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1993 rusting fuel line 900

i have a 93 regina wagon with a badly rusting pressured fuel line from the sender to the filter.

it snakes around to get to the filter so tortuously i have decided to replace it with gates barricade 27335 fuel injection hose which is flexible.

does anyone know if i will run into any pressure trouble problems using a flexible line to replace a steel around 5-6 feet in length?








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    1993 rusting fuel line 900

    You can replace hard steel line with cupronickel, it’s an alloy so it will perform like steel, but is easy to bend.








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    1993 rusting fuel line 900

    thank you all.

    the gates 27335/27348 barricade hose is the best out there with pressure rating at 225psi and permeability at virtually nil per sq meter. the cheapest i found for a 15 ft roll was rock auto at the $35 and change. it seems you can only buy 2 foot pieces then it goes to 15 and 25 feet rolls

    i was concerned there might be pulsing in the hose as the injectors pulse at the engine causing odd behavior.

    access is awful and short of dismantling the right rear suspension flexible is the only rational solution








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      1993 rusting fuel line 900

      I figured your concern would be rigidity against pulse changing the volume as would be expected with rubber. Have you considered using nylon? Certainly cheaper and proven between filter and rail.

      --
      Art Benstein near Baltimore

      "Keep in mind that random processes can fluctuate in such a way as to mimic a signal when no signal exists." --Ransom Stephens








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        1993 rusting fuel line 900

        Dear Art,

        Hope you're well. I presume - perhaps wrongly - that because the in-tank fuel pump sends far more fuel to the engine than can be used and the regulator limits both flow and pressure, any pulses due to fuel hose "bulging" would not affect injector operation.

        The fuel hose from filter-to-fuel rail is lined with a pretty rigid plastic. The in-tank fuel pumps are small. Can they generate enough pressure to bulge fuel-injection-rated fuel hose?

        I welcome the benefit of your insights.

        Yours faithfully,

        Spook








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          1993 rusting fuel line 900

          I'm thinking, Regina included, all of Volvo's high pressure fuel lines are rigid walled, whether Nylon (the plastic you see inside the foam insulation) or steel. The only place I see them using rubber line is in the return circuit or the low pressure feed from tank to main pump in the Bosch fueling.

          From reading Probst's treatise, I understand the nylon's rigidity is necessary for the mechanical (k-jet) injection to be stable.

          In the end, I bet no casual driver is going to notice the difference, but I thought perhaps Ted might find the OD of the 5/16" Nylon could match the connector at the Regina car's tank if serendipity prevails. On the filter end we (did) have this available from up there in yall's neck of the woods.



          (from http://cleanflametrap.com/fline.html
          --
          Art Benstein near Baltimore

          "If you can't fix it with a hammer, you have an electrical problem." -vwbusman66








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            1993 rusting fuel line 900

            hi art these folks are up the road from me.

            the gates hose i am going to use is 5/16 ID with a layered wall thickness of 3.3mm slightly bigger than 1/8 of an inch. its rated 225psi

            i seriously doubt the fuel pump will be able exert enough pressure to swell the hose wall enough intermittently.








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    1993 rusting fuel line 900

    Dear 1pocket,

    Hope you're wll. I recall a post by Bruce Young ("Lucid", of blessed memory), reporting how hard it had been to replace that steel fuel pipe. Access was a problem. He concluded that fuel hose is the "way to go".

    My '93 wagon just developed a pin-hole leak in the barbed steel fitting at the fuel filter's front end. The banjo bolt goes through the fitting. Plastic lined fuel hose is heat-shrunk onto the fitting. The hose goes to the fuel rail.

    The steel fitting was never supplied separate from the hose, and the hose is "no longer available". I cannibalized a Bosch fuel system part (#1312297), which connects an underside-mounted main fuel pump and the fuel filter, on a two-pump Bosch fuel system. That steel piece, emplaced in plastic-lined fuel hose, will duplicate the factory-supplied fuel hose.

    If fuel hose is OK from the the filter to the engine, there's no reason fuel hose can't be used from the tank to the filter. If you're concerned about road-hazard damage to fuel hose on the underbody, shield the hose with braided stainless steel sleeving.

    Hope this helps.

    Yours faithfully,

    Spook








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      1993 rusting fuel line 900

      Absolutely -- provided you use the proper hose. As mentioned, working pressure/temperature rating of the hose must match the use. And use a current SAE30R14 rated hose to keep permeability in check. Otherwise, you'll end up with a garage that smells like gasoline whenever the car is parked. Fuel line that meets the permeability, pressure and temp requirements will not be inexpensive.
      --
      82 242-6.2L; '17 Mazda3; '16 Crosstrek







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