350 - Fuel Pump Leak Issues

I have a new rebuild who is close to being 90% done however, when I start to run on idle, I see gas flowing from the fitting on the fuel pump. I have not changed the fitting but the pump is fairly new also since its a rebuild ( less than 10 miles on pump) and every time i start it leaks at the fitting. I have replaced the rubber hose with a new hose, same fitting. I have used thread sealant and still get the same leak with the new hose. Could it be a fitting issue to where it is not the right size or the pump? the fitting that i have is inverted. I have tightened it with band and spring clamps and still comes shooting out of the inlet from pump to carb as if its rejecting or too much pressure. Any info would help thanks.

 

I have a rubber hose fuel line. No leaks from inlet to carb to hose ( has thread tape)... there are also no leaks at the plastic air filter on either end. Just where the inlet meets the brass fitting. Its dripping like faucet when the car runs but it will idle and gas fills up the filter and stays inside the filter and line. As if its not tight enough but I have turned it as tight as I can by hand without full power. I can say it still would come loose easily prior to me putting seal on it like opening a jar so thats why added seal thinking there is a leak between threads but even after it still comes out the same outlet on the pump. And now im boggled because i bought a new rubber line, and clamp but still the same leak.

 

https://shop.advanceautoparts.com/p...1/9075321-P?searchTerm=inverted+brass+fitting

This is the part I currently have attached between the rubber hose and fuel pump.

 

great idea on that last note. I have a 350 SS fuel line but the way its bent is not clearing the actually front of the engine. You think I should just cut the line if it fits? Because it seems like it fits of course because of it being a line for Buick 350. I know it fits in the inlet. Would it be easier to just cut it and hose it similar to a transmission line (rubber with metal) ?

 

Well yeah. I mean not that much but the normal 5-10 inches. Ill attach a old vid so that you can see how the setup is. But you can partially see where the gas is leaking on the pump. I noticed it while i was taking this video and turned he car off when I noticed it dripping.


http://www.oldbuickparts.com/product_info.php?products_id=8802

 

https://share.icloud.com/photos/0BEZQXXWGclHNd-kMAXlXc63g#Brent


It will not let me upload the video but there’s a link above for it.

 

The last couple pumps I replaced had leaks. Took them both times to garage and they had them up in air on hoist. No more problems. Tough to work on your back at my age.When I Was able to seal one up it took so much to get it loose that it put a knot on my shoulder that I still have. The idea of using original line isn't bad. Myself - I just don't have confidence in the auto zone stuff

 

A stainless steel line? That's got to be tough to bend. Again- I bought regular repop line and it was easier to bend. But a line has to close up against its flares even before the fittings are engaged. Or its gonna be crooked when tightened.

 

Yea. I figured that it could be the flaring. because the lines have a flare and the brass fitting is an inverted flare so I thinks its like 2 negative in a sense... looking for a positive. Im not planning on bending a SS line. I was thinking about cutting it about 3-5 inches long and attach to the rubber end of the fuel pump hose (to filter/carb). But It has to be the flaring the way it's coming out.

 

Short tube like this would get you by, but you probably should run a hard line instead of hose from pump to carb.

 

Yea I planning on making one of these from the line I already had since I can barely fine that type of piece individually. It’s hard to find a 350 steel line that clears the intake perfectly. The ones I have been finding all have been bent partially off somewhere to where it’s trouble to sit it properly on the front. But it’s more from the carb inlet around the timing cover.

 

Update: Got the fitting and AN fittings. All connected Tightly, but still have the same leak. I’m thinking it could be the pump maybe? Possibly faulty? Because it’s still coming out a fast rate with the new fittings. I’ve done had it installed since about April but it’s only been used in about 5mi driven and startups. And it’s still at the pump. No leaks at the carb fitting(s).

 

I’m thinking there’s a crack in flare of pump.

 

Yea i can't see it exactly unless the car is in the air. I could see the gas coming out shooting towards the backside. The fittings are tight but it seems like it coming from the pump since the lines are fittings are new. But it comes out like a light pressured jet streamed water hose so I wasn't sure what else it could be with everything else being new but leaking same spot.