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10-08-2012, 10:52 PM | #1 |
Active Member
Join Date: Oct 2012
Location: Deadwood SD
Posts: 173
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Gas Tank and other Questions
Got a 78 chevy duel tanks and this truck has lived a hard life ,not sure if these are the original tanks/sending units or not.Basically it has three lines coming out,1 is the main line @ is a vent(to where i have no idea) and 3rd is the return.
Now my question is ...How do i go about hooking these up ,And to what, in the manual it says i needed a three port one wire tank diverter(Got it) also there is no extra port on the mechanical fuel pump and again don't know where the vent goes. would it just be easer for me two replace the sending units with a two port? Next question. Where do i find gas tank filler hoses? Can't seem to get themat a chain store or online that i can find.If someone can steer me in the right direction i'd appreciat it. And finally(for now) i have a 73-74 grill and the bowtie is missing (sticker part) where can i get a new one .She just doesn't look right without it. Thak you guys for any and all help. Shane |
10-08-2012, 11:06 PM | #2 |
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Join Date: Mar 2012
Location: San Antonio, Tx
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Re: Gas Tank and other Questions
i think there should be a canister where the vent goes
about the filler hose i think a member here said that they had used like a radiator hose dont quote me tho
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San Antonio, TEXAS -Frog -I'm a valet and well I've driven BMWs, Mercedes, Porsche,Bentlys, fiats, Hondas, etc and well even do I like a few features, I love my shortbed, it dosent bore me out, just press on the gas and you'll remember why you love it. |
10-08-2012, 11:21 PM | #3 |
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Location: Little Rock, Arkansas
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Re: Gas Tank and other Questions
The vent line goes to the charcoal canister in the engine bay. There are two ports on the pump. The larger one is the supply smaller is return. The vent goes from tank to canister non on the pump. And as for a filler hose I think a radiator hose would work.
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1979 Sierra Classic Heavy-half 1996 Silverado x-cab "the daily" |
10-08-2012, 11:22 PM | #4 |
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Location: Deadwood SD
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Re: Gas Tank and other Questions
Thanks for the reply,sorry but I have no cannister neer the fuel tanks,and won't gas eat a radiator hose? guess i'll have to call napa in the mornin and see.
Just noticed the reply above and i have no cannister in the engine compartment or a second port on the pump,can i just leave them pluged like i found them or should i get a 2 line sending unit? |
10-08-2012, 11:25 PM | #5 |
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Location: Little Rock, Arkansas
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Re: Gas Tank and other Questions
The canister is located in the RH front side of the engine bay right by the radiator. You don't need one but when your around the truck it will smell like gas.
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1979 Sierra Classic Heavy-half 1996 Silverado x-cab "the daily" |
10-08-2012, 11:29 PM | #6 |
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Re: Gas Tank and other Questions
What about just leaving it pluged like i found it?
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10-08-2012, 11:32 PM | #7 |
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Re: Gas Tank and other Questions
That's a bad idea. If you have the fuel vapors building up it'll pressurize the tank and could explode. Oh and classic industries does have a filler neck, and im sure they have a charcoal canister as well.
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1979 Sierra Classic Heavy-half 1996 Silverado x-cab "the daily" |
10-08-2012, 11:33 PM | #8 |
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Join Date: Mar 2012
Location: San Antonio, Tx
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Re: Gas Tank and other Questions
i didnt have that canister on my 74
its only two pronged on the sender
__________________
San Antonio, TEXAS -Frog -I'm a valet and well I've driven BMWs, Mercedes, Porsche,Bentlys, fiats, Hondas, etc and well even do I like a few features, I love my shortbed, it dosent bore me out, just press on the gas and you'll remember why you love it. |
10-08-2012, 11:41 PM | #9 | |
Active Member
Join Date: Oct 2012
Location: Deadwood SD
Posts: 173
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Re: Gas Tank and other Questions
Quote:
Sorry i guess i'm not explaining things too good here,The metal part is fine it's the gashose i can't find,As in discontinued so says napa.but if like you say radiator hose should work then i'll try to match something up there.i just thought gas would eat it for some odd reason. |
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10-08-2012, 11:45 PM | #10 |
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Re: Gas Tank and other Questions
Classic industries part#G2666
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1979 Sierra Classic Heavy-half 1996 Silverado x-cab "the daily" |
10-09-2012, 12:01 AM | #11 |
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Location: Deadwood SD
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Re: Gas Tank and other Questions
Still in the catalog but discontinued i am going to try the 70-81 version part #g2670
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10-09-2012, 04:20 PM | #12 |
78K & 79C Jimmys
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Location: Ottawa Ont CANADA
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Re: Gas Tank and other Questions
my Jimmy 78 didn't come with the cannister
79 did tho 78 stock 305 2 gas lines 79 stock 305 3 gas lines for me it was 3/8 feed 5/16 vapour 1/4 liquid return
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
10-09-2012, 04:24 PM | #13 |
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Re: Gas Tank and other Questions
not the tank vent eh?
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
10-09-2012, 06:43 PM | #14 | |
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Re: Gas Tank and other Questions
Quote:
Thanks guys for all the help on this issue i appreciate it. |
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10-09-2012, 06:51 PM | #15 | |
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Re: Gas Tank and other Questions
Quote:
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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