter of the original fuel line that ran from the firewall to the fuel damper (yes I still have the old hose) and it measures 9.5 mm. Years ago I thought that it would be 10 mm but when I removed it and measured the inside diameter it is actually 9.5 mm.

Yes the 924S has the 944 engine (hence the "S") where the earlier 924 (no "S") had an VW/Audi engine.

Good luck and Happy Trails.

Under the hood: The fuel lines at the firewall and then at the fuel damper.

944Ross

Thanks, Pelican's prices are really pretty darn good, although shipping might change that.

Yes, you have the Early 944 (to 1/85) fuel setup, which is almost completely different in terms of routing, compared to the 85.5+ cars. But I'm sure the diameters are unchanged.

Arominus

Be aware that a few of the hoses for the filler neck can only be replaced by factory parts due to the moulding that has been done and one end of the hose being a different diameter than the other end. The ones that go to the check valve come to mind. Other hoses can be replaced with generic hose. Be careful with the outer diameter on the 2 hoses that go to the plastic tank in the b pillar, it's a tight fit even with factory hoses.

944Ross

Thanks for the heads-up! Is there any hope of replacing the return line by just loosening the tank, dropping down as much as possible, without pulling the tank?