Fuel pump issues

[johnbeck]

On my rebuilt 302 I took off the old mechanical fuel pump and steel 5/16ths fuel line and replaced it with a new mechanical fuel pump(Airtex 6962), a 5/16 x 3/8 brass fitting to screw into the discharge of the pump, and provide a 3/8th fitting for my pump to carburetor 3/8th" rubber fuel line to slide on to. Starting the engine, the fuel pump to brass fitting leaked a substantial, consistent drip. The pump fitting (with male tapered seat) was screwed tight to the(female tapered) pump to rubber fuel line brass fitting. Possible reasons for the leak could be: the two mating flanges of the fuel pump and the adapter fitting are different, noncompatible designs, (the brass adapter doesn't thread in as far as the steel line's male threaded fitting to mate flush(bevel to bevel), the flanges are different angles, the mating surfaces of the two flange's holes diameter's aren't compatible for a seal, or ,reason two, the made in China component's error tolerances are too wide for the flange surfaces to match. I'm thinking different fitting designs. Unfortunately I'm having difficulty finding the answer and the easiest solution(Possibly using a hard steel fuel line, hack it off a few inches long, and attach my 3/8ths inch rubber fuel line. Thanks, John B

 

[RonJones]

Is the image below the kind of adapter you’re talkin about? It should work without leaking. I’d recommend staying away from pressurized gas in chinese rubber hoses around an engine, and run steel tube instead.

 

[johnbeck]

A friend of mine that works on early fords recommended I try installing a fuel pump with a cartridge filter in the bottom(Car Quest 3541149). He took me over to a 65 Mustang he's working on, popped the hood, and there was the above mentioned fuel pump/w filter on the bottom. I purchased one, looking to install it, but it looks awfully close to the cross member. Great improvement with the filter. Anyone take a hammer to the cross member to beat in a little clearance(I read the lengths owners go to to move their differentials back - any fuel filter clearance makers out there? John B

 

[johnbeck]

Too much work to get clearance between the pump and the cross member. I'm back to figuring out whether to purchase a different pump or a different fitting. John B

 

[jckkys]

Why change the diameter of the pump to carb fuel line? You're just adding more places to leak and a 5/16" flows several times the needs of a 302. I agree that rubber hose, likely from China, is a fire hazard. By 1983 Ford made fuel filters that have a 5/16" double flare fitting for Ford and Holley carbs.

 

[johnbeck]

When I bought my Bronco seven years ago it had an Edelbrock carburetor 1406 with a 3/8 fuel line nipple screwed in the side. Unfortunately Edelbrock does not sell 5/16ths fittings so I'm running the 3/8ths.