Fuel fitting sizes

Cougar281

Well-known member
Sep 11, 2006
1,965
390
83
St Louis, MO
So LONG ago, I bought and installed Kennedy Twin lift pumps, along with the billet pickup, and got it all installed. It's been so long that I don't recall the exact details, and the billet pickup instructions seem to be gone from Kennedy's site, but I seem to recall moving the vent to a smaller line coming from the sending unit and using the original vent line for something else.

Lately, I've had an issue with 'fuel weep'. It's not dripping, but I seem to be getting 'seep and creep' where it never actually drips on the ground, but sometimes when it rains, some gets washed off and is evident on the driveway.

The way I did it back then was some form of fuel hose, pushed over the factory lines and hose clamped. I'd like to look at changing to a better situation.

It seems these days there are fittings that will connect to the factory hardlines and allow AN fitting connections. Does anyone know what size the fuel lines are (so what adapter I'd need), along with what AN fittings size and a recommended braded hose size/brand?
 

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
3,901
813
113
Central OH
Correct on the 5/8" feed line. I believe the 5/8 is the OE vent and the new pickup tube is swapped to feed through that to the pump. Then the vent is switched to the old feed line port