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01-27-2003, 02:30 PM | #1 |
Registered User
Join Date: Jan 2003
Location: medicine hat, AB Canada
Posts: 11
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fuel tank sending unit
my friend has a 72 chev custom 10, we can't figure out why there is an extra line coming out of the sending unit in the fuel tank, it runs up the back of the cab into the roof somewhere, is this a vent or something? why does it go up into the roof? It apears to be factory
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01-27-2003, 02:33 PM | #2 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,856
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I believe it is a vent they started using in 71'.
__________________
Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
01-27-2003, 03:07 PM | #3 |
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Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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You will see the double vent on AC equipped trucks for the most
part. Does your friends truck have AC? Jim |
01-27-2003, 03:11 PM | #4 |
Registered User
Join Date: Jan 2003
Location: medicine hat, AB Canada
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no this truck does not have a/c, it is about the plainest truck you'll ever see. it is all original he bought it from the original owner, so it is the original fuel tank for the truck.
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01-27-2003, 08:06 PM | #5 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Does the smaller line go to the evaporative canister or to the fuel pump (with the larger line)?
Jim |
01-27-2003, 08:23 PM | #6 |
Can't kick the addiction!
Join Date: Jan 2002
Location: Riverton, CT 06065
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The vent line that goes up into the corner of the cab was part of the EEC (Evaporative Emissions Control) system. This vent line was produced starting in 1971 and continued into 1972 and was equipped on all 1/2 ton trucks and also on a few 3/4 ton trucks. The in-cab gas tanks in 1971 and 1972 on all 1/2 ton and some 3/4 ton trucks had the "new" style gas tank with the breather hose going from the top of the tank to the filler neck.
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