Persistent Fuel Leak - Sediment Bowl Inlet
- Thread starter Ziggster
- Start date
petehoovie
Well-known member
I over complicate things, so that’s probably the issue. lol! I had a look at the Vintage Speed catalogue and he has a bunch of barb fittings that are listed as 1/2” - 20. He then lists other barb fittings as NPT. My threads are straight and not NPT.
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I agree. No testing until there are no leaks.
petehoovie
Well-known member
fortyfords
Senior Member
Blue Monster thread sealer works best and you don't have to over tighten the fittings.
Agree. The brass fitting I scavenged from the other fuel pump assy is tapered and I have to assume it has the correct taper. I’m swapping to a rubber fuel hose.
Picked up some 1/4” fuel hose and a 1/4” NPT to 1/4” hose barb fitting. All installed. Used the Permatex thread sealant on the brass pipe threads, but none on the flare fitting end going into the hsg. Will see if the tapered surface seals soon enough. Hopefully, I can knock this off my checklist.
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petehoovie
Well-known member
Well, my Ford fuel fitting saga continues. First the good news. The fitting(s) with hose barb solved the leak at the sediment bowl inlet.
After doing some cranking of the engine as part of my pre-start check, noticed a new leak at the carb inlet. Tried a new ferrule and new nut, and still leaked. Just like at the sediment bowl. Checking the carb from my second flathead, I noticed it had some sort of brass adapter fitting with a gasket. Removed it and installed it on my carb. Installed the same new ferrule and nut into that adapter fitting. It leaked a bit at first during more engine cranking, but stopped leaking after giving the nut another 1/4 turn. So, second leak now fixed. During further cranking, then noticed it was leaking at the fuel pump outlet!
This is beyond crazy! Not sure how to proceed. Looking at the inlet ports to the two carbs I have (one is just the upper half, and the extra fuel pump assembly, there seens to be a difference in the seat area of the second complete carb. It seems to have a “full” 45 degree tapered surface where as the other two have a flat surface with a taper “spot-faced” onto the flat surface. Hard to tell fro the pics though.
After doing some cranking of the engine as part of my pre-start check, noticed a new leak at the carb inlet. Tried a new ferrule and new nut, and still leaked. Just like at the sediment bowl. Checking the carb from my second flathead, I noticed it had some sort of brass adapter fitting with a gasket. Removed it and installed it on my carb. Installed the same new ferrule and nut into that adapter fitting. It leaked a bit at first during more engine cranking, but stopped leaking after giving the nut another 1/4 turn. So, second leak now fixed. During further cranking, then noticed it was leaking at the fuel pump outlet!
This is beyond crazy! Not sure how to proceed. Looking at the inlet ports to the two carbs I have (one is just the upper half, and the extra fuel pump assembly, there seens to be a difference in the seat area of the second complete carb. It seems to have a “full” 45 degree tapered surface where as the other two have a flat surface with a taper “spot-faced” onto the flat surface. Hard to tell fro the pics though.
petehoovie
Well-known member