What are these line for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Big J · 05-13-2004, 02:04 PM

What are all these extra lines for. One of them follows the frame rail with the main fuel line and ends up at about the same place in the front. Its a 72 K5. I'm guessing a extra fuel tank, hmmmmmmmmmmm. If it is, does anyone have a pic of what its supposed to look like?

skid · 05-13-2004, 02:20 PM

It most likely goes to the charcoal canister evaporator thingy which is mounted beside the battery. Mine has a steel line that ends at the frame, then continues on with a rubber hose to the canister. It is a vent line.

**jamie72** · 05-13-2004, 05:01 PM

one goes to the charcoal canister on your passenger sidefender,under the hood,
and the rest are vents that go to the tube beside your filler hose in the tub,and one gose to the motor so it will run...

jamie

Huck · 05-13-2004, 08:07 PM

The 72's has some unique pollution control stuff like a double line going to your fuel pump - one feeds fuel to the pump and the other returns any leakage back to the fuel tank. There is also the third line that goes to the vacumn canister --to suck fumes. In many cases, these lines have been removed over the years due to rust out, rot out, or clogged lines. The factory manuals show these lines in detail so you minght want to invest in a few or trade your rear hatch for some------(:>)

05-13-2004, 02:04 PM	#1
Big J Its lookin' like a Blazer! Join Date: Aug 2003 Location: Gods Country, KY Posts: 1,773	What are these line for? What are all these extra lines for. One of them follows the frame rail with the main fuel line and ends up at about the same place in the front. Its a 72 K5. I'm guessing a extra fuel tank, hmmmmmmmmmmm. If it is, does anyone have a pic of what its supposed to look like? __________________ BAZINGA! My Build

05-13-2004, 02:20 PM	#2
skid Registered User Join Date: Dec 2003 Location: Left Coast Posts: 254	It most likely goes to the charcoal canister evaporator thingy which is mounted beside the battery. Mine has a steel line that ends at the frame, then continues on with a rubber hose to the canister. It is a vent line. __________________ Toys: 72 K5 Blazer 74 Vette

05-13-2004, 05:01 PM	#3
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,839	one goes to the charcoal canister on your passenger sidefender,under the hood, and the rest are vents that go to the tube beside your filler hose in the tub,and one gose to the motor so it will run... jamie __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

05-13-2004, 08:07 PM	#4
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	The 72's has some unique pollution control stuff like a double line going to your fuel pump - one feeds fuel to the pump and the other returns any leakage back to the fuel tank. There is also the third line that goes to the vacumn canister --to suck fumes. In many cases, these lines have been removed over the years due to rust out, rot out, or clogged lines. The factory manuals show these lines in detail so you minght want to invest in a few or trade your rear hatch for some------(:>)



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