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#1515740 09/03/2023 8:55 PM
Joined: Jul 2019
Posts: 51
M
'Bolter
'Bolter
M Offline
Joined: Jul 2019
Posts: 51
the metal connetion between the fuel pump and the pressure side fuel line has a pesky slow drip. I cannot tighten the fitting any further. Any suggestions? (other than replacing the fuel line).
1951 chevy 216.
Thank you

Last edited by morerog; 09/03/2023 8:55 PM.
Joined: Feb 2016
Posts: 1,841
7
'Bolter
'Bolter
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what type of fitting is the joint, flare, inverted flare, compression, pipe thread?


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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J
'Bolter
'Bolter
J Online: Content
Joined: Jan 2014
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If we are talking the stock inverted flare fittings᠁.

Try loosening and tightening. Repeat that process a few times and you might get an extra quarter turn without excessive force.

If that doesn’t work, some aviation sealer or Super 300 on the male threads. Very sparingly.


1951 3100
Joined: Feb 2000
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J
'Bolter
'Bolter
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Posts: 4,886
Take it loose, add some grease on the back side of the flare and a little on the threads, then retighten and see if that helps. If not, replace the line and start again.

Joined: Jul 2019
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M
'Bolter
'Bolter
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Thanks for the thoughts thus far. connection is flared fitting; flare on the line inserted into the fuel pump joint.

Last edited by morerog; 09/06/2023 12:41 AM.
Joined: Feb 2019
Posts: 4,100
AD Addict & Tinkerer
AD Addict & Tinkerer
Joined: Feb 2019
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More than likely you’ll have to replace the fitting and re-flare the line. The flare gets work hardened after taking it off and on over the years and no longer seals. You should have enough line to cut off just the end to remake a new flare. If not, you can replace the line with a pre made-up one from the vendors or just make up a new one. I used CuNi (copper/nickel) with a cheap HF bender and it came out great.
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Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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Joined: Nov 2002
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C
Carburetion specialist
Carburetion specialist
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Joined: Nov 2002
Posts: 2,715
Fuel is designed to BURN!

A new fuel line (if you are unable to bend one) AND new fittings at both the carburetor and fuel pump are MUCH cheaper than an engine fire!

The fuel line in Phil's pictures is quite easy to bend.

Jon


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop

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