pulled fuel lines (and motor) from a '95 to drop in a '52.

do i need to replace the o-rings in the fittings (that require a special tool) at the motor, tank, and filter? i don't see them listed separately at rockauto.

or just push 'em all back together and not worry about it?

thanks.

 

You should be able to replace those O-rings with standard Viton O-rings of the right size. Rockauto has them in 5/16" and 3/8" sizes. I'm sure other sources have other sizes.

 

is viton a brand or a material?
assume i need something special for fuel use (i.e. not just normal o-rings from ace hardware)?
thanks.

 

Viton is a DuPont trade name for a flouro-elastomer used in a lot of O-ring applications where resistance to petrochemicals and wide temperature range are needed. Check your local auto parts store.

Don't get the O-rings from the hardware store designed for household plumbing. They will disintegrate when exposed to gasoline, and can clog up your fuel system.

 

thanks…

…and per your sig — in addition to this old truck i'm also building up a '96 Bontrager TiLite.

 

Let's hear it for vintage bikes... Enjoy the ride!

 

hmmm... no luck finding them yet. can't seem to find them on rockauto (search for 'viton' just brings up mercedes vito). advancedauto sells viton o-rings in those sizes, but all of the reviews say they will definitely not fit the fuel rail line fittings, despite the size:

Needa Parts Fuel Line Viton O-Rings- 5/16" and 3/8" 800-013: Advance Auto Parts

 

I just coat the factory o-rings with vaseline and re-install...I've never had one leak.

 

That should work too, if the lines have not been subject to excessive heat. Just slip them together and cycle the key on/off a few times to pressurize the lines. Then look for leaks at the joints.

 

They have them labeled by OD, not ID. They are 1/16th thick so you are looking for 5/16th by 7/16th and 3/8th by 1/2 inch for the smaller and bigger when you search online. My Ace had Viton for the smaller and I stopped by a friend's truck repair and got some of the larger. 88 F-250 was getting some bubbles in the fuel rail so I replaced them all when I replaced both fuel pump assemblies