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#1 |
Unending Project
Join Date: Aug 2003
Location: Sequim, WA
Posts: 337
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Fuel Lines go to roof?
These lines were connected to my stock gas tank when I pulled it. They look as if they go up into the cab and terminate near the roof somewhere. How do I get rid of them? they won't just pull out after I removed the bolt holding them in place.
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#2 |
Senior Member
![]() Join Date: Jul 2001
Location: Wellington, Ks
Posts: 10,196
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Piper, Brace your self and give a good firm pull on the two lines. They are actually one line that loops back into itself. I did the same thing on my 71 4x4 when I moved the in-cab tank to under the bed. The lines are old and stiff and fit rather tightly into the door pillar cavity. It looks as if your seat and tank are both out so you should be able to reach up into the pillar and feel for any attaching hardward but on my truck there was none. Get a good hold and PULL !
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1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks |
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#3 |
Inline 69
Join Date: Apr 2003
Location: valleysprings,california
Posts: 1,018
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pic
i think theres 1 bolt you have to take out ,it holds the clip ,,,,,,,,,jeff
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#4 |
Registered User
Join Date: Oct 2002
Location: where it's hot
Posts: 1,059
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I was told on a recent post those lines are an emissions loop . what will happen ( if anything ) to the emissions testing of the truck if they are bypassed ?
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#5 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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I THINK they let fuel vapors condense back into liquid and run back into your tank. I dont think they really hurt much besides saving you a little bit of gas....
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#6 |
Registered User
Join Date: Aug 2003
Location: Along the Erie canal NY
Posts: 124
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cab lines
One line goes out under the floor along with the fuel line and attaches to a charcoal canister in the engine compartment Another line goes from the canister to the intake to burn off the vapors. A rudimentary emissions control Mine is not hooked and truck went thru inspection . If it ws missing I doubt many shop techs would even know .
George
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71 C10 Short Fleet coughing and sputtering down the backroads 59 Apache short fleet resto started now suspended 1884 victorian home Current restoration project 1997 GMC Sierra Z71 1973 Harley FLH undressed 1949 male body somewhat abused but still starts most mornings |
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#7 |
Account Suspended
Join Date: Sep 2000
Posts: 4,002
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Those lines are unique to 71 and 72's
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#8 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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The only purpose of those was to keep raw gas from being sucked into the charcoal canister...you might want it if you are still using that. Ethier one missing will not effect emissions testing UNLESS you live in a state that does under hood inspection.
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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The emissions that this helps to prevent is vapor emissions. The same reason most every gass station has those big goofy looking rubber deal on the pump handles.
The vapor canister actually gives you a tad better MPG and a bit more off the line torque. |
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