What is the "Correct" hose to use for fuel tank venting?

[Tidybuoy]

The vent hose on my '74 is old and brittle and I am going to replace tonight. The current hose appears to be clear plastic tubing - is that correct of is it supposed to be vacuum/fuel hose?

[DRACO A5OG]

Oh no, it should be fiber wrap fuel line, check the PAG katalog for the part number.

[eastbay]

Clear hose looks correct for the mid year car

[DRACO A5OG]

Wow, just learned something. Interesting. I guess as long as it holds up to the fuel.

[Bob Kontak]

Originally Posted by DRACO A5OG

Oh no, it should be fiber wrap fuel line, check the PAG katalog for the part number.

Here's my 81.





Supplementary data:

It rubs the lotion on it's skin or else it gets the hose again. Yes she will, Precious. It will get the hose.

[SiberianDVM]

My '77 has fiber wrapped hose, but I've always hated the frayed look so I'm replacing it with smooth surface rubber fuel hose.

[moneymanager]

You've got the original plastic; same as my 74.

[75 911s]

My midyear had the same clear tube for the vent hose. I tried to move it to install the headlight relay and it burst into a million pieces. I couldn't find the right diameter hose on pelican. I have standard fuel hose from FLAPS that is close but not exact.

[911truther]

Bob// I have seen a lot of funny replies on this forum !!!! but the hose monster is sick@@@ funny@@@@ but sick ///I never would have thought about that quote and scene for a fuel line you must stay up way to late

[HarryD]

I used PVC hose from my local hardware store.

The late great Jim Sims says:

Originally Posted by Jim Sims

"Regular" PVC (vinyl) hose or tubing is not adequate for fuel or fuel vapor

From the 1972-73 Factory Parts Catalog the following fuel resistant PVC tubing is required:
ID in mm x OD in mm x length in mm
9 x 12 x 140
9 x 12 x 210 (2 pieces)
9 x 12 x 270
9 x 12 x 470
15 x 21 x 220
15 x 21 x 600
the 9 x 12 should map to 3/8" x 1/2" McMaster-Carr 5552K27
and the 15 x 21 should map to 1/2" x 5/8" McMaster-Carr 5552K28 (this PVC stretches quite a bit).

Be careful with the plastic tees and fittings; they may be NLA.

Jim

This is the McMaster Carr Catalog Page for the hoses: McMaster-Carr

[75 911s]

Yep 9mm x 12mm i think is the size. I used 3/8" X 1/2" fuel hose from FLAPS sold by the foot. You will need new hose clamps as the 1/2" OD is too big for the factory clamps.

Also, there's a 'check valve' thingy in the line to the front by the battery. It's a little metal bullet thingy. I'm not sure if it is for smell or keeping fuel going in one direction.

[75 911s]

[Rawknees'Turbo]

Vern, fess up - you didn't really start this thread to ask something as rudimentary as "what type of vent hose to use" butt wanted to slyly show off yer boss, new fuse & relay panel!

[impactbumper]

Originally Posted by Rawknees'Turbo

Vern, fess up - you didn't really start this thread to ask something as rudimentary as "what type of vent hose to use" butt wanted to slyly show off yer boss, new fuse & relay panel!

Good point, i am tackling that this weekend instead of kicking back. I will post a picture showing my hose when finished


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[Tidybuoy]

oh, did I get a new fuse panel? I completely forgot about that.

[Mick_D]

Where is this picture from? I am in desperate need of exploded diagrams with part numbers!

Originally Posted by 75 911s

[allaircooled]

Originally Posted by Mick_D

Where is this picture from? I am in desperate need of exploded diagrams with part numbers!

You can get the pdf off of Porsches website for your car. Look under Porsche classic.

[Mick_D]

Thanks. I guess that's as complete as I'm going to find, eh? I'm going to want to download at leat two, since my car's sort of an amalgem of a 1975 911 and a 1986 turbo.

[Socalozzy]

My 73 had clear hose, I got a kit from sierra madre

[Tidybuoy]

I found clear tubing at Orchard Supply Hardware and it was labeled "for chemicals, fuels, and gasses". I bought 5 feet for $2.25 and that gave me enough room to put all the hoses together at the central block and then cut to fit feeding the hose thru the maze of wiring. 1/2 hose diameter seems to be an exact, snug fit.



Installed: