fuel line

  1. D

    Suburban fuel line ideas

    Hi All, I'm new here so apologies if this is posted in a different thread and I just can't find the words to describe it. I have a 99 k2500 suburban that I've duramax swapped and although it is running and driving I need to upgrade my fuel system for the extra demand. it was originally a 6.5td...
  2. B

    Fuel Lines: Female O-Ring Flare Fitting?

    The time has come to replace the fuel lines on my 88 G20 van. The majority of the send and return lines will be replaced with 3/8 nicopp hardline with double flares/fittings at the junctions. I'm running into an issue regarding the transitions between the GM O-ring fuel line fittings and the...
  3. H

    What size fuel line and fittings does my 1994 Chevy C1500 have?

    Need to know both fuel inlet and return sizes, the size for the fuel filter inlet and outlet, and TBI base fuel adapter sizes. Going to be replacing the lines at the front of the truck, due to considerable corrosion. Gonna get AN fittings so I can run stainless braided fuel lines over the intake...
  4. A

    Replacing Quick-Connect Fuel Line

    Hey all, Hoping someone has an idea for me. While I was dropping the tank to replace the fuel pump, I didn’t quite get the return line disconnected all the way, and the quick-connect broke, I can’t get it back together, and I’m hoping someone has some idea of how to fix it since the lines are...
  5. Angelo

    Low (fuel) pressure switch that closes at <= 5 PSI

    This is for a 1996 6.5L TD ambulance which weighs approx. 12,500 lbs. Currently using a 1993 lift pump and have been happy with the higher pressure, but I want more. Right now idle is 9-10 PSI but it will drop down to 1-2 PSI at WOT. I plan to have 2 lift pumps inline. One will run constantly...
  6. Angelo

    6.5l diesel leak dripping from bottom of starter. How to locate the problematic line

    On my 1996 K3500 6.5L diesel I noticed severe dripping from under the starter. It smells and feels like diesel fuel. The fuel lines have never been changed. I know there are return lines going back to the fuel tank. Is there a map or diagram showing all the fuel lines in this truck? I've posted...
  7. A

    Fuel sending unit fitting

    I’ve got a 95 c1500 that I’ve been finishing up a lq9 swap. Im starting to tackle the fuel system and can’t seem to find the size and thread pitch of the 2 fittings coming off the sending unit. I may just be blind or stupid but I can’t find it anywhere. I’ve got some 6an line that I’m going to...
  8. Raspi454

    Fuel line replacement?

    99 tahoe 350 4 door 4x4 So my fuel lines are all rusted out, leaking fuel, and while I was at the parts store, the guy said he couldn't find a replacement. I came across this website >Fuel Lines< and was wondering if it's any good. They have various sets like pump to filter, filter to engine...
  9. Crankshaft Brad

    Front Half Fuel Line Replacement

    After my truck has been sitting for two years, because the engine was blown up, I finally got my truck running once again! bad news is that my front fuel lines are toast. I have fuel everywhere except in the throttle body... I can find the rear section of the fuel lines, but nobody has the front...
  10. Angelo

    Using PTFE tape or Teflon tape on metal fuel line fittings?

    I can't find a M16X1.5 Male or female to barb that come with an "o ring seal", other than female pair at Leroy Diesel which is $28 after shipping. I need one female and one male. This is to be used behind fuel filter only (at LP) on a 6.5l K3500. Could these tapes be used as a substitute? The...
  11. Angelo

    Tapping into fuel line behind lift pump?

    I need to connect a 12v diesel inside of my ambulance build which is a 1996 K3500 with the 6.5. It runs on 12v and diesel fuel and has it's own fuel pump, and will only consume 0.1-0.35 liters/hour according to spec although I haven't tested that. The heater comes with a separate tank that I can...
  12. Maroon96

    Double Flaring Stainless

    So I've been trying to double flare some new 3/8 stainless steel fuel line and it keeps slipping through the clamp portion of the tool. I went and borrowed another tool and had the same problem. Even got some extra leverage on the nuts and cranked everything down tight. The line still slipped...

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