obs fuel line fitting size

[classic79]

Anyone know the size of the fuel lines on 89 burban along the frame, where on tbi it was joined to a braided/steel line to tb.

Trying to find a adapter to screw onto these to make it an AN fitting to the make a hose to connect to fuel rail of my new 4.8 2002 truck motor.

[farmtruc]

can't remember, but it has to be 5/16 or 3/8

[classic79]

I think its one of each or close after looking at them. They use a o-ring seal though not like a regular npt flare fitting I'm used too. Maybe some metric thing, everything else on the burb is metric it seems like.

[classic79]

Does this look like what I might need? the truck is a 1989 Chevy Suburban 2wd.

I wish I had a parts house close to just grab one and try vs ordering one.
http://www.russellperformance.com/mc...fit/fuel.shtml
O-RING ADAPTER FITTINGS
DESCRIPTION BLUE
M14 x 1.5 to -6 Flare 640820
M16 x 1.5 to -6 Flare 640830

[LS1GMCTruck]

I think your going to have to use a tubing cutter & cut the factory fitting off. I don't think it is a common fitting size they used there, on the GM fuel line. Cut it off & buy/install a compression fitting that is female AN. Then go from there. Thats what I did.

[classic79]

Well already ordered them, I tried to fit them up but the hardware store only had course thread metric bolts, but thats the right size. I will post back my results.