Plastic fuel lines, Keep or ditch Options

[930cabman]

I see a few companies are selling new stainless steel fuel lines, new fuel lines on our 50 years old cars is generally not a bad idea, but how about if they appear to be in good condition? The feed line on our car is about 10mm OD with a 1mm wall. While we are in there should they be replaced for good measure.

Thanks

[930cabman]

From what I can tell everything appears ok, but for a hundred or so dollars why risk a chance for a fuel leak. I salvaged a short piece from the engine compartment and seems fine, but who knows what has happened inside the tunnel or at the ends where the lines enter/leave the tunnel. By nature I am a risk taker, but not with pressurized fuel.

[Mark Henry]

From what I can tell everything appears ok, but for a hundred or so dollars why risk a chance for a fuel leak. I salvaged a short piece from the engine compartment and seems fine, but who knows what has happened inside the tunnel or at the ends where the lines enter/leave the tunnel. By nature I am a risk taker, but not with pressurized fuel.

If you moved your pump to the front then yes one line has 30psi pressure. If your pump is still in the engine bay then the the tank lines front to rear are not pressurized. FI systems are only pressurized from the pump to the regulator, the feed and return lines are not pressurized.

Other points:
Only use FI hose clamps.
Use only FI rated hose, I used to say you can use low pressure hose on the low pressure parts of the system and you could, but I just use FI hose throughout now.
Use proper grommets wherever tube or hose passes through drilled holes in chassis metal.