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#1 |
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Join Date: Mar 2003
Location: St robert Mo
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fuel line question
From my sender in my tank (behind seat) it is metal the a small piece of rubber hose then metal out of the cab. My question is what size rubber hose do you rekon that is? Going to replace my sender and want to replace that piece while I am there.
Thanks
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#2 |
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Location: Sacramento CA
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if you don't get an answer, take a piece of the fuel line to the parts store and they can match it. You can bet NAPA will know the correct size.
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Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck. |
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#3 |
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i believe it's 3/8 for an 8chlinder truck
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#4 |
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If your truck came originally with an inline 6 engine, then the hose should be 5/16 ID. If it came originally with a V8, then the hose should be 3/8 ID. I wasn't aware of this when I ordered a sender for a '69 I had. I ordered a V8 sender, but the truck was equipped originally with an inline 6. The rigid line I had would not thread into the sender. I went to a local hydraulics supply shop and had them make me a replacement rigid line with the correct fitting and bends in it. They charged me $12.
I don't think there is any safety concern about using rubber hose inside the cab since my '72 has a short segment of rubber hose joining the sender to the metal tube that runs down through the floor (original from the factory). |
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#5 |
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5/16 for 6 banger and 2bbl V'8s (283,307), 4bbl V8 is 3/8.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
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#6 |
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any idea how to tell if it was originally a 6 or 8?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#7 |
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Here is a better question I am ordring a new sender my rigid line has the male fitting on it. Looks like he bolted a small piece of metal line to it then cut the fitting off the sender and ran rubber hose. But I am thining if I get the right one now I maybe able to bolt right up. How can I tell short of diassebling the line?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#8 |
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You might try measuring the outer diameter of the rigid line to see if it is 5/16 or 3/8. If your truck was originally equipped with a 6-cylinder engine, then the second digit in your VIN will be an S for six, otherwise it will be an E for eight.
What size wrench fits on the hex fitting on the rigid line? Last edited by pjmoreland; 10-13-2005 at 05:05 PM. |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
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your VIN... CS or KS will be an inline... CE or KE would be a V8 (of any size) and CM or KM (GMC only) would be the V-6.
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#10 |
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Here's what you don't want to have happen. The rigid line fitting was 5/16, and the sender was 3/8. If I remember correctly, the fitting on the 5/16 OD line takes a 1/2" wrench, and the fitting on a 3/8" line takes a 5/8" wrench. I'm sure someone else will chime in who knows for certain.
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#11 |
its all about the +6 inches
Join Date: Jan 2001
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Grab a 3/8 inch wrench. Slide the open end iver the fuel line as if it were a nut. If the wrench is a tight fit, it's a 3/8 inch line. If it is sloppy, then it is 5/16.
You NEED the rubber line at the bottom of the fuel line un or directly under the cab. The cab and frame move independantly of each other, and it is needed for free movement. |
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#12 |
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ok listen to this senerio. PO says he put in new sender, now 2 months later sender leaks from solder joint fuel line and float move around sometimes float gets stuck.
By vin my truck was an eight buy the 3/8 wrench test my line going into sender is tight in 3/8 wrench, line from floor is loose. So PO buys sender for 8 cylinder because that is what vin says gets it, it does not fit, cuts off fitting on sender rigs up rubber hose. In process destroys solder joint on sender. Sells truck to me. So along the way some one took that in cab rigid line from a 6 and used it in the rebuild of the eight. Does this sound like it could happen? So I should order sender for the six cylinder is what you guys are saying? Or do I need to replace the line to get more fuel flow or will it matter? Thanks
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#13 |
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Looking in chevy duty the sell fuel line for v-8 in both sizes so I guess it wont hurt performance.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#14 |
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My 72 with 307 had (from assembly plant) 5/16 sender and hard line with a short piece of hose between. I've never seen one with a flare fitting like in the pic above???
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#15 | |
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Quote:
Last edited by pjmoreland; 10-13-2005 at 06:58 PM. |
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#16 |
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True, question is now I am running a 350 with 4bbl 750 holly should I just get the sender for the 6 cylinder or should I look at replacing the fuel line front to back? I guess what I am getting at from a performance stand point am I hurting performance with the smaller line?
sweet 72 71 and up uses the rubber line from the factory. Thanks
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#17 |
its all about the +6 inches
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Location: Hilliard Ohio
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5/16 should be fine in all reality, but going to 3/8 would not be hard once the sending unit was replaced. I bent lines up on the Longhorn becouse some idiot used copper tubing. I bent them up nice and pretty and all, and it was simple.
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#18 |
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I am hoping in about 1-2 years moving the tank under bed any way and may do it then but now just want to fix leaking sender. But dont want to starve the engine either.
So the only difference between the 6 and 8 cylinder sender is the line size? Also chevy duty has the senders for 29.95 much cheaper than any one else are they junk or same just cheaper?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#19 |
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Can someone confirm for sure the only diference in the 6 and 8 cylinder senders is the fuel supply line size. And if I have 5/16 supply line I need the 6 cylinder sender.
Just want to make sure before I order. Also the senders from chevy duty are 29.95 much cheaper then the rest are they an ok company? Just dont want to get junk.
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#20 |
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If I were you, I'd order a 6 cylinder sender.
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#21 |
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ordered my sender today from chevy duty. When I bolt it to the line do I need to use any teflon tape and how tight really really tight or just normal tight?
Thanks for all your guys help.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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#22 |
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You'll be fine with the I6 5/16 lines unless you plan on feeding a thirsty big block. Don't go real tight on the flare fittings or you'll deform them and end up with a leak. NO, don't use teflon tape, that's only for pipe thread.
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#23 |
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Re: fuel line question
well replaced sender today, had to do a little bending of the fuel line to get it to line up with sender right, PO must have bent it to make it work for his rubber line setup. anyway good to go no rattling reading good and not leaking when tank is full so all good.
Thanks for all your help
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