What are the gasoline lines made of?

[86 911]

I'm thinking of replacing any gasoline lines on my 911 that are made of any type of material (i.e. rubber) that will deteriorate. My car has stalled twice today while driving (see other thread), so I am thinking some particles are clogging the fuel filter, which is only 1 month old. What are these gasoline lines made of? Copper? Rubber?
Would you recommend replacing them if they are at least 20+ years old?

Thanks.

p.s., the other thread regarding my car stalling: 911 Stalling During Drive

[copper]

I just replaced some of mine with fuel line from a local auto parts store. They are rubber, but are designed for use with fuels. Any line will deteriorate with age I would imagine. The rubber fuel lines are thick and quite durable.

I had a leak at the carbs due to the age of my lines, which I might add, lasted 36 years.

Jim

[Paulporsche]

Matt,
Do a search on fuel lines. If you have CIS, you will need high pressure fuel lines, which are different from Jim's for his carbed engine. McMaster-Carr carries the raw materials. Dealers and our host carry finished nylon lines. Stainless steel ones are also available.

[copper]

Hey Paul!!!

Yes, my mistake. Was working on the carbs today, so I wasn't imagining any others...

When I got my fuel lines, they were in fact standard lines. There ARE other lines, which were beside these ones on the shelf (and more expensive) and are designed for fuel injected engines.

My mistake. Thanks Paul.

Jim

[86 911]

Thanks Jim and Paul for the information. To be more specific, on a 1976 911, what would the line(s) going from the tank to the fuel injectors be made of?

Thank you

[copper]

Pauls gonna have to take that one. I have no idea. If memory serves me correct, on mine they are the same rubber lines with a braided outer cover. But don't quote me.

Mine are 36 years old and still good. I get no crap in my filter at all.

[mjmoran]

Matt, there is a bit of rubber from the tank (about 10cm) to the fuel pump then turns to a hard steel tubing thru the tunnel, under the rear seats and up to the lhs front of the engine compartment. Then back to rubber fuel line. These line do deteriorate after time and warrent replacement...At the same time always a good idea to yank the tank and get it cleaned and lined (some radiator shops still do this).

good luck

[86 911]

Thank you Michael. I have replaced the rubber line going from the fuel pump to the fuel line, but not the rubber line from the tank. It looked okay when I replaced the pump though. I'll blow out the new gasoline filter tomorrow, and see if it still stalls afterwards.
I'll just not get any lines yet then if they are made of steel.

[randywebb]

Richard Parr (Mr. PMO) says to use BMW fuel line rubber hose for his carbs. I might have the exact spec. around somewhere if you want it.


also the 'white' plastic lines used for vapor...
- those lines will last a few decades and get hard and brittle, then die... I researched this and found some info I posted about 6 months ago. So wallow around in the search engine results if you want that tidbit ....


Generally, you can expect all materials used today to be superior than the ones P AG used 30 years ago.

[randywebb]

BTW, do NOT use regular PVC for the 'white' lines - it will not last and you'll get fuel vapors in the trunk & pass. compartment real soon...