EFI fuel line o-rings -- replace?
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Laughing Gas
Joined: May 2015
Posts: 826
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From: Golden, CO
EFI fuel line o-rings -- replace?
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.
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.
Thread Starter
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Laughing Gas
Joined: May 2015
Posts: 826
Likes: 21
From: Golden, CO
assume i need something special for fuel use (i.e. not just normal o-rings from ace hardware)?
thanks.
Lead Driver
Joined: Sep 2003
Posts: 7,015
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From: SoCal
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.
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.
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Laughing Gas
Joined: May 2015
Posts: 826
Likes: 21
From: Golden, CO
…and per your sig — in addition to this old truck i'm also building up a '96 Bontrager TiLite.
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Laughing Gas
Joined: May 2015
Posts: 826
Likes: 21
From: Golden, CO
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
Needa Parts Fuel Line Viton O-Rings- 5/16" and 3/8" 800-013: Advance Auto Parts
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.
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.
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Lead Driver
Joined: Sep 2003
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From: SoCal
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.
6th Gear
Joined: Mar 2019
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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
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
Needa Parts Fuel Line Viton O-Rings- 5/16" and 3/8" 800-013: Advance Auto Parts
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