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Do I need a return line?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by JMZ, Apr 15, 2002.

  1. JMZ

    JMZ Registered Member

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    Location:
    Gonzales , Texas
    Do I need to put a return line in my new tank?
     
  2. BobK

    BobK 1/2 ton status

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    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    If it's a carburated engine...no.
    If it has fuel injection...yes.
     
  3. Robin

    Robin 1/2 ton status

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    So, I'm in the process of stringing my tubing back onto the freshly restored frame and was pondering the same thing. The return line goes to the canister by the battery then where? Since there was an aftermarket Holley on the engine when I got it, this wasn't hooked up. I assume it's related to emissions.

    Does it have the potential to help mileage if hooked up to where ever it goes?

    Also, is the factory tubing stainless? I polished the gasline/brake tubing and was wondering if it would rust unless I coat it. Is clear laquer effective for this or is there a more professional method?
     
  4. BobK

    BobK 1/2 ton status

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    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    That's a vent tube.Your right,it's supposed to go to the charcoal canister by the battery.A rubber line goes from the canister to the carb(don't know which port though).
     

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