Another fuel line question! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

In The Ten Ring · 05-03-2014, 02:16 PM

Gosh I was hoping to be done asking by now...but...

I removed the in-cab lines yesterday.

My fuel line (from the sending unit through the floor) measures 5/16 inch, inside diameter.

My line to the charcoal canister measures 3/16 inch, inside diameter.

Will my fuel shutoff vale with an inside diameter of 1/4 inch create problems for my 250 I6 engine and monojet carb?

1972 1/2 ton 2 wheel drive.

Can I use 1/4 inch inside diameter to replace the vent line?

**john** · 05-03-2014, 02:19 PM

Tubing measures by outside diameter. I think all six cyl trucks had 5/16 tubing from the tank.

**chewychevy67** · 05-03-2014, 03:35 PM

Quote:

Originally Posted by john

Tubing measures by outside diameter. I think all six cyl trucks had 5/16 tubing from the tank.

1967 v8 engines are 5/16" as well. 68 v8s had 3/8" lines.

05-03-2014, 02:16 PM	#1
In The Ten Ring Registered User Join Date: Jun 2013 Location: West Virginia Posts: 6,427	Another fuel line question! Gosh I was hoping to be done asking by now...but... I removed the in-cab lines yesterday. My fuel line (from the sending unit through the floor) measures 5/16 inch, inside diameter. My line to the charcoal canister measures 3/16 inch, inside diameter. Will my fuel shutoff vale with an inside diameter of 1/4 inch create problems for my 250 I6 engine and monojet carb? 1972 1/2 ton 2 wheel drive. Can I use 1/4 inch inside diameter to replace the vent line?

05-03-2014, 02:19 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Another fuel line question! Tubing measures by outside diameter. I think all six cyl trucks had 5/16 tubing from the tank. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/



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