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Fuel return line question

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Old Oct 22, 2012 | 07:48 AM
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Default Fuel return line question

I need to add a return line to my tank and was wondering if I could just use one of the vent tubes ? I have a 71 cutlass and it has 3 vent tubes built into the top of the tank.

Last edited by Houston_t; Oct 22, 2012 at 08:02 AM.
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Old Oct 22, 2012 | 12:47 PM
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Originally Posted by Houston_t
I need to add a return line to my tank and was wondering if I could just use one of the vent tubes ? I have a 71 cutlass and it has 3 vent tubes built into the top of the tank.
HMM dont see why not
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Old Oct 22, 2012 | 12:59 PM
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Just make sure they don't have a one way valve on them. Otherwise I say it should be fine. 3 vents seems really excessive to me. lol
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Old Oct 22, 2012 | 01:15 PM
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Yea I asked over on the cutlass forum what each of the vents was for but got no response. I'm thinking about just drilling a hole in the top of my sending unit and welding in a piece of 3/8 steel tube and calling it done. Just wanted to make sure however I did it I was doing it right.
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Old Oct 22, 2012 | 06:28 PM
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Do you mean 3 tubes coming off the sender flange? 1 is fuel out, should be 3/8, 1 is return from stock A/C fuel pump and 1 should be to the charcoal canister, most likely 1/4".
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Old Oct 22, 2012 | 06:32 PM
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No my tank actually has 3 vent tubes on it, my sending unit only has 1 line.
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