I was wondering if anyone has any ideas on a replacement for gas tank sending unit hose. I have been using about a 10 inch piece of rubber fuel line hose to connect the sending unit to the fuel line but the hose keeps going bad about every year or two. I guess it`s because of the crappy gas we have nowadays.

Make sure you ask for and get Viton lined fuel hose next time

Cabs' gotcha

Does that hose have any stretch to it? Unfortunately I need to go from 5/16 fuel sender to a 3/8 line.

3/8" hard line I'm assuming? Go the other way & get a piece of 3/8" hose instead of 5/16" hose the wrap something around the 5/16 sender nipple to build it up a bit just not quite as high as the "flare" on the end then install the hose & clamp it with a hose clamp. It'll work fine on your suction side

Yes, 3/8 hard line. Where is the best place to get that hose? Do the local parts places have it? That stuff appears to be expensive. Luckily I don`t need much of it. I may get both the 5/16 and 3/8 hose to see which one works out the best. Thanks.

BTW, not trying to take this post off into another direction but does anyone rebuild a gas tank sending unit and install a larger 3/8 pickup tube? BTW, My sending unit is not available in the aftermarket.

Yes there is a company that does, but they change a fortune, like $250, I had to google it to find them originally and don't currently have the link. Tim
http://tristarrradiator.com/

Ok, Thanks. I will email them.

Have your parts man cut you a snip of 5/16 and 3/8 regular cheap neoprene line & see what you can do with fitment as that'll tell ya which way to go when you get ready to buy the good hose. I took a plastic? vac cap nipple (ACE hardware calls em "screw protectors" & cut the closed end off & slid it on my 5/16" pump hard nipple then slid on & hose clamped a 3/8 neoprene hose. They are pennies & I forget if I used the green or yellow one. It was just the right thickness to get the hard nipple OD closer to the hose ID and was thin enough that the flare on the end of the hard nipple still had a larger OD than the OD of the rest of the shank of the hard nipple & gave a good seal with a hose clamp right behind it. Are the windings shot (no continuity) in your sender? plus you wanna go to 3/8". Not exactly your situation but with aftermarket senders being off the charts problematic I kept my working 5/16" sender & added a 3/8" bung in the bottom of the tank which was easy since I had a new Frankie Mitchell (God rest his soul) tank going in.

What year and body style are you working on? I've had 3/8 and 1/2 hardlines welded into a stock pickup along side the stock 5/16 pickups Anything is doable , as long as you can do it or your'e willing to pay someone else to do it for you I had a 3/8 hardline added into my stock 5/16 pickup on my 1969 Dart GTS, I also replaced the stock 5/16 fuel line to the front with a 1/2 aluminum line for drag racing that car years ago.I used a Moroso Y fuel block in the rear to go from the two inlet lines to the bigger 1/2 line going up front, worked good, lasted a long time I sold that car and the new owner removed that pickup and bought one with a 3/8 pickup, I bought that car back several years later and he gave me that old pickup back also I can't remember now if that sender still worked when he remove it or not

I just found a piece of this hose in my tool box - it's by Gates. Check out these different types:

http://www.gates.com/products/automotive...-fuel-line-hose

http://www.gates.com/products/automotive...-fuel-line-hose

I think this is the stuff I have - it has "5C6H" on it: http://www.gates.com/products/automotive...iber-braid-hose

Working on a 77 Volare. I replaced the 5/16 original steel fuel line with 3/8 a while ago but I was thinking I should complete it at the sending unit also. The sending unit is working fine right now but it is 38 years old. The tube on the original sending unit appears to be soldered around the hole where it goes though the flange. I was considering trying to do it myself but I didn`t want any leaks down the road at the sending unit. The Gates hose seems like a good alternative to the Viton hose. Robert, thanks for the idea of bumping it up a little is size. I may go that way for now. Not sure yet.

You have in effect a 5/16 system. Yes the sender line needs to upgraded to 3/8 to have the flow potential of a full 3/8 line. When adding a different hard line thru the sending unit circular flat piece it (the flat piece) needs to be flanged or fittings on either side of the flat on the line for support

RR, that's not true. Yes the short length of smaller diameter tubing adds friction loss. But gasoline is liquid. That means it can change shape freely. It is not the equivalent of squeezing toothpaste out of a tube.

The effect of one foot of 5/16 may be equivalent to, say, six feet of 3/8". So in the giant scheme of things it's not that important to get the last foot of line to be the same diameter as the rest of the line.

There is the fact that the line is on the suction side of the pump, and this increased friction lowers the net head available. Again, the effect is probably immaterial, but it does exist. (I'm playing defense here.)

I have a sender that has broken the connection between plate and line. It does not appear to have been soldered on that well. I might attempt to braze it, although the existing traces of solder might make it more difficult.

It seems to me that there is a market for high quality sender/fuel pickup units.

R.

I believe that a 5/16" section in a 3/8" system will cause it to only be able to flow what the smaller (5/16) line section is capable of. I could be wrong on that tho